ABB Micro drives
User’s manual
ACS255 drives (0.5…10 hp) (115V-480V Variants)
3
ACS255 drives
0.5…10 hp
User’s manual
3AXD10000528266 Rev B
EN
EFFECTIVE: 2017-06-29
© 2016 ABB Oy. All Rights Reserved.
4
7
ACS255 – IP20 (115V)
EASY START-UP GUIDE
AC SupplyVoltage
(50/60Hz)
Supply Voltage :
L1 L2 L3
-
-
-
115 Volts
1 Phase
Earth
L
N
Check the drive rating information on page 46
Fuses, Cable Sizes :
Fuses
-
-
-
Fuse Rating recommendation values given on page 46
Cable size recommendation values given on page 46
Always follow local and national codes of practice
Control Terminals :
Based on the default, out of box settings –
-
-
-
Connect a Start/Stop switch between terminals 1& 2
Close the switch to start
Open the switch to stop
-
To vary the speed from minimum (0Hz) to maximum
(60Hz) Connect a 10kΩ potentiometer to terminals 5,6
& 7.
1
2
5
6
7
10kΩ
Speed Pot
Stop - Run
Motor Cable Sizes
Cable size recommendation values given on page 46
-
Motor Connections
-
Check for Star or Delta connection according to the
motor voltage rating (See page 22)
M
Motor Nameplate Details
-
-
-
Enter the motor rated voltage in parameter 9905
Enter the motor rated current in parameter 9906
Enter the motor rated frequency in parameter 9907
8
ACS255 – IP66 (115-480V Switched Variants)
EASY START-UP GUIDE
Local Speed Potentiometer
The local speed potentiometer will adjust
the output frequency from minimum
(Parameter 2007, default setting = 0Hz) to
maximum (Parameter 2008, default
setting = 60Hz)
Mechanical Mounting
-
Information can be
found on page 17
Run Reverse / Off / Run Forward Switch
With the factory parameter settings, this
switch allows the drive to be started in
the forward and reverse operating
directions. Alternative switch functions
can be programmed, such as
Keypad operation can be
Local/Remote, hand / Off/ Auto, see page
Local Power
disconnect with lock
out provision
Motor Cable Sizes
-
Cable size
recommendation values
given on page 46
Fuses, Cable Sizes :
-
-
-
Fuse Rating recommendation values given on page 46
Always follow local and national codes of practice.
Fuses
Supply Voltage :
Motor Connections
Check for Star or Delta connection
-
-
-
115, 230, 400, 480 Volts
1 or 3 Phase
Check the drive rating
information on page 46
-
according to the motor voltage rating
(See page 22)
Motor Nameplate Details
-
-
-
Enter the motor rated voltage in
parameter 9905
Enter the motor rated current in
parameter 9906
Enter the motor rated frequency in
parameter 9907
9
ACS255 – IP66 (115-480V Non-Switched Variants)
EASY START-UP GUIDE
Mechanical Mounting
-
Information can be found
on page 17
Keypad operation can be
Motor Cable Sizes
Fuses, Cable Sizes :
-
Cable size
recommendation values
given on page 46
-
-
-
Fuse Rating recommendation values given on page 46
Cable size recommendation values given on page 46
Fuses
Motor Connections
Check for Star or Delta connection
Supply Voltage :
-
-
-
-
115, 230, 400, 480 Volts
1 or 3 Phase
Check the drive rating
information on page 46
according to the motor voltage
rating (See page 22)
Motor Nameplate Details
-
-
-
Enter the motor rated voltage in
parameter 9905
Enter the motor rated current in
parameter 9906
Enter the motor rated frequency in
parameter 9907
Declaration of Conformity
The manufacturer hereby states that the ACS255 product range conforms to the relevant safety provisions of the following council directives:
2014/30/EU (EMC) and 2014/35/EU (LVD)
2011/65/EU (RoHS)
EN 61800-5-1: 2007
Adjustable speed electrical power drive systems. Safety requirements. Electrical, thermal and energy.
Adjustable speed electrical power drive systems. EMC requirements and specific test methods
EN 61800-3 2nd Ed: 2004
/ A1:2012
EN 55011: 2007
Limits and Methods of measurement of radio disturbance characteristics of industrial, scientific and
medical (ISM) radio-frequency equipment (EMC)
EN60529 : 1992
Specifications for degrees of protection provided by enclosures
Electromagnetic Compatibility
All drives are designed with high standards of EMC in mind.
It is the responsibility of the installer to ensure that the equipment or system into which the product is incorporated complies with the EMC
legislation of the country of use. Within the European Union, equipment into which this product is incorporated must comply with the EMC
Directive 2004/108/EC. When using an ACS255 with an external filter, compliance with the following EMC Categories, as defined by EN61800-
3:2004 can be achieved:
Drive Type / Rating
EMC Category
First Environment Category C1
First Environment Category C2
Second Environment Category C3
ACS255-_ _U…
Use External EMC Filter
Use External EMC Filter
Use External EMC Filter
Compliance with EMC standards is dependent on a number of factors including the environment in which the drive is installed,
motor switching frequency, motor, cable lengths and installation methods adopted.
Note
For shielded motor cable lengths greater than 100m and up to 200m, an output dv/dt filter must be used (please refer to
http://www.abb.com/ProductGuide for further details)
All rights reserved. No part of this User Guide may be reproduced or transmitted in any form or by any means, electrical or mechanical
including photocopying, recording or by any information storage or retrieval system without permission in writing from the publisher.
ABB Drives Ltd © 2016
The manufacturer accepts no liability for any damage caused during or resulting from transport, receipt of delivery, installation or
commissioning. The manufacturer also accepts no liability for damage or consequences resulting from inappropriate, negligent or incorrect
installation, incorrect adjustment of the operating parameters of the drive, incorrect matching of the drive to the motor, incorrect installation,
unacceptable dust, moisture, corrosive substances, excessive vibration or ambient temperatures outside of the design specification.
The contents of this User Guide are believed to be correct at the time of printing. In the interest of a commitment to a policy of continuous
improvement, the manufacturer reserves the right to change the specification of the product or its performance or the contents of the User
Guide without notice.
This User Guide is for use with version 2.0x Software.
User Guide Revision B
This user guide is the “original instructions” document. All non-English versions are translations of the “original instructions”.
The manufacturer adopts a policy of continuous improvement and whilst every effort has been made to provide accurate and up to date
information, the information contained in this User Guide should be used for guidance purposes only and does not form the part of any
contract.
11
2. Safety
2.1. What this chapter contains
This chapter contains the safety instructions which you must follow when installing, operating and servicing the drive. If
ignored, physical injury or death may follow, or damage may occur to the drive, motor or driven equipment. Read the
safety instructions before you work on the unit.
2.2. Use of warnings
Warnings caution you about conditions which can result in serious injury or death and/or damage to the equipment and
advice on how to avoid the danger. The following warning symbols are used in this manual:
Electricity warning warns of hazards from electricity which can cause physical injury and/or damage to
the equipment.
General warning warns about conditions, other than those caused by electricity, which can result in
physical injury and/or damage to the equipment.
2.3. Safety in installation and maintenance
These warnings are intended for all who work on the drive, motor cable or motor.
Electricity safety
WARNING! Ignoring the instructions can cause physical injury or death, or damage to the equipment.
Only qualified electricians are allowed to install and maintain the drive!
Never work on the drive, motor cable or motor when input power is applied. After disconnecting the input power, always
wait for 10 minutes to let the intermediate circuit capacitors discharge before you start working on the drive, motor or
motor cable.
Always ensure by measuring with a multimeter (impedance at least 1 Mohm) that:
1. There is no voltage between the drive input phases L1, L2 and L3 and the ground.
2. There is no voltage between terminals + and BR and the ground.
Do not work on the control cables when power is applied to the drive or to the external control circuits. Externally supplied
control circuits may carry dangerous voltage even when the input power of the drive is switched off.
Do not make any insulation or voltage withstand tests on the drive.
Be sure the system is properly grounded before applying power. Do not apply AC power before you ensure that all
grounding instructions have been followed. Electrical shock can cause serious or fatal injury.
Note:
Even when the motor is stopped, dangerous voltage is present at the power circuit terminals L1, L2, L3 and U, V, W and + and BR.
12
General safety
WARNING! Ignoring the following instructions can cause physical injury or death, or damage to the equipment.
The drive is not field repairable. Never attempt to repair a malfunctioning drive; contact your local ABB representative or
Authorized Service Centre for replacement.
Make sure that dust from drilling does not enter the drive during the installation. Electrically conductive dust inside the drive
may cause damage or lead to malfunction.
Ensure sufficient cooling.
2.4. Safety in start-up and operation
These warnings are intended for all who plan the operation, start up or operate the drive.
WARNING! Ignoring the following instructions can cause physical injury or death, or damage to the equipment.
Before adjusting the drive and putting it into service, make sure that the motor and all driven equipment are suitable for
operation throughout the speed range provided by the drive. The drive can be adjusted to operate the motor at speeds
above and below the speed provided by connecting the motor directly to the power line.
Do not activate automatic fault reset functions if dangerous situations can occur. When activated, these functions reset the
drive and resume operation after a fault.
Do not control the motor with an AC contactor or disconnecting device (disconnecting means); use instead the control
panel start and stop keys and or external commands (I/O). The maximum allowed number of charging cycles of the DC
capacitors (that is, power-ups by applying power) is two per minute.
Note:
When parameter 1103 PRIMARY COMMAND SOURCE MODE is not set to 1 or 2, the stop key on the control panel will not
stop the drive. To stop the drive open terminal 2 of the drive control terminals.
13
Danger: Indicates a risk of electric shock, which, if not
avoided, could result in damage to the equipment and
possible injury or death.
Danger: Indicates a potentially hazardous situation
other than electrical, which if not avoided, could result
in damage to property.
The ACS255 variable speed drive is intended for professional installation and commissioning into complete equipment or systems
as part of a fixed installation. If installed incorrectly it may present a safety hazard. The ACS255 uses high voltages and currents,
carries a high level of stored electrical energy, and is used to control mechanical plant that may cause injury. Close attention is
required to system design and electrical installation to avoid hazards in either normal operation or in the event of equipment
malfunction. Only qualified electricians are allowed to install and maintain this product.
System design, installation, commissioning and maintenance must be carried out only by personnel who have the necessary
training and experience. They must carefully read this safety information and the instructions in this Guide and follow all
information regarding transport, storage, installation and use of the ACS255, including the specified environmental limitations.
Do not perform any flash test or voltage withstand test on the ACS255. Any electrical measurements required should be carried out
with the ACS255 disconnected.
Electric shock hazard! Disconnect and ISOLATE the ACS255 before attempting any work on it. High voltages are present at the
terminals and within the drive for up to 10 minutes after disconnection of the electrical supply. Always ensure by using a suitable
multimeter that no voltage is present on any drive power terminals prior to commencing any work.
Where supply to the drive is through a plug and socket connector, do not disconnect until 10 minutes have elapsed after turning off
the supply.
Ensure correct grounding connections. The ground cable must be sufficient to carry the maximum supply fault current which
normally will be limited by the fuses. Suitably rated fuses should be fitted in the mains supply to the drive, according to any local
legislation or codes.
Do not carry out any work on the drive control cables when power is applied to the drive or to the external control circuits.
Within the European Union, all machinery in which this product is used must comply with the Machinery Directive 2006/42/EC,
Safety of Machinery. In particular, the machine manufacturer is responsible for providing a main switch and ensuring the electrical
equipment complies with EN60204-1.
The level of integrity offered by the ACS255 control input functions – for example stop/start, forward/reverse and maximum speed
is not sufficient for use in safety-critical applications without independent channels of protection. All applications where
malfunction could cause injury or loss of life must be subject to a risk assessment and further protection provided where needed.
The driven motor can start at power up if the enable input signal is present.
The STOP function does not remove potentially lethal high voltages. ISOLATE the drive and wait 10 minutes before starting any
work on it. Never carry out any work on the Drive, Motor or Motor cable when the input power is still applied.
The ACS255 can be programmed to operate the driven motor at speeds above or below the speed achieved when connecting the
motor directly to the mains supply. Obtain confirmation from the manufacturers of the motor and the driven machine about
suitability for operation over the intended speed range prior to machine start up.
Do not activate the automatic fault reset function on any systems whereby this may cause a potentially dangerous situation.
The ACS255 has an Ingress Protection rating of IP20 or IP66 depending on the model. IP20 units must be installed in a suitable
enclosure.
ACS255s are intended for indoor use only.
When mounting the drive, ensure that sufficient cooling is provided. Do not carry out drilling operations with the drive in place,
dust and metal shavings from drilling may lead to damage.
The entry of conductive or flammable foreign bodies should be prevented. Flammable material should not be placed close to the
drive
Relative humidity must be less than 95% (non-condensing).
Ensure that the supply voltage, frequency and number of phases correspond to the rating of the ACS255 as delivered.
Never connect the mains power supply to the Output terminals U, V, W.
Do not install any type of automatic switchgear between the drive and the motor
Wherever control cabling is close to power cabling, maintain a minimum separation of 4 in. (100 mm) and arrange crossings at 90
degrees
Ensure that all terminals are tightened to the appropriate torque setting
Do not attempt to carry out any repair of the drive. In the case of suspected fault or malfunction, contact your local ABB
representative for further assistance.
14
3. General Information and Ratings
This chapter contains information about the ACS255 including how to identify the drive.
3.1. Type designation key
The type designation contains information on the specification and configuration of the drive. You find the type designation label attached to
the drive. The first digits from the left express the basic configuration, for example ACS255-03U-05A8-4.
The explanations of the type designation label selections are described below.
ACS255-03 U-05A8-4+B063+F278+N828
ACS255 product series
1-phase/3 phase
01 = 1-phase input
03 = 3-phase input
EMC Filter
E = Filtered
U = Non-Filtered
Output Current Rating
In format xxAy, where xx indicates the integer part and y the fractional part,
For example, 05A8 means 5.8 A.
Input Voltage Range
1 = 110…115 V AC
2 = 200…240 V AC
4 = 380…480VAC
IP66 Enclosure
Input Switch Assembly
(Speed potentiometer, run/stop and mains disconnect switch)
Low ambient Temperature version (-20deg C)
15
3.2. Drive Model Numbers – IP20
Mechanical Dimensions and Mounting information are shown in section 4.
Further Electrical Specifications are shown in section 12.2.
Output
Power
(HP)
Internal DB
transistor
Model Number
Current
(A)
Input switch assembly
Frame Size
1-phase 110V…115V AC (+/-10%) - 3 Phase 230V Output
ACS255-01U-02A3-1
ACS255-01U-04A3-1
ACS255-01U-05A8-1
0.5
1
1.5
2.3
4.3
5.8
No
No
No
No
No
Yes
E1
E1
E2
3.3. Drive Model Numbers – IP66
Mechanical Dimensions and Mounting information are shown in section 4.
Further Electrical Specifications are shown in section 12.2.
Output
Power
(HP)
Internal DB
transistor
Model Number
Current
(A)
Input switch assembly
Frame Size
1-phase 110V…115V AC (+/-10%) - 3 Phase 230V Output
ACS255-01U-02A3-1+B063
ACS255-01U-02A3-1+B063+F278
ACS255-01U-04A3-1+B063
ACS255-01U-04A3-1+B063+F278
ACS255-01U-05A8-1+B063
ACS255-01U-05A8-1+B063+F278
0.5
0.5
1
1
1.5
1.5
2.3
2.3
4.3
4.3
5.8
5.8
No
Yes
No
Yes
No
No
No
No
No
Yes
Yes
E1
E1
E1
E1
E2
E2
Yes
1-phase 200…240V AC (+/-10%) - 3 Phase Output
ACS255-01U-02A3-2+B063
ACS255-01U-02A3-2+B063+F278
ACS255-01U-04A3-2+B063
ACS255-01U-04A3-2+B063+F278
ACS255-01U-06A1-2+B063
ACS255-01U-06A1-2+B063+F278
ACS255-01U-07A0-2+B063
ACS255-01U-07A0-2+B063+F278
ACS255-01U-07A0-2+B063+D150
ACS255-01U-07A0-2+B063+F278+D150
ACS255-01U-10A5-2+B063
ACS255-01U-10A5-2+B063+F278
ACS255-01U-15A3-2+B063
0.5
0.5
1
2.3
2.3
4.3
4.3
6.1
6.1
7
7
7
7
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
E1
E1
E1
E1
E1
E1
E1
E1
E2
E2
E2
E2
E3
E3
1
1.5
1.5
2
2
2
2
3
3
5
10.5
10.5
15.3
15.3
ACS255-01U-15A3-2+B063+F278
5
3-phase 200…240V AC (+/-10%) - 3 Phase Output
ACS255-03U-02A3-2+B063
ACS255-03U-02A3-2+B063+F278
ACS255-03U-04A3-2+B063
ACS255-03U-04A3-2+B063+F278
ACS255-03U-06A1-2+B063
ACS255-03U-06A1-2+B063+F278
ACS255-03U-07A0-2+B063
ACS255-03U-07A0-2+B063+F278
ACS255-03U-10A5-2+B063
ACS255-03U-10A5-2+B063+F278
ACS255-03U-18A0-2+B063
ACS255-03U-18A0-2+B063+F278
0.5
2.3
2.3
4.3
4.3
6.1
6.1
7
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
E1
E1
E1
E1
E1
E1
E2
E2
E2
E2
E3
E3
0.5
1.0
1.0
1.5
1.5
2
2
3
3
5
7
10.5
10.5
18
5
18
3-phase 380…480V AC (+/-10%) - 3 Phase Output
ACS255-03U-01A2-4+B063
ACS255-03U-01A2-4+B063+F278
ACS255-03U-02A2-4+B063
ACS255-03U-02A2-4+B063+F278
ACS255-03U-03A3-4+B063
ACS255-03U-03A3-4+B063+F278
ACS255-03U-04A1-4+B063
ACS255-03U-04A1-4+B063+F278
ACS255-03U-04A1-4+B063+D150
ACS255-03U-04A1-4+B063+F278+D150
ACS255-03U-05A8-4+B063
ACS255-03U-05A8-4+B063+F278
ACS255-03U-09A5-4+B063
ACS255-03U-09A5-4+B063+F278
ACS255-03U-14A0-4+B063
ACS255-03U-14A0-4+B063+F278
ACS255-03U-18A0-4+B063
0.5
0.5
1
1.2
1.2
2.2
2.2
3.3
3.3
4.1
4.1
4.1
4.1
5.8
5.8
9.5
9.5
14
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
E1
E1
E1
E1
E1
E1
E1
E1
E2
E2
E2
E2
E2
E2
E3
E3
E3
E3
1
1.5
1.5
2
2
2
2
3
3
5
5
7.5
7.5
10
10
14
18
18
ACS255-03U-18A0-4+B063+F278
16
4. Mechanical Installation
4.1. General
Carefully Unpack the ACS255 and check for any signs of damage. Notify the shipper immediately if any exist.
Check the drive rating label to ensure it is of the correct type and power requirements for the application.
Store the ACS255 in its box until required. Storage should be clean and dry and within the temperature range –40°C to +60°C
The ACS255 should be mounted in a vertical position only on a flat, flame resistant vibration free mounting using the integral holes.
The ACS255 must be installed in a pollution degree 1 or 2 environment only.
Do not mount flammable material close to the ACS255
Ensure that the ambient temperature range does not exceed the permissible limits for the ACS255 given on page 46.
Provide suitable clean, moisture and contaminant free cooling air sufficient to fulfil the cooling requirements of the ACS255
4.2. Mechanical Dimensions and Mounting – IP20 Open Units
I
J
A
D
B
C
H
G
H
F
E
Weight
Drive
Frame
Size
1
A
B
C
D
E
F
G
H
I
J
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
Kg
Ib
173 6.81 160 6.30 109 4.29 162 6.38
221 8.70 207 8.15 137 5.39 209 8.23 5.3 0.21 150 5.91 109 4.29
5
0.20 123 4.84
82
3.23
50
63
1.97 5.5 0.22
2.48 5.5 0.22
10
10
0.39 1.0 2.20
0.39 1.7 3.75
2
Maximum Control Terminal Torque Settings of 0.5 Nm (4.5 lb-in)
Maximum Power Terminal Torque Settings of 1 Nm (9 lb-in)
NOTE
4.3. Guidelines for Enclosure Mounting – IP20 Units
Installation should be in a suitable enclosure, according to EN60529 or other relevant local codes or standards.
Enclosures should be made from a thermally conductive material.
Where vented enclosures are used, there should be free space clearance above and below the drive to ensure good air circulation –
see the diagram below for minimum free space clearance. Air should be drawn in below the drive and expelled above the drive.
In any environments where the conditions require it, the enclosure must be designed to protect the ACS255 against ingress of
airborne dust, corrosive gases or liquids, conductive contaminants (such as condensation, carbon dust, and metallic particles) and
sprays or splashing water from all directions.
High moisture, salt or chemical content environments should use a suitably sealed (non-vented) enclosure.
The enclosure design and layout should ensure that the adequate ventilation paths and clearances are left to allow air to circulate through the
drive heatsink. ABB Drives recommend the following minimum mounting clearance requirements for drives mounted in non-ventilated
metallic enclosures:-
Drive
Size
X
Y
Z
X
Above &
Below
Either
Side
Z
Between
mm
in
mm
in
mm
33
46
in
50
75
1.97
2.95
50
50
1.97
1.97
1.30
1.81
1
2
Note :
Y
Y
Dimension Z assumes that the drives are mounted side-by-side with
no clearance.
Typical drive heat losses are 3% of operating load conditions.
Above are guidelines only and the operating ambient temperature of
the drive MUST be maintained at all times.
X
17
4.4. Mechanical Dimensions – IP66 (Nema 4X) Enclosed Units
D
B
A
I
J
E
H
G
F
Drive
Frame
Size
A
B
D
E
F
G
H
I
J
Weight
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
kg
Ib
2.95 6.50
4.20 9.26
232.0 9.13 207.0 8.15 189.0 7.44 25.0 0.98 179.0 7.05 161.0 6.34 148.5 5.85 4.0 0.16 8.0 0.31
257.0 10.12 220.0 8.67 200.0 7.87 28.5 1.12 186.5 7.34 188.0 7.40 176.0 6.93 4.2 0.17 8.5 0.33
310.0 12.2 276.5 10.89 251.5 9.90 33.4 1.31 252 9.92 210.5 8.29 197.5 7.78 4.2 0.17 8.5 0.33
The size 3 product has 4 symmetrical mounting points
1
2
3
7.7
17
NOTE
Maximum Control Terminal Torque Settings of 0.5 Nm (4.5 lb-in)
Maximum Power Terminal Torque Settings of 1 Nm (9 lb-in)
4.5. Guidelines for Mounting Enclosed Units
Before mounting the drive, ensure that the chosen location meets the
environmental condition requirements for the drive shown in section 12.1
The drive must be mounted vertically, on a suitable flat surface
The minimum mounting clearances as shown in the table below must be
observed
X
X
The mounting site and chosen mountings should be sufficient to support
the weight of the drives
The Enclosed ACS255s can be installed side-by-side with their heatsink
flanges touching. This gives adequate ventilation space between drives.
If the ACS255 is to be installed above another drive or any other heat-
producing device, the minimum vertical spacing (X) is 150mm (5.9 inches)
above and below.
18
4.6. Gland Plate and Lock Out
The use of a suitable gland system is required to maintain the appropriate IP / Nema rating. The gland plate has pre moulded cable entry holes
for power and motor connections suitable for use with glands as shown in the following table. Where additional holes are required, these can
be drilled to suitable size. Please take care when drilling to avoid leaving any particles within the product.
Cable Gland recommended Hole Sizes & types:
Moulded Hole Size
0.866in (22mm)
1.11in (28.2mm)
Drill Size
UL Gland Size
PG13.5
PG21
UL Gland Size
Metric Gland Size
M20
Frame Size 1
Frame Size 2 & 3
M25
Metric
Flexible Conduit Hole Size
Frame Size 1
Frame Size 2 & 3
1.125in (28mm)
1.375in (35mm)
¾ in
1 in
21
27
UL rated ingress protection ("Type " ) is only met when cables are installed using a UL recognized bushing or fitting for a flexible-
conduit system which meets the required level of protection ("Type")
For conduit installations the conduit entry holes require standard opening to the required sizes specified per the NEC.
Not intended for rigid conduit system
Local Power Isolator Lock out
On the switched models the Local Power Isolator switch can be locked in the ‘Off’ position using a 20mm standard shackle padlock (not
supplied).
IP66 / Nema 12 Unit Lock Out
IP66 / Nema 4X Unit Lock Out
4.7. Removing the Terminal Cover
To access the connection terminals, the drive front cover needs to be removed as shown.
IP66 / NEMA 4X Units
Removing the 2 screws on the front of the product allows access to the connection terminals, as shown below.
19
5. Power Wiring
5.1. Grounding the Drive
This manual is intended as a guide for proper installation. ABB Drives Ltd cannot assume responsibility for the compliance or
the non-compliance to any code, national, local or otherwise, for the proper installation of this drive or associated equipment.
A hazard of personal injury and/or equipment damage exists if codes are ignored during installation.
This ACS255 contains high voltage capacitors that take time to discharge after removal of the main supply. Before working on
the drive, ensure isolation of the main supply from line inputs. Wait ten (10) minutes for the capacitors to discharge to safe
voltage levels. Failure to observe this precaution could result in severe bodily injury or loss of life.
Only qualified electrical personnel familiar with the construction and operation of this equipment and the hazards involved
should install, adjust, operate, or service this equipment. Read and understand this manual and other applicable manuals in
their entirety before proceeding. Failure to observe this precaution could result in severe bodily injury or loss of life.
5.1.1. Recommended installation for EMC compliance
Metal Back-Panel
Site Ground Bus-Bar bonded to Metal Back-Panel
panel which is bonded to main power ground.
RFI Filter
Option
Ensure Filter chassis is making metal-metal contact with
Mounting panel.
Avoid long parallel
runs of motor cables
with other cables
X
Twisted-Pair shielded cables for analog control and motor
feedback signals.
=/>100mm
Where control cables must cross power
cables make sure they are arranged at an
angle as near to 90 degrees as possible.
Whenever possible use Shielded motor cables-
maintaining shield as far as possible along the cable.
360° bonding
EMC cable gland
(Best-Practice)
(Shield to Motor
Chassis)
PE
PE
U V W
U V W
20
5.1.2. Grounding Guidelines
The ground terminal of each ACS255 should be individually connected DIRECTLY to the site ground bus bar (through the filter if installed).
ACS255 ground connections should not loop from one drive to another, or to, or from any other equipment. Ground loop impedance must
confirm to local industrial safety regulations. To meet UL regulations, UL approved ring crimp terminals should be used for all ground wiring
connections.
The drive Safety Ground must be connected to system ground. Ground impedance must conform to the requirements of national and local
industrial safety regulations and/or electrical codes. The integrity of all ground connections should be checked periodically.
5.1.3. Protective Earth Conductor
The Cross sectional area of the PE Conductor must be at least equal to that of the incoming supply conductor.
5.1.4. Safety Ground
This is the safety ground for the drive that is required by code. One of these points must be connected to adjacent building steel (girder, joist),
a floor ground rod, or bus bar. Grounding points must comply with national and local industrial safety regulations and/or electrical codes.
The safety ground terminal provides a grounding point for the motor cable shield. The motor cable shield connected to this terminal (drive
end) should also be connected to the motor frame (motor end). Use a shield terminating or EMI clamp to connect the shield to the safety
ground terminal.
5.1.5. Motor Ground
The motor ground must be connected to one of the ground terminals on the drive.
5.1.6. Ground Fault Monitoring
As with all inverters, a leakage current to earth can exist. The ACS255 is designed to produce the minimum possible leakage current while
complying with worldwide standards. The level of current is affected by motor cable length and type, the effective switching frequency, the
earth connections used and the type of RFI filter installed. If a GFCI (Ground Fault Current interrupter) is to be used, the following conditions
apply: -
The device must be suitable for protecting equipment with a DC component in the leakage current
Individual GFCI’s should be used for each ACS255
The ACS255 product range has input supply voltage surge suppression components fitted to protect the drive from line voltage transients,
typically originating from lightning strikes or switching of high power equipment on the same supply.
5.2. Wiring Precautions
Connect the ACS255 according to sections 5.3 and 5.4, ensuring that motor terminal box connections are correct. There are two connections in
general: Star and Delta. It is essential to ensure that the motor is connected in accordance with the voltage at which it will be operated. For
more information, refer to section 5.5.
Type MC continuous corrugated aluminium armor cable with symmetrical grounds or shielded power cable is recommended for the motor
cables if metallic conduit is not used.
The power cables must be rated for 75˚C (167˚F).
5.2.1. EMC Filters
WARNING! EMC filters should not be used when there is a risk that the phase to earth voltage could exceed the phase to
phase voltage, Typically IT (ungrounded) and corner-grounded TN systems, otherwise this may cause danger or damage to
the EMC filter.
21
5.3. Connection Diagram
5.3.1. IP66 (Nema 4X) Switched Units
Power Connections
Incoming Power Source
External Fuse
Optional Input Choke
Optional Input Filter
Internal Mains Disconnect
Optional Brake Resistor
Shielded Motor Cable
Relay Output
A
B
C
D
E
F
BR
+DC
G
I
Control Connections
Internal Forward / Off /
Reverse Switch
J
K
Internal Speed Control Pot
8
Analog Output
0 – 10 Volts
9
0 Volt
10
11
Relay Output
‘Drive READY’ = Closed
5.3.2. IP20 & IP66 (Nema 4X) Non- Switched Units
Power Connections
Incoming Power Source
External Mains Disconnect
External Fuse
Optional Input Choke
Optional Input Filter
Optional Brake Resistor
Shielded Motor Cable
Relay Output
A
B
C
D
E
F
+DC
BR
G
I
Control Connections
1
2
+ 24 Volt (100mA) User Output
Digital Input 1
Drive Run / Stop
Digital Input 2
Forward / Reverse
Digital Input 3
Analog / Preset Speed
+ 10 Volt Output
Analog Input 1
0 – 10 Volt
3
4
5
6
7
8
0 Volt
Analog Output
0 – 10 Volts
9
0 Volt
10
11
Relay Output
‘Drive READY’ = Closed
22
5.4. Drive & Motor Connections
For 1 phase supply, power should be connected to L1/L, L2/N. For 3 phase supplies power should be connected to L1, L2, L3. Phase sequence
is not important. The Motor should be connected to U, V, W
For drives that have a dynamic brake transistor an optional external braking resistor will need be connected to +DC and BR when required.
The brake resistor circuit should be protected by a suitable thermal protection circuit. The “–DC”, “+” and “BR” connections are blanked off by
plastic tabs when sent from the factory. The plastic tabs can be removed if/when required.
Size 1 Connections
IP20
IP66 (Nema 4X)
Size 2 & 3 Connections
IP20
IP66 (Nema 4X)
5.5. Motor Terminal Box Connections
Most general purpose motors are wound for operation on dual voltage supplies. This is indicated on the nameplate of the motor. This
operational voltage is normally selected when installing the motor by selecting either STAR or DELTA connection. STAR always gives the higher
of the two voltage ratings. Example Motor nameplate shown below (380V Delta illustrated):
23
5.6. Using the REV/Off/FWD Selector Switch (IP66 Switched Version Only)
By adjusting the parameter settings the ACS255 can be configured for multiple applications and not just for Forward or Reverse.
This could typically be for Hand/Off/Auto applications (also known as Local/Remote) for Industrial fan and pump industries.
Parameters to Set
Switch Position
Notes
1103
9902
Factory Default Configuration
Run Forward or Reverse with speed
controlled from the Local POT
Run forward with speed controlled form the
local POT
Run Reverse - disabled
Run Forward with speed controlled from the
Local POT
Run Reverse
STOP
STOP
Run Forward
Run Forward
0
0
STOP
STOP
STOP
STOP
STOP
STOP
0
0
0
0
5
5
5,7
1
Preset Speed 1
Run Reverse
Run in Auto
Run Forward
Run Forward
Preset Speed 1 provides a ‘Jog’ Speed set in
parameter 1202
Run Forward or Reverse with speed
controlled from the Local POT
6, 8
4
Run in Hand – Speed controlled from the
Local POT
Run in Auto 0 Speed controlled using Analog
input 2 e.g. from PLC with 4-20mA signal.
In Speed Control the speed is controlled from
the Local POT
In PI Control, Local POT controls PI set point
In Preset Speed Control, parameter 1202 sets
the Preset Speed
In PI Control, POT can control the PI set point
(Parameter 4010=1)
Run in Hand
Run in Speed
Control
Run in PI Control
Run in PI Control
1
Run in Preset Speed
Control
0, 2, 4,5,
8..12
Hand – speed controlled from the Local POT
Auto – Speed Reference from Modbus
Run in Hand
Run in Hand
STOP
STOP
Run in Auto
Run in Auto
3
3
6
3
Hand – Speed reference from Preset Speed 1
(Parameter 1202)
Auto – Speed Reference from Modbus
24
6. Control Wiring
6.1. Control Terminal Connections
Default Connections
Control Terminals
Description
1
2
+24V
DI1
+24V Output
Digital Input 1
Digital Input 2
+24V, 100mA.
Positive logic
“Logic 1” input voltage range: 8V … 30V DC
“Logic 0” input voltage range: 0V … 4V DC
3
DI2
Digital/Analog
Input 3
Digital: 8 to 30V
Analog: 0 to 10V, 0 to 20mA or 4 to 20mA
4
DI/AI 3
+10V
DI/AI4
COM
AO
5
+10V Output
+10V, 10mA, 1kΩ minimum
Digital/Analog
Input 4
Analog: 0 to 10V, 0 to 20mA or 4 to 20mA
Digital: 8 to 30V
6
7
0V
User ground connected to terminal 9
Analog Output /
Digital Output
Analog: 0 to 10V, 20mA maximum
Digital: 0 to 24V
8
9
AGND
ROC
0V
User ground connected to terminal 7
10
11
Relay Common
Relay Contact
RNO
Contact 255Vac, 6A / 30Vdc, 5A
6.2. RJ45 Data Connection
1
2
3
4
5
6
7
8
No Connection
No Connection
0 Volts
-RS485 (PC)
+RS485 (PC)
+24 Volt
-RS485 (Modbus RTU)
+RS485 (Modbus RTU)
For MODBUS RTU register map information
please refer to page 44
When using MODBUS control the Analog and
Digital Inputs can be configured as shown in
section 9.1.3
Warning:
This is not an Ethernet
connection. Do not connect
directly to an Ethernet port.
25
7. Operation
7.1. Managing the Keypad
The drive is configured and its operation monitored via the keypad and display.
Used to display real-time information, to access and exit
parameter edit mode and to store parameter changes.
NAVIGATE
(press for >1 second to toggle between status and
parameter mode)
Used to increase speed in real-time mode or to increase
parameter values in parameter edit mode
UP
Used to decrease speed in real-time mode or to decrease
parameter values in parameter edit mode
DOWN
RESET /
STOP
Used to reset a tripped drive.
When in Keypad mode is used to Stop a running drive.
When in keypad mode, used to Start a stopped drive or to
reverse the direction of rotation if bi-directional keypad
mode is enabled
START
7.2. Changing Parameters
“Status Mode”
H StoPH
PAr SH
Press for >1sec to enter
“Short/Long Parameter group
selection mode”
Timeout (60s)
PAr SH
Use to select Short “
PAr LH
”,
PAr AH
Long “
”, Advanced “
group parameters
“
Timeout (60s)
Press to exit “Short/Long Parameter group
selection mode” and save selection
“Parameter mode”
(End number flashing)
P9902H
Short Press to exit “Parameter
edit mode” and save selection
Press for >1s to return
to status mode
Use to select parameter for editing
P0000
Press to enter
parameter edit mode
(“Parameter edit mode”)
Use to change
parameter value
NOTE
When attempting to edit a parameter the drive must be stopped (not running), if not “L” will be shown on the left side of the display.
7.3. Resetting to Factory Default Settings
To reset factory default parameters, press
reset the drive.
,
and
for >2s. The display shows . Press the
button to acknowledge and
26
8. Quick Start-up and Control
8.1. Quick Start-up Terminal Control
When delivered, the drive is in the factory default state, meaning that it is set to operate in terminal control mode (Parameter 9902
DIGITAL INPUTS FUNCTION SELECT = 0 and 1103 PRIMARY COMMAND SOURCE MODE = 0) and all parameters have the default values as
indicated in section 10.
2. Connect a control switch between the control terminals 1 and 2 ensuring that the contact is open (drive disabled).
3. Connect a potentiometer (1kΩ min to 10 kΩ max) between terminals 5 and 7, and the wiper to terminal 6.
4. With the potentiometer set to zero, switch on the supply to the drive. The display will show .
5. Press and hold the navigate key for >1s to enter parameter view mode and enter motor data from motor nameplate into parameter
9905 MOTOR RATED VOLTAGE, 9906 MOTOR RATED CURRENT, and parameter 9907 MOTOR RATED FREQUENCY. Enter the rated
RPM (nameplate) of the motor in 9908 MOTOR RATED SPEED to allow the display of the estimated motor speed.
6. Close the control switch, terminals 1-2. The drive is now ‘enabled’ and the output frequency/speed are controlled by the
potentiometer. The display shows zero speed in Hz (.) with the potentiometer turned to minimum. If the display is not
showing Hz, change it using the
(Navigate) key.
7. Turn the potentiometer to maximum. The motor will accelerate to 60Hz (the default value of parameter 2008 MAXIMUM
FREQUENCY / SPEED LIMIT) under the control of the accelerating ramp time parameter 2202 ACCELERATION RAMP TIME. The
display shows 60Hz (.) at max speed.
8. To display motor current (A), briefly press the
9. To display estimated motor speed (RPM), briefly press the
(Motor nameplate speed (RPM) must be entered in 9908 Motor Rated Speed to display the estimated RPM).
10. To display power (Hp) briefly press the (Navigate) key a third time.
11. Press again to return to speed (Hz) display.
(Navigate) key.
(Navigate) key a second time.
To stop the motor, either turn the potentiometer back to zero or disable the drive by opening the control switch (terminals 1-2).
If the enable/disable switch is opened the drive will decelerate to stop at which time the display will show . If the potentiometer is
turned to zero with the enable/disable closed the display will show .(0.0Hz), if left like this for 60 seconds the drive will go into
standby mode, display shows , waiting for a speed reference signal.
27
8.2. Quick Start-up Keypad Control
To allow the ACS255 to be controlled from the keypad in a forward direction only, set parameter 1103 PRIMARY COMMAND SOURCE
MODE =1:
2. Connect a control switch between the control terminals 1 and 2 ensuring that the contact is open (drive disabled).
3. Switch on the supply to the drive, Press and hold the navigate key for > 1 to enter parameter view mode and set parameter 1103
Primary Command Source Mode = 1
4. Enable the drive by closing the switch between control terminals 1 & 2. The display will show .
5. Press the
6. Press
key. The display shows .. If the display is not showing Hz, change it using the
(Navigate) key.
to increase speed.
7. The drive will run forward, increasing speed until
is released.
The rate of acceleration is controlled by the setting of parameter 2202 ACCELERATION RAMP TIME, check this before starting.
8. Press
2203 DECELERATION RAMP TIME.
9. Press the key. The drive will decelerate to rest at the rate set in parameter 2203 DECELERATION RAMP TIME.
10. The display will finally show at which point the drive is disabled
11. To preset a target speed prior to enable, press the key while the drive is stopped. The display will show the target speed, use the
key to return the display to .
key will start the drive accelerating to the target speed.
to decrease speed. The drive will decrease speed until
is released. The rate of deceleration is limited by the setting in
&
keys to adjust as required then press the
12. Pressing the
To allow the ACS255 to be controlled from the keypad in a forward and reverse direction, set parameter 1103 PRIMARY COMMAND
SOURCE MODE =2:
13. Operation is the same as when parameter 1103 PRIMARY COMMAND SOURCE MODE =1 for start, stop and changing speed.
14. Press the
15. Press
key. The display changes to ..
to increase speed
16. The drive will run forward, increasing speed until
is released. Acceleration is limited by the setting in parameter 2202
ACCELERATION RAMP TIME. The maximum speed is the speed set in parameter 2008 MAXIMUM FREQUENCY / SPEED LIMIT.
17. To reverse the direction of rotation of the motor, press the
key again.
8.3. Drive Operating Displays.
Drive mains power applied, but no Enable or Run signal applied
Drive running, display shows output frequency (Hz)
Drive running, display shows motor current (Amps)
Drive Running, display shows motor power (kW)
Whilst the drive is running, the following displays
can be selected by briefly pressing the
button on the drive. Each press of the button will
cycle the display through to the next selection.
..
..
..
If the enable/disable switch isopened the drive will decelerate to stop at whichtimethe display will show If the
potentiometer is turned to zero with the enable/disable closed the display will show .. (0.0Hz), if left like this for 60
seconds the drive will go into standbymode,displayshows ,waiting foraspeedreferencesignal.
.
28
9. Application Macros
9.1.
Overview of macros
Application macros are pre-programmed parameter sets. While starting up the drive, the user selects the macro best suited for the
purpose with parameter 9902 DIGITAL INPUTS FUNCTION SELECT and 1103 PRIMARY COMMAND SOURCE MODE.
1103 (control Mode)
0 : Terminal Mode
Selected Speed Reference
Analog input 1
1 : Keypad Mode (uni-directional)
2 : Keypad Mode (bi-directional)
4 : Fieldbus Control
Digital Potentiometer
Digital Potentiometer
Speed reference via Fieldbus
PI controller output
5 : User PI mode
9.1.1. Terminal Mode 1103 PRIMARY COMMAND SOURCE MODE = 0.
9902
Digital input 1 (T2)
Open: Stop (disable)
Closed: Run (enable)
Open: Stop (disable)
Closed: Run (enable)
Digital input 2 (T3)
Digital input 3 (T4)
Analog input (T6)
Comments
Open : Forward run
Closed : Reverse run
Open: Analog speed ref
Closed : Preset speed 1/2
Open : Analog speed ref
Closed : Preset speed 1
Open: Preset speed 1
Closed : Preset speed 2
0
Analog input 1 reference
1
2
Analog input 1 reference
Digital Input 2
Digital Input 3
Preset Speed
4 Preset speeds selectable.
Analog input used as digital
input Closed status: 8V <
Vin < 30V
Open: Preset speeds 1-4
Closed : Max Speed
(parameter 2008)
Open
Closed
Open
Open
Open
Closed
Closed
Preset Speed 1
Preset Speed 2
Preset Speed 3
Preset Speed 4
External trip input :
Open: Trip,
Open: Stop (disable)
Closed: Run (enable)
Closed
Connect external motor
thermistor PTC type or
similar to digital input 3
Switches between analog
inputs 1 and 2
Closing digital inputs 1 and
2 together carries out a
fast stop (Parameter 2206)
Connect external motor
thermistor PTC type or
similar to digital input 3
Open: Stop (disable)
Closed: Run (enable)
Open : Analog speed ref
Closed : Preset speed 1
3
4
5
Analog input 1 reference
Closed: Run
Open: Stop (disable)
Closed: Run (enable)
Open : Analog input 1
Closed : Analog input 2
Analog input 2 reference Analog input 1 reference
Open: Fwd Stop
Closed: Fwd Run
Open: Reverse Stop
Closed: Reverse Run
Open : Analog speed ref
Analog input 1 reference
Closed : Preset speed 1
External trip input :
Open: Trip,
Closed: Run
External trip input :
Open: Trip,
Closed: Run
Open: Stop (disable)
Closed: Run (enable)
Open : Forward
Closed : Reverse
6
7
Analog input 1 reference
Analog input 1 reference
Closing digital inputs 1 and
2 together carries out a
fast stop (Parameter 2206)
Open: Stop (disable)
Closed: Fwd Run (enable)
Open: Stop (disable)
Closed: Rev Run (enable)
Digital Input 3
Open
Closed
Open
Closed
Analog Input 1
Open
Open
Closed
Closed
Preset Speed
Preset Speed 1
Preset Speed 2
Preset Speed 3
Preset Speed 4
Open: Stop (disable)
Closed: Run (enable)
Open : Forward
Closed : Reverse
8
9
Digital Input 3
Open
Closed
Open
Closed
Analog Input 1
Open
Open
Closed
Closed
Preset Speed
Preset Speed 1
Preset Speed 2
Preset Speed 3
Preset Speed 4
Closing digital inputs 1 and
2 together carries out a
fast stop (Parameter
2206)
Open: Stop (disable)
Closed: Forward Run
(enable)
Open: Stop (disable)
Closed: Reverse Run
(enable)
Normally Open (NO)
Momentary close to run
Normally Closed (NC)
Momentary open to stop
Open : Analog speed ref
Closed: Preset speed 1
10
11
Analog input 1 reference
Analog input 1 reference
Analog input 1 reference
Closing digital inputs 1 and
3 together carries out a
fast stop (Parameter 2206)
Normally Open (NO)
Momentary close to run
Normally Closed (NC)
Momentary open to stop
Normally Open (NO)
Momentary close to rev
Open: Stop (disable)
Closed: Run (enable)
Open: Fast Stop (disable)
Closed: Run (enable)
Open : Analog speed ref
Closed : Preset speed 1
12
NOTE
Negative Preset Speeds will be inverted if Run Reverse selected
9902=0 9902 = 1
9902=2
+24 Volt
+24 Volt
+24 Volt
Run (Enable)
For / Rev
Run (Enable)
Analog / Preset
Preset1 / Preset2
+ 10 Volts
Run (Enable)
Preset Speeds 1 – 4
Select
Analog / Preset
+ 10 Volts
Reference
0 Volts
Reference
Preset / Max
0 Volts
Analog speed input with 1 preset speed and
fwd/rev switch
Analog speed input with 2 preset speeds
4 preset speeds and max speed select switch.
Effectively giving 5 preset speeds
29
9902=3
9902=4
9902=11
+24 Volt
+24 Volt
+24 Volt
Run (Enable)
Analog / Preset 1
External Trip
+ 10 Volts
Run (Enable)
Run Forward
Stop
Local / Remote
(Hand / Auto)
Remote (Auto)
Reference
Run Reverse
+ 10 Volts
Reference
+ 10 Volts
Local (Hand)
Reference
Reference
0 Volts
0 Volts
0 Volts
Analog speed input with 1 preset speed and
motor thermistor trip
Local or remote analog speeds
(2 analog inputs)
Push button fwd/rev/stop with fast stop using
2nd deceleration ramp
9.1.2. Keypad Mode 1103 PRIMARY COMMAND SOURCE MODE = 1 or 2.
9902 Digital input 1 (T2)
Digital input 2 (T3)
Digital input 3 (T4)
Analog input (T6)
Comments
0, 1,
5,
8..12
Open: Stop (disable)
Closed: Run (enable)
Closed : remote UP push-
button
Closed : remote DOWN
push-button
Open : Forward
+24V : Reverse
Open: Stop (disable)
Closed: Run (enable)
Closed : remote UP push-
button
Closed : remote DOWN
push-button
Open : Keypad speed ref
+24V : Preset speed 1
2
Connect external motor
thermistor PTC type or similar
to digital input 3
Open: Stop (disable)
Closed: Run (enable)
Closed : remote UP push-
button
External trip input :
Open: Trip, Closed: Run
Closed : remote DOWN
push-button
3
Open: Stop (disable)
Closed: Run (enable)
Closed : remote UP push-
button
Open : Keypad speed ref
Closed : Analog input 1
4
Analog input 1
Connect external motor
thermistor PTC type or similar
to digital input 3
Open: Stop (disable)
Closed: Run (enable)
Open : Forward run
Closed : Reverse run
External trip input :
Open: Trip, Closed: Run
Open : Keypad speed ref
+24V : Preset speed 1
6
Closing digital inputs 1 and 2
together carries out a fast
stop (2206)
Open: Forward Stop
Closed: Forward Run
Open: Reverse Stop
Closed: Reverse Run
External trip input :
Open: Trip, Closed: Run
Open : Keypad speed ref
+24V : Preset speed 1
7
9902=0
+24 Volt
Run (Enable)
Increase Speed
Reduce Speed
+ 10 Volts
Forward / Reverse
0 Volts
Remote push button speed control with
fwd/rev
By default if the enable signal is present the drive will not Enable until the START button is pressed. To automatically enable the drive when the
enable signal is present set Parameter 1100 KEYPAD MODE RESTART FUNCTION = 2 or 3. This then disables the use of the START & STOP buttons
NOTE
9.1.3. Modbus Control Mode 1103 PRIMARY COMMAND SOURCE MODE = 4.
9902 Digital input 1 (T2)
Digital input 2 (T3)
Digital input 3 (T4)
Analog input (T6)
Comments
0..2,
4..5,
8..12
Run and stop commands given via
the RS485 link and Digital input 1
must be closed for the drive to run.
Connect external motor thermistor
PTC type or similar to digital input 3
Master Speed Ref - start and stop
controlled via RS485. Keypad Speed
Ref - drive auto runs if digital input 1
closed, depending on Parameter
1100 setting
Open: Stop (disable)
Closed: Run (enable)
No effect
No effect
No effect
Open: Stop (disable)
Closed: Run (enable)
Open: Stop (disable)
Closed: Run (enable)
Open : Master speed ref
Closed : Preset speed 1
Open : Master speed ref
Closed : Analog input
External trip input :
Open: Trip, Closed: Run
External trip input :
Open: Trip, Closed: Run
3
No effect
6
Analog input reference
Open: Stop (disable)
Closed: Run (enable)
Open : Master speed ref
Closed : keypad speed ref Open: Trip, Closed: Run
External trip input :
7
No effect
For further information on the MODBUS RTU Register Map information and communication setup please refer to section 11.
30
9.1.4. PI Mode 1103 PRIMARY COMMAND SOURCE MODE = 5.
9902
Digital input 1 (T2)
Digital input 2 (T3)
Digital input 3 (T4)
Analog input (T6)
Comments
Analog Input 1 can provide an
adjustable PI setpoint, by
setting Parameter 4010 = 1
Analog Input 1 can provide an
adjustable PI setpoint, by
setting Parameter 4010 = 1
Connect external motor
thermistor PTC type or similar
to digital input 3
0, 2, Open: Stop (disable)
9..12 Closed: Run (enable)
Open : PI control
Closed : Preset speed 1
PI feedback analog input
Analog input 1
Open: Stop (disable)
Closed: Run (enable)
Open : PI control
Closed : Analog input 1
1
PI feedback analog input
Analog input 1
Open: Stop (disable)
3, 7
Open : PI control
Closed : Preset speed 1
External trip input :
Open: Trip, Closed: Run
PI feedback analog input
Closed: Run (enable)
Normally Open (NO)
Momentary close to run
Normally Open (NO)
Momentary close to run
Normally Open (NO)
Momentary close to run
Normally Closed (NC)
Momentary open to stop
Normally Closed (NC)
Momentary open to stop
Normally Closed (NC)
Momentary open to stop
Normally Open (NO)
Momentary close to run
Normally Open (NO)
Momentary close to run
Normally Open (NO)
Momentary close to run
Analog Input 1 can provide an
adjustable PI setpoint, by
setting Parameter 4010 = 1
4
PI Feedback Analog Input
Analog Input 1
Open: PI Control
Closed: Preset Speed 1
Open: External Trip
Closed: Run
5
PI Feedback Analog Input
PI Feedback Analog Input
6
Open: Stop (disable)
Closed: Run (enable)
Open : Forward run
Closed : Reverse run
8
PI feedback analog input
Analog input 1
PI Mode 1103=5, 9902=0
PI Mode 1103=5, 9902=1
PI Mode 1103=5, 9902=3
+24 Volt
+24 Volt
+24 Volt
Run (Enable)
Run (Enable)
PI / Local (Hand)
PI Feedback
+10 Volt
Run (Enable)
PI / Preset Speed 1
PI / Preset Speed 1
External Trip
PI Feedback
Local (Hand) Ref
PI Feedback
0 Volt
0 Volt
0 Volt
Remote closed loop PI feedback control
with Local Preset speed 1
Remote closed loop PI feedback control with
Local Analog speed input
Remote closed loop PI feedback control with
Local Preset speed 1 and motor thermistor
trip
NOTE
By default the PI reference is set for a digital reference level set in Parameter 4011 PI DIGITAL REFERENCE (SETPOINT).
When using an Analog reference set Parameter 4010 PI DIGITAL REFERENCE (SETPOINT)= 1 (analog) and connect reference signal to analog input
1 (T6).
The default settings for proportional gain (parameter 4001), integral gain (Parameter 4002) and feedback mode (Parameter 4005) are suitable for
most fan and pump applications.
The analog reference used for PI controller can also be used as the local speed reference when parameter 9902 DIGITAL INPUTS FUNCTION
SELECT =1.
31
10. Parameters
10.1. Parameter Structure
The parameters within the drive are split into 3 groups, group 1 is titled “Short Parameter mode” displayed as “Par S” on the
drive display, group 2 is titled “Long Parameter mode” displayed as “Par L” on the drive display and group 3 is titled
“Advanced Parameter mode” displayed as “Par A”.
“Par S” group brings together the most commonly used parameters to aid quick setup.
“Par L” group includes all of the drive parameters (except those in “Par-A” group.
“Par A” group includes the drives advanced functions.
10.1.1. Group Navigation.
“Status Mode”
H StoPH
PAr SH
Press for >1sec to enter
“Short/Long Parameter group
selection mode”
Timeout (60s)
PAr SH
Use to select Short “
PAr LH
”,
PAr AH
Long “
”, Advanced “
group parameters
“
Press to exit “Short/Long Parameter group
selection mode” and save selection
“Parameter mode”
(End number flashing)
P9902H
10.1.2. Parameter Structure table.
PAr LH
PAr AH
PAr SH
Parameter No.
Parameter No.
Parameter No.
2017
2105
2106
2301
9902
9905
9906
9907
0401
1103
1202
1203
1204
1301
2008
2102
2202
0000
0401
1100
1103
1202
1203
1204
1205
2605
9903
9910
11201
11203
11206
3400
4001
4002
4005
4010
4011
4016
5302
9902
9905
9906
9907
9908
32
10.2. Parameters in the Short parameter mode
The following table describes the parameters that are visible in the Short parameter mode. See page 25 for how to select the
Parameters in the Short parameter mode
No.
Name/Value
Description
Def
99 START-UP DATA
Application macros.
9902
9905
DIGITAL INPUTS
FUNCTION SELECT
MOTOR RATED VOLTAGE
Defines the function of the digital inputs depending on the control mode setting in
This parameter should be set to the rated (nameplate) voltage of the motor (Volts).
1
Drive Rating
Dependent
110V/230V rated drives
Voltage
0…255V
Note : The stress on the motor insulation is always dependent on the drive supply voltage.
This also applies in the case where the motor voltage rating is lower than the rating of the
drive and the supply of the drive.
400V rated drives
0…500V
9906
9907
MOTOR RATED CURRENT
This parameter should be set to the rated (nameplate) current of the motor.
Drive Rating
Dependent
0.2*drive rated output
current…1.0*drive rated
output current
MOTOR RATED
FREQUENCY
Current
This parameter should be set to the rated (nameplate) frequency of the motor
60Hz
25…500Hz
Frequency
04 FAULT HISTORY
Fault history (read only)
0401
TRIP HISTORY LOG
The drive can accept a variety of references in addition to the conventional analog input,
potentiometer and keypad signals.
-
11 REFERENCE SELECT
1103
PRIMARY COMMAND
SOURCE MODE
0: Terminal
Control
0: TERMINAL CONTROL.
The drive responds directly to signals applied to the control terminals.
1: UNI-DIRECTIONAL
KEYPAD CONTROL
2: BI-DIRECTIONAL
KEYPAD CONTROL.
3: MODBUS NETWORK
CONTROL.
The drive can be controlled in the forward direction only using an external or remote
Keypad
The drive can be controlled in the forward and reverse directions using an external or
remote Keypad. Pressing the keypad START button toggles between forward and reverse.
Control via Modbus RTU (RS485) using the internal accel / decel ramps
4 : MODBUS NETWORK
CONTROL.
Control via Modbus RTU (RS485) interface with accel / decel ramps updated via Modbus
5 : PI CONTROL
User PI control with external feedback signal
6 : PI ANALOG
PI control with external feedback signal and summation with analog input 1
SUMMATION CONTROL.
12 CONSTANT SPEEDS
Constant speeds. Constant speed activation overrides the external speed reference.
Constant speed selections are ignored if the drive is in the local control mode.
terminals.
Preset Speeds / Frequencies selected by digital inputs depending on the setting of
Parameter 9902 DIGITAL INPUTS FUNCTION SELECT.
If Parameter 9908 MOTOR RATED SPEED = 0, the values are entered as Hz. If Parameter
9908 > 0, the values are entered as Rpm.
Setting a negative value will reverse the direction of motor rotation.
1202
1203
PRESET / JOG FREQUENCY Defines constant speed 1 (that is the drive output frequency)
/ SPEED 1
5.0Hz/RPM
2007…-2008
Output Frequency
PRESET / JOG FREQUENCY Defines constant speed 2 (that is the drive output frequency)
/ SPEED 2
10.0Hz/RPM
2007…-2008
Output Frequency
1204
PRESET / JOG FREQUENCY Defines constant speed 3 (that is the drive output frequency)
/ SPEED 3
25.0Hz/RPM
2007…-2008
Output Frequency
33
Def
Parameters in the Short parameter mode
No.
13 ANALOG INPUTS
1301 ANALOG INPUT 1 OFFSET
Name/Value
Description
Analog input signal offset
Sets an offset, as a percentage of the full scale range of the input, which is applied to the
analog input signal
0.0%
-500…500 %
Value in percent of the full scale range of the input
Example: If the analog input signal format is 0-10V, offset = 20% .
An analog input signal level of 7 Volts gives the following result :-
Analog input level (%) = 7/10 = 70%
Result = 70-20 (%) = 50%
20 LIMITS
2008 MAXIMUM FREQUENCY /
Maximum frequency
Maximum output frequency or motor speed limit – Hz or rpm.
If parameter 9908 MOTOR RATED SPEED >0, the value entered / displayed is in Rpm
Maximum frequency
60.0 Hz
SPEED LIMIT
2007…500.0 Hz
21 START/STOP
Stop mode of the motor
2102 STOP MODE
Selects the motor stop function
0 = Ramp
to stop
0 : RAMP TO STOP
When the enable signal is removed, the drive will ramp to stop, with the rate controlled by
parameter 2203 DECEL RAMP TIME as described above. In this mode, the drive brake
transistor is disabled
1 : COAST TO STOP
When the enable signal is removed, the drive output is immediately disabled, and the motor
will coast (freewheel) to stop. If the load can continue to rotate due to inertia, and the drive
may possibly be re-enabled whilst the motor is still rotating, the spin start function
(Parameter 2101 SPIN START ENABLE) should be enabled. In this mode, the drive brake
transistor is disabled.
2 : RAMP TO STOP
3 : COAST TO STOP
When the enable signal is removed, the drive will ramp to stop, with the rate controlled by
Parameter 2203 DECEL RAMP TIME as described above. The ACS255 Brake chopper is also
enabled in this mode.
When the enable signal is removed, the drive output is immediately disabled, and the motor
will coast (freewheel) to stop. If the load can continue to rotate due to inertia, and the drive
may possibly be re-enabled whilst the motor is still rotating, the spin start function
(Parameter 2101 SPIN START ENABLE) should be enabled. The drive brake chopper is enabled
in this mode, however it will only activate when required during a change in the drive
frequency setpoint, and will not activate when stopping.
22 ACCEL/DECEL
Acceleration and deceleration times
2202 ACCELERATION RAMP
TIME
Acceleration ramp time from 0 to base speed (Parameter 9907 MOTOR RATED FREQUENCY)
in seconds.
Time
5.0 s
5.0 s
0.00…600.0 s
2203 DECELERATION RAMP
TIME
Deceleration ramp time from base speed (Parameter 9907 MOTOR RATED FREQUENCY) to
standstill in seconds. When set to zero, fastest possible ramp time without trip is activated.
0.00…600.0 s
Time
34
10.3. Read Only Status parameters
10.3.1. Read Only Status parameter access and navigation.
The user must be in the Long Parameter group to gain access to the Read only status parameters, See section 10.1.1 for how to navigate to the
Long Parameter group.
In the Long Parameter Group when the user scrolls to parameter “0000”, pressing
required Read only status parameter (as listed in the table above). Pressing
only status parameter.
will display “0104”, the User can then scroll to the
once more will then display the value of that particular Read
For those parameters which have multiple values (e.g. software ID parameter 3301), pressing the
and
keys will display the different
values within that parameter.
Pressing
returns to the next level up. If
is then pressed again (without pressing
or ), the display changes to the next level up
(main parameter level, i.e. Parameter “0000”).
The following table includes the descriptions of all Read Only status parameters.
Actual signals
No.
Name/Value
Description
01 OPERATING DATA
Basic signals for monitoring the drive (read-only).
For selection of an actual signal to be displayed on the control panel, see parameter 3405 DISPLAY
SCALING SOURCE.
0102
0104
0107
0109
0110
ROTOR SPEED (ESTIMATED)
MOTOR CURRENT
DC BUS VOLTAGE
APPLIED MOTOR VOLTAGE
INTERNAL HEATSINK
TEMPERATURE
In vector control mode, this parameter displays the estimated rotor speed of the motor.
8 most recent values prior to trip, updated every 255ms
Displays the instantaneous DC Bus Voltage internally within the drive in V DC. (0…1000V dc)
Displays the instantaneous output voltage from the drive to the motor V AC. (0…600V AC)
Temperature of heatsink in °C (-20 … 100 °C)
0111
0115
0120
0121
0126
0140
0145
0160
0183
0188
SPEED REFERENCE INPUT
Displayed in Hz if Parameter 9908 MOTOR RATED SPEED = 0, otherwise displayed in RPM. (-2008 …
2008)
Total number of kWh/MWh consumed by the drive.
kWh/MWh METER
ANALOG INPUT 1 APPLIED
SIGNAL LEVEL
ANALOG INPUT 2 APPLIED
SIGNAL LEVEL
Displays the signal level applied to analog input 1 (Terminal 6) in % after scaling and offsets have
been applied.
Displays the signal level applied to analog input 2 (Terminal 4) in % after scaling and offsets have
been applied.
Displays the output level of the PI Controller in %.
PI CONTROLLER OUTPUT
HOURS RUN METER
Not affected by resetting factory default parameters.
(0 to 99 999 hours)
8 most recent values prior to trip, updated every 500ms.
(-20 … 120 °C)
Binary value.
Displays the status of the drive inputs, starting with the left hand side digit = Digital Input 1 etc.
Displays the level of ripple present on the DC Bus Voltage in VDC. This parameter is used by the drive
for various internal protection and monitoring functions.
Displays the amount of time in hours and minutes that the ACS255 has operated for during its
lifetime with a heatsink temperature in excess of 85°C. This parameter is used by the ACS255 for
various internal protection and monitoring functions. (HH:MM:SS)
THERMISTOR TEMPERATURE
LOG
DIGITAL INPUT STATUS
DC BUS VOLTAGE RIPPLE LEVEL
OPERATING TIME
ACCUMULATED WITH
HEATSINK TEMPERATURE
ABOVE 85°C
0189
0190
OPERATING TIME
Displays the amount of time in hours and minutes that the ACS255 has operated for during its
ACCUMULATED WITH AMBIENT lifetime with an ambient temperature in excess of 80°C. This parameter is used by the ACS255 for
TEMPERATURE ABOVE 80°C
DRIVE INTERNAL COOLING FAN
TOTAL OPERATING TIME
various internal protection and monitoring functions. (HH:MM:SS)
Displays the total operating time of the ACS255 internal cooling fans. The first value shown is the
number of hours. Pressing the Up key will display the minutes and seconds. This is used for scheduled
maintenance information (HH:MM:SS)
0192
0193
0194
DC BUS VOLTAGE RIPPLE LOG
(22ms) (V DC)
HEATSINK TEMPERATURE LOG
(30s) (°C)
AMBIENT TEMPERATURE LOG
(30s) (°C)
8 most recent values prior to trip, updated every 22ms.
8 most recent values prior to trip, updated every 30s.
8 most recent values prior to trip, updated every 30s.
35
04 FAULT HISTORY
Fault history (read-only)
0402
0406
0415
RUN TIME SINCE LAST TRIP (1)
Run-time clock stopped by drive disable (or trip), reset on next enable only if a trip occurred. Reset
also on next enable after a drive power down. (0 to 99 999 hours)
DC BUS VOLTAGE LOG
8 most recent values prior to trip, updated every 255ms. (0 … 1000V)
RUN TIME SINCE LAST TRIP (2)
Run-time clock stopped by drive disable (or trip), reset on next enable only if a trip occurred (under-
volts not considered a trip) – not reset by power down / power up cycling unless a trip occurred
prior to power down.( 0 to 99 999 hours)
0416
0417
RUN TIME SINCE LAST DISABLE
Run-time clock stopped on drive disable, value reset on next enable. (0 to 99 999 hours)
DRIVE EFFECTIVE SWITCHING
FREQUENCY
Actual drive effective output switching frequency. This value maybe lower than the selected
frequency in parameter 2606 EFFECTIVE SWITCHING FREQUENCY if the drive is too hot. The drive
will automatically reduce the switching frequency to prevent an over temperature trip and maintain
operation. (4 to 32 kHz)
33 INFORMATION
Firmware package version, serial number etc..
3301
SOFTWARE ID, IO & MOTOR
CTRL
e.g. “1.00”, “47AE”
Version number and checksum.
“1” on LH side indicates I/O processor,
“2“ indicates motor control
3303
3304
DRIVE SERIAL NUMBER
DRIVE IDENTIFIER
000000 … 999999
00-000 … 99-999
Unique drive serial number e.g. 540102 / 32 / 005
Drive rating (Drive rating, drive type e.g. 0.37, 1 230,3P-out)
36
10.4. Parameters in the Long parameter mode
The following table includes the complete descriptions of all parameters that are visible only in the Long parameter mode. See page 31
for how to select the parameter mode.
Parameters in the Long parameter mode
Index Name/Selection
0000 Read only parameters access
Description
Press the
Def
-
button when in this parameter to access the read only parameters as listed
on page 34.
04
FAULT HISTORY
Fault history (read-only)
0401
TRIP HISTORY LOG
Displays the last four fault codes for the drive. Refer to page 50
for further information. Press UP or DOWN to step through all four. The most recent trip is
always displayed first. The Under Voltage (F0006) trip is only stored once.
The drive can accept a variety of references in addition to the conventional analog input,
potentiometer and keypad signals.
-
11
REFERENCE SELECT
1100
KEYPAD MODE RESTART
FUNCTION
This parameter is active only when operating in Keypad Control Mode (parameter 1103
PRIMARY COMMAND SOURCE MODE = 1 or 2).
1 :
PREVIOUS
SPEED,
KEYPAD
START
0 MINIMUM SPEED,
KEYPAD START
1 : PREVIOUS SPEED,
KEYPAD START
Keypad Start and Stop keys are active, and control terminals 1 and 2 must be linked
together.The drive will always start at the Minimum Frequency / Speed (parameter 2007 )
Keypad Start and Stop keys are active, and control terminals 1 and 2 must be linked
together.
The drive will always start at the last operating Frequency / Speed
Allows the drive to be started from the control terminals directly, and the keypad Start and
Stop keys are ignored.
2 : MINIMUM SPEED,
TERMINAL ENABLE
The drive will always start at the Minimum Frequency / Speed (parameter 2007)
Allows the drive to be started from the control terminals directly, and the keypad Start and
Stop keys are ignored. The drive will always start at the last operating Frequency / Speed.
3 : PREVIOUS SPEED,
TERMINAL ENABLE
PRIMARY COMMAND
SOURCE MODE
1103
0: Terminal
Control
0: TERMINAL CONTROL.
1: UNI-DIRECTIONAL
KEYPAD CONTROL
2: BI-DIRECTIONAL
KEYPAD CONTROL.
3: MODBUS NETWORK
CONTROL.
The drive responds directly to signals applied to the control terminals.
The drive can be controlled in the forward direction only using an external or remote
Keypad
The drive can be controlled in the forward and reverse directions using an external or
remote Keypad. Pressing the keypad START button toggles between forward and reverse.
Control via Modbus RTU (RS485) using the internal accel / decel ramps
4 : MODBUS NETWORK
CONTROL.
Control via Modbus RTU (RS485) interface with accel / decel ramps updated via Modbus
5 : PI CONTROL
User PI control with external feedback signal
6 : PI ANALOG
PI control with external feedback signal and summation with analog input 1
SUMMATION CONTROL.
12
CONSTANT SPEEDS
Constant speeds. Constant speed activation overrides the external speed reference.
Constant speed selections are ignored if the drive is in the local control mode.
terminals.
Preset Speeds / Frequencies selected by digital inputs depending on the setting of
Parameter 9902 DIGITAL INPUTS FUNCTION SELECT.
If Parameter 9908 MOTOR RATED SPEED = 0, the values are entered as Hz. If Parameter
9908 > 0, the values are entered as Rpm.
Setting a negative value will reverse the direction of motor rotation.
1202
1203
1204
1205
PRESET / JOG FREQUENCY
/ SPEED 1
2007…-2008
PRESET / JOG FREQUENCY
/ SPEED 2
2007…-2008
PRESET / JOG FREQUENCY
/ SPEED 3
2007…-2008
PRESET / JOG FREQUENCY
/ SPEED 4
Defines constant speed 1 (that is the drive output frequency)
0.0
Hz/RPM
Output Frequency
Defines constant speed 2 (that is the drive output frequency)
0.0
Hz/RPM
Output Frequency
Defines constant speed 3 (that is the drive output frequency)
0.0
Hz/RPM
Output Frequency
Defines constant speed 4 (that is the drive output frequency)
0.0
Hz/RPM
2007…-2008
Output Frequency
37
Parameters in the Long parameter mode
Index Name/Selection Description
13 ANALOG INPUTS
Def
1300 ANALOG INPUT 1 SIGNAL
Selects the type of reference source into terminal 6.
FORMAT
0 to 10 Volt Signal(Uni-polar).The drive will remain at 0.0Hz if the analog reference after
scaling and offset are applied is <0.0%.
0 to 10 Volt Signal (Bi-polar). The drive will operate the motor in the reverse direction of
rotation if the analog reference after scaling and offset are applied is <0.0%
0 to 20mA Signal
4 to 20mA Signal, the ACS255 will trip and show the fault code if the signal level falls
below 3mA
4 to 20mA Signal, the ACS255 will ramp to stop if the signal level falls below 3mA
20 to 4mA Signal, the ACS255 will trip and show the fault code if the signal level falls
below 3mA
20 to 4mA Signal, the ACS255 will ramp to stop if the signal level falls below 3mA
1301 ANALOG INPUT 1 OFFSET Sets an offset, as a percentage of the full scale range of the input, which is applied to the
0.0%
analog input signal
-500…500 %
Value in percent of the full scale range of the input
Example: If the analog input signal format is 0-10V, offset = 20% .
An analog input signal level of 7 Volts gives the following result :-
Analog input level (%) = 7/10 = 70%
Result = 70-20 (%) = 50%
1302
1304
ANALOG INPUT 1 SCALING Scales the analog input by this factor, (as a percentage of the full scale range of this input).
100.0
0.0…2000.0 %
Example: If parameter 1300 ANALOG INPUT 1 FORMAT is set for 0 – 10V, and the scaling
factor is set to 200.0%, a 5 volt input will result in the drive running at maximum speed as set
in parameter 2008 MAX SPEED LIMIT
ANALOG INPUT 2 SIGNAL
FORMAT
Selects the type of reference source into terminal 4.
0 to 10 Volt Signal
0 to 20mA Signal
4 to 20mA Signal, the ACS255 will trip and show the fault code if the signal level falls
below 3mA
4 to 20mA Signal, the ACS255 will ramp to stop if the signal level falls below 3mA
20 to 4mA Signal, the ACS255 will trip and show the fault code if the signal level falls
below 3mA
20 to 4mA Signal, the ACS255 will ramp to stop if the signal level falls below 3mA
14
RELAY OUTPUTS
Status information indicated through relay output and relay operating delays
1401
OUTPUT RELAY FUNCTION Selects the function assigned to the relay output. The relay has two output terminals, Logic 1
1 : Drive
READY
SELECT
indicates the relay is active, and therefore terminals 10 and 11 will be linked together.
0 : DRIVE ENABLED
(RUNNING)
Logic 1 when the motor is enabled
1 : DRIVE READY
Logic 1 when power is applied to the drive and no fault exists
2 : AT TARGET FREQUENCY Logic 1 when the output frequency matches the setpoint frequency
(SPEED)
3: DRIVE TRIPPED
Logic 1 when the drive is in a fault condition
4 : OUTPUT FREQUENCY
>= LIMIT
Logic 1 when the output frequency exceeds the adjustable limit set in 3200 RELAY
THRESHOLD LEVEL
5 : OUTPUT CURRENT >=
LIMIT
Logic 1 when the motor current exceeds the adjustable limit set in 3200 RELAY THRESHOLD
LEVEL
6 : OUTPUT FREQUENCY <
LIMIT
Logic 1 when the output frequency is below the adjustable limit set in 3200 RELAY
THRESHOLD LEVEL
7 : OUTPUT CURRENT <
LIMIT
Logic 1 when the motor current is below the adjustable limit set in 3200 RELAY THRESHOLD
LEVEL
38
Parameters in the Long parameter mode
Index Name/Selection
Description
Def
15
ANALOG/DIGITAL
OUTPUTS
Analog output signal processing
1501
ANALOG OUTPUT
FUNCTION SELECT
Selects the type of output signal information indicated from terminal 8.
Note :
When using settings 0 – 7 the output is a digital format (Logic 1 = 24V).
When using settings 8-9 the output is an analog format.
Logic 1 when the ACS255 is enabled (Running)
8 : OUTPUT
FREQUENCY
(MOTOR
SPEED).
0 : DRIVE ENABLED
(RUNNING).
1 : DRIVE READY.
Logic 1 When no Fault condition exists on the drive
2 : AT TARGET FREQUENCY Logic 1 when the output frequency matches the setpoint frequency
(SPEED).
3: DRIVE TRIPPED.
Logic 1 when the drive is in a fault condition
4 : OUTPUT FREQUENCY
>= LIMIT
Logic 1 when the output frequency exceeds the adjustable limit set in parameter 3200
RELAY THRESHOLD LEVEL
5 : OUTPUT CURRENT >=
LIMIT
Logic 1 when the motor current exceeds the adjustable limit set in parameter 3200 RELAY
THRESHOLD LEVEL
6 : OUTPUT FREQUENCY <
LIMIT
Logic 1 when the output frequency is below the adjustable limit set in parameter 3200
RELAY THRESHOLD LEVEL
7 : OUTPUT CURRENT <
LIMIT.
Logic 1 when the motor current is below the adjustable limit set in parameter 3200 RELAY
THRESHOLD LEVEL
8 : OUTPUT FREQUENCY
(MOTOR SPEED).
9 : OUTPUT (MOTOR)
CURRENT.
0 to parameter 2008 MAXIMUM FREQUENCY / SPEED LIMIT
0 to 200% of parameter 9906 MOTOR RATED CURRENT
16
SYSTEM CONTROLS
Parameter lock etc.
1602
PARAMETER ACCESS
UNLOCK
0…65535
If Parameter 1603 has had a value entered, then the matching value needs to be entered
here in order to give read-write access to the parameters.
0
0
1603
PARAMETER ACCESS CODE To make all parameters Read only, enter a value in this parameter.
DEFINITION
0…65535
20 LIMITS
Drive operation limits
2007
2008
2020
MINIMUM FREQUENCY /
SPEED LIMIT
0.0 HZ…2008
MAXIMUM FREQUENCY /
SPEED LIMIT
Minimum output frequency or motor speed limit – Hz or rpm.
If parameter 9908 MOTOR RATED SPEED >0, the value entered / displayed is in Rpm
Minimum frequency
Maximum output frequency or motor speed limit – Hz or rpm.
If parameter 9908 MOTOR RATED SPEED >0, the value entered / displayed is in Rpm
Maximum frequency
0.0 Hz
60.0 Hz
2007…500.0 Hz
BRAKE CHOPPER ENABLE
0 :
DISABLED
0 : DISABLED
1 : ENABLED WITH
Enables the internal brake chopper with software protection for a 200W continuous rated
resistor
Enables the internal brake chopper without software protection. An external thermal
protection device should be fitted.
SOFTWARE PROTECTION.
2 : ENABLED WITHOUT
SOFTWARE PROTECTION.
21 START/STOP
Start and Stop modes of the motor
2101 FLYING START (Size E2 &
Starting the drive connected to a rotating motor.
0 : Disabled
E3 ONLY) / DC INJECTION
TIME ON START (Size E1
ONLY)
0 : DISABLED
1 : ENABLED.
When enabled, on start up the drive will attempt to determine if the motor is already
rotating, and will begin to control the motor from its current speed. A short delay may be
observed when starting motors which are not turning/On Size E1 only this parameter Sets
a time for which DC current is injected into the motor to ensure it is stopped when the
drive is enabled.
39
Parameters in the Long parameter mode
Index Name/Selection
Description
Def
2102 STOP MODE
Selects the motor stop function
0 : RAMP
TO STOP
0 : RAMP TO STOP
When the enable signal is removed, the drive will ramp to stop, with the rate controlled by
parameter 2203 DECEL RAMP TIME as described above. If the mains supply is lost, the drive
will try to continue running by reducing the speed of the load, and using the load as a
generator.
1 : COAST TO STOP
2 : RAMP TO STOP
When the enable signal is removed, or if the mains supply is lost, the motor will coast
(freewheel) to stop
When the enable signal is removed, the drive will ramp to stop, with the rate controlled by
parameter 2203 DECELERATION RAMP TIME. If the mains supply is lost the drive will ramp to
stop using parameter 2206 2nd DECELERATION RAMP TIME (FAST STOP) (decel ramp with
dynamic brake control).
3 : COAST TO STOP
When the enable signal is removed, the drive output is immediately disabled, and the motor
will coast (freewheel) to stop. If the load can continue to rotate due to inertia, and the
drive may possibly be re-enabled while the motor is still rotating, the spin start function
(Parameter 2101 SPIN START ENABLE) should be enabled. The drive brake chopper is enabled
in this mode, however it will only activate when required during a change in the drive
frequency setpoint, and will not activate when stopping.
2104 DC INJECTION TIME ON
Defines the time for which a DC current is injected into the motor once the output frequency 0.0
STOP
reaches 0.0Hz. The voltage level is the same as the boost level set in parameter 2603.
0.0…25.0 s
2108 TERMINAL MODE RESTART Defines the behavior of the drive relating to the enable digital input and also configures the
FUNCTION
Automatic Restart function.
Following Power on or reset, the drive will not start if Digital Input 1 remains closed. The
Input must be closed after a power on or reset to start the drive.
Following a Power On or Reset, the drive will automatically start if Digital Input 1 is closed.
Following a trip, the drive will make up to 5 attempts to restart at 20 second intervals. The
drive must be powered down to reset the counter. The numbers of restart attempts are
counted, and if the drive fails to start on the final attempt, the drive will fault and will require
the user to manually reset the fault.
to
22 ACCEL/DECEL
Acceleration and deceleration times
2202 ACCELERATION RAMP
TIME
Acceleration ramp time from 0 to base speed (Parameter 9907 MOTOR RATED FREQUENCY)
in seconds.
Time
5.0 s
5.0 s
0.00…600.0 s
2203 DECELERATION RAMP
TIME
Deceleration ramp time from base frequency (Parameter 9907 MOTOR RATED FREQUENCY)
to standstill in seconds. When set to zero, fastest possible ramp time without trip is
activated.
When set to 0.00, the value of 2206 is used.
0.00…600.0 s
Time
2206 2nd DECELERATION RAMP This parameter allows an alternative deceleration ramp down time to be programmed into
0.00
TIME (FAST STOP)
the ACS255, which can be selected by digital inputs (dependent on the setting of Parameter
9902 DIGITAL INPUTS FUNCTION SELECT or selected automatically in the case of a mains
power loss if parameter 2102 STOP MODE = 2.
0.00…25.0 s
When set to 0.00, the drive will coast to stop.
25 CRITICAL SPEEDS
Speed bands with which the drive is not allowed to operate.
The Skip Frequency function is used to avoid the ACS255 operating at a certain output frequency, for
example at a frequency which causes mechanical resonance in a particular machine.
2500 SKIP FREQUENCY
HYSTERESIS BAND
The drive output frequency will ramp through the defined band at the rates set in parameter 0.0
2202 and 2203 respectively, and will not hold any output frequency within the defined band.
If the frequency reference applied to the drive is within the band, the drive output frequency
will remain at the upper or lower limit of the band.
Hz/Rpm
0.0…2008
2501 SKIP FREQUENCY
Defines the center point of the skip frequency band, and is used conjunction with parameter
2550 SKIP FREQUENCY HYSTERESIS BAND
0.0…2008
26 MOTOR CONTROL
Motor control variables
2601 ENERGY OPTIMIZER
Enables or disables Energy optimizer
0 :
Disabled
0 : DISABLED
1 : ENABLED
The Energy Optimizer attempts to reduce the overall energy consumed by the drive and
motor when operating at constant speeds and light loads. The output voltage applied to the
motor is reduced. The Energy Optimizer is intended for applications where the drive may
operate for some periods of time with constant speed and light motor load, whether
constant or variable torque.
40
Parameters in the Long parameter mode
Index Name/Selection
2603 V/F MODE VOLTAGE
BOOST
Description
Def
3.0 %
Voltage boost is used to increase the applied motor voltage at low output frequencies, in order
to improve low speed and starting torque. Excessive voltage boost levels may result in increased
motor current and temperature, and force ventilation of the motor may be required.
A suitable setting can usually be found by operating the motor under low load or no load
conditions at approximately 5Hz, and adjusting parameter 2603 until the motor current is no
more than 80% of the rated full load current.
0.0…20.0 %
2606 EFFECTIVE SWITCHING
FREQUENCY
Sets maximum effective switching frequency of the drive. If “rEd” is displayed, the
switching frequency has been reduced to the level in Parameter 0417 INTERNAL EFFECTIVE Dependent
SWITCHING FREQUENCY due to excessive drive heat sink temperature.
Drive Rating
Refer to parameter 0417 INTERNAL EFFECTIVE SWITCHING FREQUENCY for further
information regarding operation at higher switching frequency.
4…32 kHz
2610 V/F CHARACTERISTIC
ADJUSTMENT VOLTAGE
0 V…255/500
Used in conjunction with parameter 2611 V/F CHARACTERISTIC ADJUSTMENT FREQUENCY
0 V
2611 V/F CHARACTERISTIC
This parameter in conjunction with parameter 2610 V/F CHARACTERISTIC ADJUSTMENT
0.0 Hz
ADJUSTMENT FREQUENCY VOLTAGE sets a frequency point at which the voltage set in parameter 2611 V/F
CHARACTERISTIC ADJUSTMENT FREQUENCY is applied to the motor. Care must be taken to
further information.
0.0 Hz…Value set in 9907
30 FAULT FUNCTIONS
Programmable protection functions
3005 THERMAL OVERLOAD
VALUE RETENTION
0 : DISABLED
0 :
DISABLED
Alternative means of protecting the motor from thermal overload must be applied (e.g.
PTC thermistor)
1 : ENABLED
32 SUPERVISION
The drive will retain the motor thermal overload value following a mains power cycle.
Signal supervision. The drive monitors whether certain user selectable variables are within
the user-defined limits. The user may set limits for speed, current etc. Supervision status
can be monitored with relay output. See parameter group 14 RELAY OUTPUTS.
Adjustable threshold level used in conjunction with settings 4 to 7 of parameter 1401
OUTPUT RELAY FUNCTION SELECT
3200 RELAY THRESHOLD LEVEL
100.0 %
0.0…200.0 %
34 PANEL DISPLAY
Selection of actual signals to be displayed on the drives front panel e.g. to display conveyer
speed in feet per second based on the output frequency
3400 DISPLAY SPEED SCALING
FACTOR
0.000…6.000
40 PROCESS PI SETUP
4001 PI PROPORTIONAL GAIN
Allow the user to display an alternative output unit scaled from an existing parameter,.
This function is disabled if set to 0.000.
0.000
1.0
Process PI control parameter set
PI Controller Proportional Gain. Higher values provide a greater change in the drive output
frequency in response to small changes in the feedback signal. Too high a value can cause
instability
0.0…30.0
4002 PI INTEGRAL TIME
CONSTANT
0.0…30.0 S
4005 PI OPERATING MODE
0 : DIRECT OPERATION
PI Controller Integral Time. Larger values provide a more damped response for systems
where the overall process responds slowly
1.0 s
0
Use this mode if an increase in the motor speed should result in an increase in the
feedback signal
1 : INVERSE OPERATION
Use this mode if an increase in the motor speed should result in a decrease in the feedback
signal
4010 PI REFERENCE (SETPOINT)
Selects the source for the PID Reference / Setpoint
0
SOURCE SELECT
0
1
Digital Preset Setpoint. Parameter 4011 PI Digital Reference (Setpoint) is used
Analog Input 1 Setpoint
4011 PI DIGITAL REFERENCE
When parameter 4010 PID REFERENCE (SETPOINT) SOURCE SELECT = 0, this parameter
sets the preset digital reference (setpoint) used for the PID Controller
0 %
0
(SETPOINT)
0.0…100.0 %
4016 PI FEEDBACK SIGNAL
SOURCE SELECT
0
1
2
Analog Input 2(Terminal 4)
Analog Input 1(Terminal 6)
Motor Current
41
Parameters in the Long parameter mode
Index Name/Selection
53 COMMUNICATIONS
PARAMETERS
Description
Def
5302 SERIAL
This parameter has three sub settings used to configure the Modbus RTU Serial
Communications. The Sub Parameters are :
Drive Address : Adr 0 to Adr 63
1
COMMUNICATIONS
CONFIGURATION
Baud Rate : 9.6kbps to 115.2kbps
Watchdog Timeout : 0 (Disabled, 300, 3000 milliseconds)
99 START-UP DATA
Application macros. Definition of motor set-up data.
As shown in the table below Parameter 9902 has a number of pre-programmed parameter
sets (and terminal functions) which the user selects to best suit the application.
Defines the function of the digital inputs depending on the control mode setting in
This parameter should be set to the rated (nameplate) voltage of the motor (Volts).
9902
9905
DIGITAL INPUTS
FUNCTION SELECT
MOTOR RATED VOLTAGE
1
Drive Rating
Dependent
110V/230V rated drives
0…255V
400V rated drives
0…500V
Voltage
Note : The stress on the motor insulation is always dependent on the drive supply voltage.
This also applies in the case where the motor voltage rating is lower than the rating of the
drive and the supply of the drive.
9906
MOTOR RATED CURRENT
This parameter should be set to the rated (nameplate) current of the motor.
Drive Rating
Dependent
0.2*drive rated output
current…1.0*drive rated
output current
Current
9907
9908
MOTOR RATED
FREQUENCY
25…500Hz
MOTOR RATED SPEED
This parameter should be set to the rated (nameplate) frequency of the motor
60Hz
Frequency
This parameter can optionally be set to the rated (nameplate) rpm of the motor. When set
to the default value of zero, all speed related parameters are displayed in Hz, and the slip
compensation for the motor is disabled. Entering the value from the motor nameplate
enables the slip compensation function, and the ACS255 display will now show motor speed
in estimated rpm. All speed related parameters, such as Minimum and Maximum Speed,
Preset Speeds etc. will also be displayed in Rpm.
0 Rpm
0…30000 Rpm
10.5. Adjusting the Voltage / Frequency (V/f) characteristics
The V/f characteristic is defined by several parameters as follows :-
Parameter 9905 : Motor Rated Voltage
9905
Parameter 9907 : Motor Rated Frequency
The voltage set in parameter 9905 is applied to the motor at the frequency set Under
normal operating conditions, the voltage is linearly reduced at any point below the
motor rated frequency to maintain a constant motor torque output as shown by the
line ‘A’ on the graph.
By using parameters parameter 2610 and 2611, the voltage to be applied at a particular
frequency can be directly set by the user, thereby altering the V/F characteristic.
Reducing the voltage at a particular frequency reduces the current in the motor and
hence the torque and power, hence this function can be used in fan and pump
applications where a variable torque output is desired by setting the parameters as
follows :-
2610
Parameter 2610 = 9905 / 4
Parameter 2611 = 9907 / 2
2611
9907
This function can also be useful if motor instability is experienced at certain
frequencies, if this is the case increase or decrease the voltage (Parameter 2610) at the
speed of instability (Parameter 2611).
Frequency
For applications requiring energy saving, typically HVAC and pumping, the energy
optimizer (Parameter 2601) parameter can be enabled. This automatically reduces the
applied motor voltage on light load.
10.6. Motor Thermistor Connection
The motor thermistor should be connected between terminals 1 and 4 as shown. A
setting of Parameter 9902 where Digital Input 3 is programmed for ‘External Trip’ must
be used. The current flow through the thermistor is automatically controlled to
prevent a failure.
1 : + 24 Volt
4 : External Trip
42
10.7. Parameters in the Advanced parameter mode
The following table describes the parameters that are visible in the Short parameter mode. See page 25 for how to select the
Parameters in the Advanced parameter mode
Index
2017
Name/Selection
Description
Def
Maximum Current Limit
Defines the max current limit in vector control modes.
150 %
0.0…175.00
2105
DC Injection Speed
Sets the speed at which DC injection current is applied during braking to
Stop, allowing DC to be injected before the drive reaches zero speed if
desired.
0.0 Hz/Rpm
0.0…2008
2106
2301
2605
DC Injection Current
Sets the level of DC injection braking current applied according to the
conditions set in 2104 and 2105.
20 %
50 %
0
0.0…100.0
Vector Mode Gain
Single Parameter for Vector speed loop tuning. Affects P & I terms
simultaneously. Not active when 9903 = 1.
0.0…200.0
Operating Mode Select
Provides a quick set up to configure key parameters according to the intended
application of the drive. Parameters are preset according to the table.
Torque
Current Limit
(2017)
Characteristic
(2610 &
2611)
Setting
Application
Spin Start
(2101)
0
1
2
General
Pump
Fan
150%
110%
110%
Constant
Variable
Variable
0 : Off
0 : Off
2 : On
Intended for general purpose applications.
Intended for centrifugal pump applications.
Intended for Fan applications.
0: Industrial Mode
1: Pump Mode
2: Fan Mode
9903
9910
Motor Control Mode
Selects the motor control method.
1
0: Vector speed control mode
1: V/f mode
2: PM motor vector speed control
3: Reserved
Motor parameter Autotune
Drive measures the motor parameters for optimum control and efficiency.
Following completion of the autotune.
0: Disable
0: Disable
1: Enable
Drive immediately carries out a non-rotating autotune, parameter 9910
MOTOR PARAMETER AUTO-TUNE ENABLE returns to 0 when
completed.
11201
11203
11206
MOTOR STATOR RESISTANCE (Rs)
MOTOR STATOR INDUCTANCE (Lsd)
Motor stator resistance value measured during the autotune.
For induction motors: phase stator inductance value.
measured during the autotune
-
-
-
MOTOR STATOR q-axis INDUCTANCE
(Lsq)
43
10.8. Preventing un-authorized parameter editing.
This function can be used to prevent an un-authorized person from changing the drive parameter values; this function is disabled when
delivered from the factory.
Relevant Parameters
Parameter Access Unlock
0…65535
1602
Parameter Access code
1603
0…65535
Locking Parameter Access
Go to Parameter 1603 (Long Parameter group) and enter in your chosen parameter access code.
Press the
button to exit and parameter 1603 will then be hidden and all parameters will be “Read only” (except for
Parameter 1602 which will remain “Read Write”.
Unlocking Parameter Access
Enter into Parameter 1602 the same value as 1603 (as chosen in “Locking Parameter Access” above).
All parameters will now be “Read Write” and parameter 1603 will become visible and show the value which was originally
programmed as the parameter access code.
To disable this feature set parameter 1603 PARAMETER ACCESS CODE to zero and then 1602 PARAMETER ACCESS UNLOCK to
zero.
44
11. Modbus RTU Communications
11.1. Introduction
The ACS255 can be connected to a Modbus RTU network via the RJ45 connector on the front of the drive.
11.2. Modbus RTU Specification
Protocol
Modbus RTU
Error check
Baud rate
Data format
Physical signal
User interface
CRC
9600bps, 19200bps, 38400bps, 57600bps, 115200bps (default)
1 start bit, 8 data bits, 1 stop bits, no parity.
RS 485 (2-wire)
11.3. RJ45 Connector Configuration
Connection details are shown on page 24.
11.4. Modbus Telegram Structure
The ACS255 supports Master / Slave Modbus RTU communications, using the 03 Read Holding Registers and 06 Write Single Holding
Register commands. Many Master devices treat the first Register address as Register 0; therefore it may be necessary to convert the
Register Numbers detail in section 45 by subtracting 1 to obtain the correct Register address. The telegram structure is as follows:-
Command 03 – Read Holding Registers
Command 06 – Write Single Holding Register
Master Telegram
Slave Address
Length
Slave Response
Slave Address
Starting Address
1st Register Value
2nd Register Value
Etc...
Length
Master Telegram
Slave Address
Function Code (06)
Register Address
Value
Length
Slave Response
Slave Address
Function Code (06)
Register Address
Register Value
CRC Checksum
Length
1
1
2
2
2
Byte
1
1
2
2
Byte
Byte
Bytes
Bytes
1
1
2
2
2
Byte
Byte
Bytes
Bytes
Bytes
1
1
2
2
2
Byte
Byte
Bytes
Bytes
Bytes
Function Code (03)
1st Register Address
No. Of Registers
CRC Checksum
Byte
Bytes
Bytes
Bytes
CRC Checksum
CRC Checksum
2
Bytes
11.5. Modbus Register Map
Par.
Function
Register
Number
1
Supported
Commands
03,06
Type
Range
Explanation
16 Bit Word.
Low Byte
High Byte
-
R/W
Drive Control Command
0..3
Bit 0 : Low = Stop, High = Run Enable
Bit 1 : Low = Decel Ramp 1 (parameter 2203),
High = Decel Ramp 2 (Parameter 2206)
Bit 2 : Low = No Function, High = Fault Reset
Bit 3 : Low – No Function, High = Coast Stop
request
2
4
6
-
-
-
R/W
R/W
R
03,06
03,06
03
Modbus Speed reference setpoint
Acceleration and Deceleration Time 0..60000 Ramp time in seconds x 100, e.g. 255 = 2.5 seconds
0..5000
Setpoint frequency x10, e.g. 100 = 10.0Hz
Error code
Drive status
Low Byte = Drive Error Code, see page 50
High Byte = Drive Status as follows :-
0 : Drive Stopped, 1: Drive Running, 2: Drive Tripped
7
8
11
R
R
R
03
03
03
Output Motor Frequency
Output Motor Current
Digital input status
0..20000 Output frequency in Hz x10, e.g. 100 = 10.0Hz
0..480
0..15
Output Motor Current in Amps x10, e.g. 10 = 1.0 Amps
Indicates the status of the 4 digital inputs
Lowest Bit = 1 Input 1
-
20
21
22
23
24
0120
0121
0111
0107
0110
R
R
R
R
R
03
03
03
03
03
Analog Input 1 value
Analog Input 2 value
Speed Reference Value
DC bus voltage
0..1000
0..1000
0..1000
0..1000
0..100
Analog input % of full scale x10, e.g. 1000 = 100%
Analog input % of full scale x10, e.g. 1000 = 100%
Displays the setpoint frequency x10, e.g. 100 = 10.0Hz
DC Bus Voltage in Volts
Drive temperature
Drive heatsink temperature in ºC
All user configurable parameters are accessible as Holding Registers, and can be Read from or Written to using the appropriate Modbus
Depending on the operating mode of the drive – some parameters cannot be changed whilst the drive is enabled for example.
Modbus RTU supports sixteen bit integer values, hence where a decimal point is used in the drive parameter; the register value will be
multiplied by a factor of ten, E.g. Read Value of parameter 2008 MAXIMUM FREQUENCY / SPEED LIMIT = 500, therefore this is 50.0Hz
45
11.6. Modbus Parameter Register Map
Register No Parameter No
Description
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
0401
1100
1103
1202
1203
1204
1205
1300
1301
1302
1304
1401
1501
1602
1603
2007
2008
2020
2101
2102
2104
2108
2202
2203
2206
2550
TRIP HISTORY LOG
KEYPAD MODE RESTART FUNCTION
PRIMARY COMMAND SOURCE MODE
PRESET / JOG FREQUENCY / SPEED 1
PRESET / JOG FREQUENCY / SPEED 2
PRESET / JOG FREQUENCY / SPEED 3
PRESET / JOG FREQUENCY / SPEED 4
ANALOG INPUT 1 SIGNAL FORMAT
ANALOG INPUT 1 OFFSET
ANALOG INPUT 1 SCALING
ANALOG INPUT 2 SIGNAL FORMAT
OUTPUT RELAY FUNCTION SELECT
ANALOG OUTPUT FUNCTION SELECT
PARAMETER ACCESS UNLOCK
PARAMETER ACCESS CODE DEFINITION
MINIMUM FREQUENCY / SPEED LIMIT
MAXIMUM FREQUENCY / SPEED LIMIT
BRAKE CHOPPER ENABLE
SPIN START (Size E2 & E3 ONLY) / DC INJECTION TIME ON START (Size E1 ONLY)
STOP MODE
DC INJECTION TIME ON STOP
TERMINAL MODE RESTART FUNCTION
ACCELERATION RAMP TIME
DECELERATION RAMP TIME
2nd DECELERATION RAMP TIME (FAST STOP)
SKIP FREQUENCY HYSTERESIS BAND
155
2551
SKIP FREQUENCY
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
2601
2603
2606
2610
2611
3005
3200
3400
4001
4002
4005
4010
4011
4016
5302
9902
9905
9906
ENERGY OPTIMISER
V/F MODE VOLTAGE BOOST
EFFECTIVE SWITCHING FREQUENCY
V/F CHARACTERISTIC ADJUSTMENT VOLTAGE
V/F CHARACTERISTIC ADJUSTMENT FREQUENCY
THERMAL OVERLOAD VALUE RETENTION
RELAY THRESHOLD LEVEL
DISPLAY SPEED SCALING FACTOR
PI PROPORTIONAL GAIN
PI INTEGRAL TIME CONSTANT
PI Operating Mode
PI Reference (Setpoint) Source Select
PI Digital Reference (Setpoint)
PI Feedback Signal Source Select
SERIAL COMMUNICATIONS CONFIGURATION
DIGITAL INPUTS FUNCTION SELECT
Motor Rated Voltage
Motor Rated Current
174
175
9907
9908
Motor Rated Frequency
MOTOR RATED SPEED
46
12.Technical Data
12.1. Environmental
Operational ambient temperature range
(IP20) Open Drives :
(IP66) Enclosed Drives:
-10 … 50°C (frost and condensation free)
-10 ... 40°C (frost and condensation free)
-40 … 60°C
2000m. Derate above 1000m : 1% / 100m
95%, non-condensing
Storage ambient temperature range
Maximum altitude
Maximum humidity
:
:
:
For UL compliance: the average ambient temperature over a 24 hour period for 200-240V, 3HP (IP20) drives is 45°C.
NOTE
12.2. Rating Tables
The following tables provide the output current rating information for the various ACS255 models. ABB Drives always recommend that
selection of the correct ACS255 is based upon the motor full load current at the incoming supply voltage.
Cable sizes shown are the maximum possible that may be connected to the drive. Cables should be selected according to
local wiring codes or regulations at the point of installation
The rated fuse currents given in the table are the maximums for the mentioned fuse types. If smaller fuse ratings are used, check that the fuse
rms current rating is larger than the nominal input current. If 150% output power is needed, multiply nominal input current by 1.5.
Check that the operating time of the fuse is below 0.5 seconds. The operating time depends on the fuse type, the supply network impedance
as well as the cross-sectional area, material and length of the supply cable. In case the 0.5 seconds operating time is exceeded with the gG or T
fuses, ultra rapid (aR) fuses in most cases reduce the operating time to an acceptable level.
Note: Larger fuses must not be used when the input power cable is selected according to this table.
Maximum
Motor Cable
Length
Fuse
(A)
Maximum
Cable Size
Nominal
Output
Current
(A)
Nominal
Input
Current (A)
Nominal Input
Current with 3%
Line Choke (A)
Recommended
Brake Resistance
(Ω)
Power
(HP)
Frame
Size
Model Number
UL
Class
gG
mm2
AWG
Mtrs
CC or J
1-phase 110V…115V AC (+/-10%) - 3 Phase 230V Output
ACS255-01U-02A3-1
ACS255-01U-04A3-1
ACS255-01U-05A8-1
0.5
1
1.5
7.8
15.8
21.9
7.1
15.0
20.1
10
25
32
10
20
30
8
8
8
8
8
8
2.3
4.3
5.8
100
100
100
N/A
N/A
50
E1
E1
E2
1-phase 200…240V AC (+/-10%) - 3 Phase Output
ACS255-01U-02A3-2
ACS255-01U-04A3-2
ACS255-01U-06A1-2
ACS255-01U-07A0-2
ACS255-01U-10A5-2
ACS255-01U-15A3-2
0.5
1.0
1.5
2.0
3.0
5.0
3.7
7.5
11.0
12.9
19.2
29.2
2.9
6.6
9.7
11.4
17.0
25.9
10
10
16
16
25
40
6
10
15
17.5
25
40
8
8
8
8
8
8
8
8
8
8
8
8
2.3
4.3
6.1
7
10.5
15.3
100
100
100
100
100
100
N/A
N/A
N/A
*100
50
E1
E1
E1
E2
E2
E3
50
3-phase 200…240V AC (+/-10%) - 3 Phase Output
ACS255-03U-02A3-2
ACS255-03U-04A3-2
ACS255-03U-06A1-2
ACS255-03U-07A0-2
ACS255-03U-10A5-2
ACS255-03U-18A0-2
0.5
1.0
1.5
2.0
3.0
5.0
3.4
5.6
8.1
8.9
12.1
20.9
2.8
4.4
6.3
7.0
9.9
6
6
10
15
15
17.5
30
8
8
8
8
8
8
8
8
8
8
8
8
2.3
4.3
6.1
7
10.5
18
100
100
100
100
100
100
N/A
N/A
N/A
100
50
E1
E1
E1
E2
E2
E3
10
10
16
16
32
17.4
50
3-phase 380…480V AC (+/-10%) - 3 Phase Output
ACS255-03U-01A2-4
ACS255-03U-02A2-4
ACS255-03U-03A3-4
ACS255-03U-04A1-4
ACS255-03U-05A8-4
ACS255-03U-09A5-4
ACS255-03U-14A0-4
ACS255-03U-18A0-4
0.5
1
1.5
2
3
5
1.9
3.5
4.6
5.6
7.5
11.5
17.2
21.2
1.5
2.7
3.3
4.5
5.5
9.2
14.5
17.2
6
6
6
6
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
1.2
2.2
3.3
4.1
5.8
9.5
14
100
100
100
100
100
100
100
100
N/A
N/A
N/A
*200
200
100
100
50
E1
E1
E1
E2
E2
E2
E3
E3
10
10
16
16
25
32
10
10
10
15
25
30
7.5
10
18
*Internal Braking transistor only available on drives with “+D150” in the model type designation (see section 3.3).
Note
Note
For UL compliance, Motor Cable to be 75°C Copper.
Other fuse types can be used if they meet the ratings and the melting curve of the fuse does not exceed the melting
curve of the fuse mentioned in this table.
47
12.3. Overload
The ACS255 can deliver 150% of the drive nominal output current for 60 seconds and 175% for 2 seconds.
12.4. Additional Information for UL Compliance
ACS255 is designed to meet the UL requirements. In order to ensure full compliance, the following must be fully observed.
For an up to date list of UL compliant products, please refer to UL listing NMMS.E211945
The drive can be operated within an ambient temperature range as stated in section 12.1
For IP20 units, the drive must be installed in a cabinet to fulfil the requirements for shielding from contact and environment
contamination.
For IP66 units, indoor installation in an environment free from icing and condensation.
UL Listed ring terminals / lugs must be used for all bus bar and grounding connections.
Input Power Supply Requirements
Supply Voltage
110-115 Volts RMS for 110 Volt rated drives, + /- 10% variation allowed.
200 – 240 Volts RMS for 230 Volt rated drives, + /- 10% variation allowed.
380 – 480 Volts RMS for 400 Volt rated drives, + / - 10% variation allowed.
Imbalance
Maximum 3% voltage variation between phase – phase voltages allowed
All ACS255 units have phase imbalance monitoring. A phase imbalance of > 3% will result in the drive tripping. For
input supplies which have supply imbalance greater than 3% (typically the Indian sub- continent & parts of Asia Pacific
including China) ABB recommends the installation of input line reactors.
50 – 60Hz + / - 5% Variation
Frequency
Short Circuit Capacity Voltage Rating
Min HP
0.5
0.5
Max HP
1.5
5
Maximum supply short-circuit current
100kA rms (AC)
100kA rms (AC)
115V
230V
400 / 460V
0.5
10
100kA rms (AC)
All the drives in the above table are suitable for use on a circuit capable of delivering not more than the above
specified maximum short-circuit Amperes symmetrical with the specified maximum supply voltage.
Incoming power supply connection must be according to section 5.3
All ACS255 units are intended for indoor installation only and within controlled environments which meet the condition limits shown in section
Branch circuit protection must be installed according to the relevant national codes. Fuse ratings and types are shown in section 12.2
Suitable Power and motor cables should be selected according to the data shown in section 12.2
Power cable connections and tightening torques are shown in section 4.
ACS255 provides motor overload protection in accordance with the National Electrical Code (US).
Where a motor thermistor is not fitted, or not utilized, It is recommended that the Thermal Overload Memory Retention is enabled
by setting 3005 THERMAL OVERLOAD VALUE RETENTION = 1
Where a motor thermistor is fitted and connected to the drive, connection must be carried out according to the information shown
in section 10.6.
12.5. Derating Information
Derating of the drive maximum continuous output current capacity is required when
Operating at ambient temperature in excess of 40°C / 104°F.
Operating at Altitude in excess of 1000m/ 3281 ft.
Operation with Effective Switching Frequency higher than the minimum setting.
The following derating factors should be applied when operating drives outside of these conditions.
12.5.1. Derating for Ambient Temperature
Maximum Temperature
Maximum Permissible Operating
Ambient Temperature with
Derating (Non UL Approved)
50°C
Enclosure Type
Without Derating.
(UL Approved)
50°C / 122°F
Derate by
IP20
IP66
N/A
40°C / 104°F
2.5% per °C (1.8°F)
50°C
12.5.2. Derating for Altitude
Enclosure Type
Maximum Altitude
Derate by
Maximum Permissible
Maximum Permissible
(Non-UL Approved)
4000m / 13123 ft
Without Derating
1000m / 3281ft
1000m / 3281ft
(UL Approved)
2000m / 6562 ft
2000m / 6562 ft
IP20
IP66
1% per 100m / 328 ft
1% per 100m / 328 ft
4000m / 13123 ft
12.5.3. Derating for Switching Frequency
Switching Frequency (Where available)
Enclosure Type
IP20
4kHz
N/A
N/A
8kHz
N/A
10%
12kHz
20%
25%
16kHz
30%
35%
24kHz
40%
50%
32kHz
50%
50%
IP66
48
12.5.4. Example of applying Derating Factors
A 5Hp, 400V/460V IP66 drive is to be used at an altitude of 2000 meters above sea level, with 12kHz switching frequency and 45°C ambient
temperature.
From the table above, we can see that the rated current of the drive is 9.5 Amps at 40°C,
Firstly, apply the switching frequency derating, 12kHz, 25% derating
9.5 Amps x 75% = 7.1 Amps
Now, apply the derating for higher ambient temperature, 2.5% per °C above 40°C = 5 x 2.5% = 12.5%
7.1 Amps x 87.5% = 6.2 Amps
Now apply the derating for altitude above 1000 meters, 1% per 100m above 1000m = 10 x 1% = 10%
7.9 Amps x 90% = 5.5 Amps continuous current available.
If the required motor current exceeds this level, it will be necessary to either
-
-
Reduce the switching frequency selected
Use a higher power rated drive and repeat the calculation to ensure sufficient output current is available.
12.6. Mains Line input Reactors
An optional Line reactor is recommended to be installed on drives where any of the following site conditions occur:-
o The incoming supply impedance is low or the fault level / short circuit current is high.
o If the transformer kVA rating is more than 10x the kVA rating of the drive or ensure that the per drive source
Impedance is less than 0.5%.
o The supply is prone to dips or brown outs.
o An imbalance exists on the supply (3 phase drives).
o The power supply to the drive is via a busbar and brush gear system (typically overhead Cranes).
o Reduction in Harmonics generated by the drive.
In all other installations, it is good practice to install a line reactor as added protection of the drive against power supply faults.
12.6.1. Selecting a Line Reactor
The chosen Line reactor should be in the region of 3% impedance; higher values can be used but will result in less voltage (and less torque) to
the motor as full load is reached.
The continuous current rating should be at least the value of the drives input current rating, with a peak current rating of at least 2 times the
continuous current rating.
49
13.Appendix: Permanent magnet synchronous motors (PMSMs)
With PMSMs special attention must be paid on setting the motor nominal values correctly in parameter group 99 START-UP DATA. It is
important that the nominal back-emf of the motor is available, further to ensure good performance a MOTOR PARAMETER AUTO-TUNE
(9910=1) must be performed.
The following table lists the basic parameter settings needed for permanent magnet synchronous motors.
13.1. PMSM Motor nameplate data entry.
Action
Additional Information
Enable PMSM
motor control
Set 9903 to 2
The phase to phase value (at motor rated Speed) should be obtained from the
motor nameplate or datasheet. If the voltage is given as a proportional value,
such as 103V/1000 rpm in a 3000rpm motor, set 309V here. Sometimes the
value is given as the peak value. In this case divide the value by the square
root of 2 (1.41).
Enter motor back- Enter Back EMF value into 9905
EMF voltage value
Note: Incorrect value can result in abnormal motor operation (motor vibration)
Obtained from Motor nameplate (Amps).
Enter Motor
Rated Current
Enter value into 9906
Note : The drive uses 9907 to calculate the number of motor pole pairs.
Enter Motor
Rated Frequency
Enter value into 9907
Frequency (Hz) = speed (rpm) x (number of pole pairs) / 60
Obtained from Motor nameplate (rpm)
Enter Motor
Enter value into 9908
Rated Speed
Speed (rpm) = frequency (Hz) x 60 / (number of pole pairs)
16kHz provides optimum motor control.
Set Motor
Switching Frequency
Set 2606 to 16kHz
13.2. PMSM Motor Auto-tune.
A Motor Auto-tune must be carried out in order to measure the motor electrical characteristics.
Action
Additional Information
The display will show .
Once the Auto-tune is completed 9910 will return to 0 and the display will
Enable Motor
Auto-tune
Set 9910 to a 1 and press the
button.
show .
Note: Motor Auto-tune will need to be repeated if the motor, motor cables,
motor parameters or drive control mode is changed in 9903.
13.3. Troubleshooting
Observation
Action
Poor torque performance at low speed/poor motor start- Increase value in 2603 (Boost current level)
up
Check correct settings of motor nameplate data.
Check correct value of 9905 (Motor Back EMF voltage).
Reduce value of 2301 (Vector Speed Gain)(As much as 50% reduction in some
instances)
Motor Vibration/trips/Cogging at low speed
Check correct settings of motor nameplate data.
Check correct value of 9905 (Motor Back EMF voltage).
Check Correct setting of 2603 (Boost current level)
Care should be taken not to apply to high of a value in 2603 (Boost current level) as excess motor heating may result.
50
14.Trouble Shooting
14.1. Fault Code Messages
Fault
Code
No.
Description
Corrective Action
Drive is READY and in a stopped condition. The motor is not energized. No enable signal is present to start the drive
0x00
Press the STOP key, drive is ready to configure for particular application
Fault occurs immediately on drive enable or run command
Check the output wiring connections to the motor and the motor for short circuits phase to
phase and phase to earth.
Fault occurs during motor starting
Check the motor is free to rotate and there are no mechanical blockages. If the motor has a
brake fitted, check the brake is releasing correctly. Check for correct star-delta motor wiring.
Ensure the motor nameplate current is correctly entered in parameter 9906. Increase
acceleration time in parameter 2202. Reduce motor boost voltage setting in parameter 2603
Fault occurs when motor operating at constant speed Investigate overload.
Fault occurs during motor acceleration or deceleration
0X0A Factory Default parameters have been loaded
Instantaneous Over current on the drive
output.
Excess load or shock load on the motor.
0x03
The accel/decel times are too short requiring too much power. If parameter 2202 or 2203
cannot be increased, a bigger drive may be required
Ensure the correct motor nameplate current value is entered in parameter 9906. Check for
correct Star or Delta wiring configuration. Check to see when the decimal points are flashing
(which indicates the output current > parameter 9906 value) and either increase acceleration
ramp (parameter 2202) or decrease motor load. Check the total motor cable length is within
the drive specification. Check the load mechanically to ensure it is free, and that no jams,
blockages or other mechanical faults exist
Motor thermal overload protection trip. The
drive has tripped after delivering >100% of
value in 9906 for a period of time to prevent
damage to the motor.
0x04
Check the cabling to the brake resistor and the brake resistor for short circuits or damage.
Ensure the resistance of the brake resistor is equal to or greater than the minimum value for the
relevant drive shown in the table in section 12.2
Brake channel over current (excessive current
in the brake resistor)
0x01
0x02
Only occurs if parameter 2020 = 1. The internal software protection for the brake resistor has
activated to prevent damage to the brake resistor.
Brake resistor thermal overload. The drive has
tripped to prevent damage to the brake
resistor
Increase the deceleration time (parameter 2203) or 2nd deceleration time (parameter 2206).
Reduce the load inertia
For Other Brake Resistors
Ensure the resistance of the brake resistor is equal to or greater than the minimum value for the
the brake resistor. In this case, parameter 2020 may be set to 2
Check the wiring to motor and the motor for phase to phase and phase to earth short circuits.
Disconnect the motor and motor cable and retest. If the drive trips with no motor connected, it
must be replaced and the system fully checked and retested before a replacement unit is
installed.
Hardware Over Current
0x05
Check the supply voltage is within the allowed tolerance for the drive. If the fault occurs on
deceleration or stopping, increase the deceleration time in parameter 2203 or install a suitable
brake resistor and activate the dynamic braking function with parameter 2020
The incoming supply voltage is too low. This trip occurs routinely when power is removed from
the drive. If it occurs during running, check the incoming power supply voltage and all
components in the power feed line to the drive.
The drive is too hot. Check the ambient temperature around the drive is within the drive
specification. Ensure sufficient cooling air is free to circulate around the drive.
Increase the panel ventilation if required. Ensure sufficient cooling air can enter the drive, and
that the bottom entry and top exit vents are not blocked or obstructed.
Trip occurs when ambient temperature is less than -10°C. The temperature must be raised over
-10°C in order to start the drive.
Over voltage on DC bus
Under voltage on DC bus
Heatsink over temperature
0x06
0x07
0x08
0x09
Under temperature
Refer to your local ABB representative
Drive ambient temperature too high, check adequate cooling air is provided
E-trip requested on control input terminals. Some settings of parameter 9902 DIGITAL INPUTS
FUNCTION SELECT require a normally closed contactor to provide an external means of tripping
the drive in the event that an external device develops a fault. If a motor thermistor is
connected check if the motor is too hot.
0x10
0x17
0x0B
Faulty thermistor on heatsink.
Drive internal temperature too high
External trip
(on digital input 3)
Check communication link between drive and external devices. Make sure each drive in the
network has its unique address.
Comms loss trip
0x0C
Drive intended for use with a 3 phase supply has lost one input phase.
Spin start function failed to detect the motor speed.
Parameters not saved, defaults reloaded.
Try again. If problem recurs, refer to your local ABB representative
0x0E
0x0F
Input phase loss trip
Spin start failed
Internal memory fault.
0x11
Check input current in range defined by parameter 1300.
Refer to your local ABB representative
Refer to your local ABB representative
Measured motor stator resistance varies between phases. Ensure the motor is correctly
connected and free from faults. Check the windings for correct resistance and balance.
Measured motor stator resistance is too large. Ensure the motor is correctly connected and free
from faults. Check that the power rating corresponds to the power rating of the connected
drive.
0x12 Analog input current out of range
-
-
Internal drive Fault
Internal drive Fault
40
41
Measured motor inductance is too low. Ensure the motor is correctly connected and free from
faults.
Measured motor inductance is too large. Ensure the motor is correctly connected and free from
faults. Check that the power rating corresponds to the power rating of the connected drive.
Measured motor parameters are not convergent. Ensure the motor is correctly connected and
free from faults. Check that the power rating corresponds to the power rating of the drive.
Autotune Fault
42
43
44
51
52
Contact us
ABB Oy
ABB Inc.
Canada Headquarters, Low
Voltage Drives
AC Drives
Automation Technologies
Drives & Motors
16255 West Glendale Drive
New Berlin, WI 53151
USA
ABB Inc.
P.O. Box 184
FI-00381 HELSINKI
FINLAND
800 Boulevard Hymus,
Saint-Laurent, Québec, H4S 0B5
Canada
Telephone
Fax:
+358 10 22 11
+358 10 22 22681
Telephone : 1-888-856-6266
1-800-HELP-365
Telephone
262 785-3200
1-800-HELP-365
262 780-5135
Fax:
(514) 856-6297
Fax:
3AXD10000528266
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