3Com Network Router 59039 2 User Manual

¹₈-DIN DIGITAL INDICATOR

PRODUCT MANUAL

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59039

₈¹-DIN Digital Indicator

Product Manual - Volume I

¹₈-DIN DIGITAL INDICATOR

PRODUCT MANUAL

VOLUME I

OPERATING INSTRUCTIONS

In normal operation, the operator must not remove the

Indicator from its housing or have unrestricted access to the

rear terminals, as this would provide potential contact with

hazardous live parts.

Installation and configuration must be undertaken by

technically competent servicing personnel. This is covered in

Volume II of this manual.

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₈¹-DIN Digital Indicator

59039

Product Manual - Volume I

Contents

INTRODUCTION

OPERATOR MODE

SET UP MODE

1-1

2-1

3-1

4-1

RS485 SERIAL COMMUNICATIONS

Appendices

Alphabetical Index

A-1

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Section 1

Product Manual - Volume I

Introduction

SECTION 1

INTRODUCTION

The -DIN Digital Indicator is an easy-to-operate microprocessor-based instrument,

incorporating the latest in surface-mount and CMOS technology. The standard features

include:

Large four-digit LED display (orderable as red or green).

Display for units indication

Universal sensor input - thermocouple, three-wire RTD or DC linear

(mA, mV or V)

Input range selected from the front panel.

Alarm 1 latching or non-latching (user-selectable) relay output

Alarm hysteresis

Maximum Hold, Minimum Hold and Time Elapsed features.

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59039

Introduction

Product Manual - Volume I

90 - 264V AC power supply.

Designed to comply with EN50081 Part 2 (Emission) and EN50082

(Immunity) EMC specifications.

Front panel sealing to IP65 (NEMA 4) standard.

Programmable digital filter.

Process Variable offset facility

Alarm type selected from front panel.

Sensor Break indication.

and the many optional features include:

Alarm 2 and Alarm 3 relay outputs

Remote reset of latched alarm

Re-transmitted Process Variable output

Transmitter power supply

ASCII and MODBUS communications protocols

RS485 serial communications.

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Section 2

Product Manual - Volume I

Operator Mode

SECTION 2

OPERATOR MODE

2.1

INTRODUCTION

The Operator Mode is the normal mode of the Indicator, once it has been set up and

configured as required. The front panel displays, indicators and keys are shown in

Figure 2-1.

Figure 2-1 Front Panel Controls, Displays and Indicators

2.2

FOUR-DIGIT DISPLAY

In Operator Mode, this normally displays the process variable value. Using the Scroll

key, the operator may view, in a sequence according to the Operator Mode Display

Strategy parameter in Set Up Mode (see NOTES ON TABLE 3-1):

(i) Current maximum value attained by process variable (since the maximum

value was last reset) - MAX indicator ON when this is displayed. Also saves

the Sensor Break (see Subsection 2.6) and Over-Range (see Subsection

2.5) conditions.

(ii) Current minimum value attained by process variable (since the minimum

value was last reset) - MIN indicator ON when this is displayed. Also saves

the Sensor Break (see Subsection 2.6) and Under-Range (see Subsection

2.5) conditions.

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Operator Mode

Product Manual - Volume I

(iii) Time elapsed in the Alarm 1 active condition (units display shows

The display is in the format mm.ss [mm = minutes, ss = seconds] or mmm.s

[mmm = minutes, s = seconds (tens)]. If elapsed time is greater than 999 min-

utes 59 seconds, display will show:

NOTE: This does not include time when Alarm 1 is latched but alarm condi-

tion is cleared

(iv)Alarm1value (unitsdisplay shows or, if only Alarm 1 present, ).

(v) Alarm 2 value, if fitted and configured (units display shows

(vi) Alarm 3 value, if fitted and configured (units display shows

(iv) Process variable value.

Further depressions of the Scroll key will repeat this display sequence.

2.3

ALARM STATUS INDICATORS

The Alarm Status indicators show the current state of the alarm(s):

AL1 -

Flashes when Alarm 1 is active (with latching alarm, ON when

Alarm 1 is latched but alarm condition has cleared)

Flashes when Alarm 2 is active

AL2 -

AL3 -

Flashes when Alarm 3 is active

For descriptions of the operation of the various types of alarm available, see Section 3.

2.4

RESETTING THE MAXIMUM VALUE/MINIMUM VALUE OR TIME ELAPSED

VALUE

To reset the maximum value, minimum value (to the process variable value at the

instant of resetting) or time elapsed value (to zero):

1. Select the display of the maximum value, minimum value or time

elapsed value (as appropriate - see above).

2. Depress the Raise key or Lower key for three seconds.

The resetting of the value is indicated by the four-digit display showing:

for two seconds before reverting to the maximum value or minimum value display.

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Section 2

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Operator Mode

2.5

OVER-RANGE/UNDER-RANGE DISPLAYS

If the process variable attains a value higher than the input scale maximum limit

(over-range) or lower than the input scale minimum limit (under-range), the upper

display will show:

for the over-range condition and:

for the under-range condition.

2.6

SENSOR BREAK INDICATION

If a break is detected in the sensor circuit, the four-digit display will show:

The reaction of the alarms to a detected sensor break is dependent upon the input type.

2.7

COLD JUNCTION COMPENSATION DISABLED

If a thermocouple input is fitted, the Cold Junction Compensation should

be enabled. If it is disabled, whenever the process variable is displayed,

the unit display will be as shown on the right.

2.8

RESETTING THE LATCHED ALARM

If Output 1 is configured to be a latched alarm output, once it becomes active it will

remain active (even if the alarm condition itself is cleared) until reset either from the

front panel or via the Remote Reset hardware option. To reset the latched alarm from

the front panel:

1. Ensure that the normal Operating Mode display (i.e. process variable)

is shown.

2. Press either the Raise key or the Lower key for at least three seconds.

The four-digit display will then show:

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Operator Mode

Product Manual - Volume I

for two seconds, indicating that the latched alarm has been reset. The latched Alarm 1

can be reset only if the original alarm condition has been cleared; this reset has no

effect whilst the alarm condition prevails.

2.9

VIEWING THE HARDWARE DEFINITION CODE

The operator may view the current Hardware Definition Code setting in the four-digit

display by simultaneously depressing the Lower and Scroll keys. A return may be made

to the normal Operator Mode display by simultaneously depressing the Lower and

Scroll keys.

NOTE: An automatic return is made to the normal Operator Mode

display after 30 seconds.

To view the Hardware Option setting, press the Scroll key whilst the Hardware

Definition Code is displayed. To return to the Hardware Definition Code display,

depress the Lower and Scroll keys simultaneously.

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Section 3

Product Manual - Volume I

Set Up Mode

SECTION 3

SET UP MODE

3.1

ENTRY INTO SET UP MODE

To enter Set Up Mode, with the instrument initially in Operator Mode displaying the

process variable value, depress the Raise and Scroll keys simultaneously for three

seconds. The instrument will then enter Set Up Mode and the SET indicator will come

ON, the instrument still displaying the process variable value.

NOTE: If the four-digit display shows:

(i.e. all decimal point positions illuminated), this indicates that one or

more of the critical Configuration Mode parameters - typically input

range - have been altered in value/setting and, as a consequence, all

Set Up Mode parameters have been automatically set to their default

values/settings. To clear this display, simply alter the value/setting of

any Set Up Mode parameter (see below).

The parameters available for view/adjustment in Set Up Mode are summarised in Table

3-1. When Set Up Mode is active, the units display (normally ^oF, ^oC or blank) will show

the single-character legend for the selected parameter and the value for that parameter

will be shown in the four-digit display. The user may step through the Set Up Mode

parameters by depressing the Scroll key. The value/setting may be altered using the

Raise/Lower keys.

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Set Up Mode

Product Manual - Volume I

Table 3-1 Set Up Parameters

Parameter

Legend

Adjustment Range

Range Min. to Range Max.

Default

Range Max. (Proc. High)

Range Min. (Proc. Low)

Alarm 1 Value

Alarm 1 Hysteresis

1 LSD to 10% of span expressed

as display units

1 LSD

Alarm 2 Value

Range Min. to Range Max.

Range Max. (Proc. High)

Range Min. (Proc. Low)

Alarm 2 Hysteresis

1 LSD to 10% of span expressed

as display units

1 LSD

Alarm 3 Value

Range Min. to Range Max.

Range Max. (Proc. High)

Range Min. (Proc. Low)

Alarm 3 Hysteresis

1 LSD to 10% of span expressed

as display units

1 LSD

Process Variable Offset

Digital Filter Time Const.

æinput span of instrument

0.0 secs. (OFF) to 100.0 secs. in

0.5 sec. increments.

2.0 secs.

Linear Input Decimal

Point Position

0 (XXXX), 1 (XXX.X), 2 (XX.XX)

or 3 (X.XXX)

Linear Input Scale

Range Minimum

–1999 to 9999

0, 1, 2, 3 or 4

0000

Linear Input Scale

1000

Range Maximum

Recorder Output Scale

Minimum

Range Min.

Range Max.

Recorder Output Scale

Maximum

Operator Mode Display

Strategy

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Set Up Mode

NOTES ON TABLE 3-1

1. The legend for this parameter will be

alarms are fitted/configured.

if only Alarm 1 is fitted/configured or

if o ther

2. These parameters appear in the display sequence only if Alarm 2 is fitted/configured.

3. These parameters appear in the display sequence only if Alarm 3 is fitted/configured.

4. Only applicable if a DC Linear input is fitted.

5. Defines the parameters displayed in sequence in Operator Mode:

Parameter Setting

PV value

Max. PV value

Min. PV value

Elapsed Time

Max. PV value

Min. PV value

Alarm 1 value

Alarm 2 value *

Alarm 3 value *

Max. PV value

Min. PV value

Alarm 1 value

Alarm 2 value *

Max. PV value

Min. PV value

Elapsed Time

Alarm 1 value

Alarm 3 value * Alarm 2 value *

Alarm 3 value

* If configured/fitted

3.2

ALAR M 1 VALUE

If Alarm 1 is selected to be a Process High alarm, this defines the process variable

value at or above which Alarm 1 will be active; the default value will be Input Range

Maximum. If Alarm 1 is selected to be a Process Low alarm, this defines the process

variable value at or below which Alarm 1 will be active; the default value will be Input

Range Minimum. Its value may be adjusted between Input Range Maximum and Input

Range Minimum. Alarm operation is illustrated in Figure 3-1.

3.3

ALARM 1 HYSTERESIS

This parameter applies a hysteresis band on the “safe” side of the Alarm 1 value. The

effect of the hysteresis value on alarm operation is shown in Figure 3-2.

3.4

ALARM 2 VALUE

If Alarm 2 is selected to be a Process High alarm, this defines the process variable

value at or above which Alarm 2 will be active; the default value will be Input Range

Maximum. If Alarm 2 is selected to be a Process Low alarm, this defines the process

variable value at or below which Alarm 2 will be active; the default value will be Input

Range Minimum. Its value may be adjusted between Input Range Maximum and Input

Range Minimum. Alarm operation is illustrated in Figure 3-1.

3.5

ALARM 2 HYSTERESIS

This parameter applies a hysteresis band on the “safe” side of the Alarm 2 value. The

effect of the hysteresis value on alarm operation is shown in Figure 3-2.

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Product Manual - Volume I

3.6

ALARM 3 VALUE

If Alarm 3 is selected to be a Process High alarm, this defines the process variable

value at or above which Alarm 3 will be active; the default value will be Input Range

Maximum. If Alarm 3 is selected to be a Process Low alarm, this defines the process

variable value at or below which Alarm 3 will be active; the default value will be Input

Range Minimum. Its value may be adjusted between Input Range Maximum and Input

Range Minimum. Alarm operation is illustrated in Figure 3-1.

3.7

ALARM 3 HYSTERESIS

This parameter applies a hysteresis band on the “safe” side of the Alarm 3 value. The

effect of the hysteresis value on alarm operation is shown in Figure 3-2.

3.8

PROCESS VARIABLE OFFSET

This parameter is used to modify the actual process variable value (measured at the

input terminals) in the following manner:

Offset PV value = Actual PV value + Process Variable Offset value.

The offset process variable value is used for all PV-dependent functions (display,

alarm, recorder output).

CAUTION: This is, in effect, a calibration adjustment. Injudicious application

of valuesto this parametercouldleadtothedisplayed process variable value

bearing no meaningful relationship to the actual process variable value.

There is no front panel indication when this parameter is in effect (i.e.

has been set to a non-zero value).

The default value is 0.

3.9

INPUT FILTER TIME CONSTANT

The input is equipped with a digital filter which is used to filter out any extraneous

impulses on the process variable. This filtered PV is used for all PV-dependent

functions (alarms etc.). The time constant for this filter may be adjusted in the range 0.0

seconds (filter OFF) to 100.0 seconds in 0.5 second increments. The default setting is

2.0 seconds.

CAUTION: If this parameter is set excessively high, the indication

quality may be significantly impaired. The value chosen should be

sufficiently large to attenuate stray noise but no larger.

3.10 LINEAR INPUT SCALE RANGE MINIMUM

This parameter, applicable only if a linear input is fitted, defines the scaled input value

when the process variable input is at its minimum value. It is adjustable between –1999

and 9999 (with decimal point as defined by Linear Input Decimal Point Position). The

default value is 0. This parameter can be set to a value greater than (but not equal to)

Linear Input Scale Range Maximum, in which case the sense of the input is reversed.

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Section 3

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Set Up Mode

3.11 LINEAR INPUT SCALE RANGE MAXIMUM

This parameter, applicable only if a linear input is fitted, defines the scaled input value

when the process variable input is at its maximum value. It is adjustable between –1999

and 9999 (with decimal point as defined by Linear Input Decimal Point Position). The

default value is 1000. This parameter can be set to a value less than (but not equal to)

Linear Input Scale Range Minimum, in which case the sense of the input is reversed.

3.12 RECORDER OUTPUT SCALE MINIMUM

This parameter defines the value of the process variable at which the Recorder Output

reaches its minimum value; for example, for a 0 - 5V Recorder Output, this value

corresponds to 0V. It may be adjusted within the range –1999 to 9999. The decimal

point position for the Recorder Output is always the same as that for the process

variable input range. The default value is Input Range Minimum. This parameter is not

applicable if the Recorder Output option is not fitted.

NOTE: If this parameter is set to a value greater than that for the

Recorder Output Scale Maximum (see Subsection 3.13), the

relationship between the process variable value and the Recorder

Output is reversed.

3.13 RECORDER OUTPUT SCALE MAXIMUM

This parameter defines the value of process variable at which the Recorder Output

reaches its maximum value; for example, for a 0 - 5V Recorder Output, this value

corresponds to 5V. It may be adjusted within the range –1999 to 9999. The decimal

point position for the Recorder Output is always the same as that for the process

variable input range. The default value is Input Range Maximum. This parameter is not

applicable if the Recorder Output option is not fitted.

NOTE: If this parameter is set to a value less than that for the Recorder

Output Scale Minimum (see Subsection 3.12), the relationship

between the process variable/setpoint value and the Recorder Output

is reversed.

3.14 OPERATOR MODE DISPLAY STRATEGY

This defines the sequence of parameter displays available in Operator Mode (see

NOTES ON TABLE 3-1).

3.15 EXIT FROM SET UP MODE

To leave Set Up Mode, select the initial Operator Mode display (process variable value)

then depress the Raise and Scroll keys simultaneously, whereupon the SET indicator

will go OFF and the instrument will return to Operator Mode.

NOTE: An automatic return to Operator mode will be executed if there

is no key activity in Set Up Mode for one minute.

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Product Manual - Volume I

Process High Alarm

direct-acting

Process High Alarm

reverse-acting

Process Low Alarm

direct-acting

Process Low Alarm

reverse-acting

Figure 3-1

Alarm Operation

Alarm Value

Alarm Hysteresis

PROCESS

HIGH

ALARM

Process Variable

Alarm Inactive

Alarm Active

Process Variable

PROCESS

LOW

ALARM

Alarm Hysteresis

Alarm Value

Alarm Inactive

Alarm Active

Alarm Inactive

Figure 3-2

Alarm Hysteresis Operation

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Section 4

Product Manual - Volume I

RS485 Serial Communications

SECTION 4

RS485 SERIAL COMMUNICATIONS

This three-wire RS485-compatible serial communications option is the means by which

communication may occur between the instrument and a master device (e.g. a

computer or terminal).

4.1

PHYSICAL REQUIREMENTS

There are two communications protocols available with this option:

(a) ASCII

(b) MODBUS

4.1.1

Character Transmission

Data format is fixed to be seven data bits and one stop bit. The Baud rate may be

selected to be 1200, 2400, 4800 (default) or 9600 Baud. For ASCII protocol, the parity

is even. For MODBUS protocol, the parity is selectable to be even, odd or none.

4.1.2

Line Turn-Round

ASCII Protocol: The communications link is operated as a multi-drop half

duplex system. When a device is transmitting, it drives the transmission lines

to the appropriate levels; when it is not transmitting, its outputs are set to a

high impedance in order that another device can transmit. It is important that

a transmitter releases the transmission lines before another device starts

transmission. This imposes the following restraints on the master device:

(a) The transmitter must release the transmission lines within 6ms of

the end of the last character of a message being transmitted. Note that

delays due to buffers such as those used in universal asynchronous

receivers/transmitters (UARTs) within the master device must be taken

into account.

(b) The transmitter must not start transmission until 6ms has elapsed

since the reception of the last character of a message.

All instruments in this range having an RS485 communications facility ad-

here to this standard; thus, provided that the master device conforms simi-

larly to the standard, there should be no line contention problems.

MODBUS Protocol: The line turn-round timings adhere to the industry stan-

dard.

4.2

ASCII PROTOCOL

This protocol assumes half duplex communications. All communication is initiated by

the master device. The master sends a command or query to the addressed slave and

the slave replies with an acknowledgement of the command or the reply to the query.

All messages, in either direction, comprise:

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Product Manual - Volume I

(a) A Start of Message character

(b) One or two address characters (uniquely defining the slave)

(d) An End of Message character

Messages from the master device may be one of four types:

Type 1:

Type 2:

Type 3:

Type 4:

L {N} ? ? *

L {N} {P} {C} *

L {N} {P} # {DATA} *

L {N} {P} I *

where all characters are in ASCII code and:

is the Start of Message character (Hex 4C)

{N}

is the slave address (in the range 1 - 32); addresses 1 - 9

may be represented by a single digit (e.g. 7) or in two-digit

form, the first digit being zero (e.g. 07).

{P}

is a character which identifies the parameter to be interro-

gated/modified - see Table 4-2.

{C}

is the command (see below)

indicates that {DATA} is to follow (Hex 23)

isastringofnumericaldatainASCII code (see Table 4-1)

is the End of Message character (Hex 2A)

{DATA}

No space characters are permitted in messages. Any syntax errors in a received

message will cause the slave to issue no reply and await the Start of Message

character.

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RS485 Serial Communications

Table 4-1 {DATA} Element - Sign and Decimal Point Position

{DATA} Content

abcd0

Sign/Decimal Point Position

+abcd

abcd1

abcd2

abcd3

abcd5

abcd6

abcd7

abcd8

+abc. d

+ab. cd

+a. bcd

–abcd

–abc. d

–ab. cd

–a. bcd

Table 4-2 Commands/Parameters and Identifiers

Identifier

Character

Parameter/Command

Operation

Maximum Process Variable value

Minimum Process Variable value

Alarm 1 value

Read Only

Read/Write

Alarm 1 Hysteresis value

Alarm 2 value

Alarm 2 Hysteresis value

Scale Range Maximum

Read/Write (linear inputs

only) - otherwise Read Only

Scale Range Minimum

Read/Write (linear inputs

only) - otherwise Read Only

Process Variable Offset value

Instrument Status

Read/Write

Read Only

Read/Write

Process Variable value

Alarm 3 value

Alarm 3 Hysteresis

Scale Range Decimal Point Position

Read/Write (linear inputs

only) - otherwise Read Only

[

]

Time Elapsed

Instrument Commands

Recorder Output Scale Maximum

Read Only

Write Only

Read/Write

Read Only

Read/Write

Recorder Output Scale Minimum

Scan Table

Input Filter Time Constant value

NOTES

1. Applicable only if Alarm 2 is configured.

2. See Subsection 4.3.15.

3. Applicable only if Alarm 3 is configured.

4. See Subsection 4.3.16.

5. Applicable only if Output 2 is configured as a Recorder Output.

6. See Subsection 4.3.17.

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4.2.1

Type 1 Message

L {N} ? ? *

This message is used by the master device to determine whether the addressed slave

is active. The reply from the slave instrument, if it is active, is

L {N} ? A *

An inactive instrument will give no reply.

4.2.2

Type 2 Message

L {N} {P} {C} *

This type of message is used by the master device to interrogate or modify a parameter

in the addressed instrument. {P} identifies the parameter (as defined in Table 4-2) and

{C} represents the command to be executed, which may be one of the following:

+ (Hex 2B) - Increment the value of the parameter defined by {P}

– (Hex 2D) - Decrement the value of the parameter defined by {P}

? (Hex 3F) - Determine the current value of the parameter defined by {P}

The reply from the addressed instrument is of the form:

L {N} {P} {DATA} A *

where {DATA} comprises five ASCII-coded digits whose format is shown in Table 4-1.

The data is the value requested in a query message or the new value of the parameter

after modification. If the action requested by the message from the master device would

result in an invalid value for that parameter (either because the requested new value

would be outside the permitted range for that parameter or because the parameter is

not modifiable), the instrument replies with a negative acknowledgement:

L {N} {P} {DATA} N *

The {DATA} string in the negative acknowledgement reply will be indeterminate.

Scan Tables

A parameter identifier character “]” in the message from the master device indicates

that a “Scan Table” operation is required. This provides a facility for interrogating the

values of a group of parameters and status in a single message from the master

device. The reply to such a command would be in the form:

L {N} ] 25 aaaaa bbbbb ccccc ddddd eeeee A *

The digits aaaaa, bbbbb etc. are expressed as shown in Table 4-1. For further

information, refer to Subsection 4.3.17.

4.2.3

Type 3 Message

L {N} {P} # {DATA} *

This message type is used by the master device to set a parameter to the value

specified in {DATA}. The command is not implemented immediately by the slave

instrument; the slave will receive this command and will then wait for a Type 4 message

(see below). Upon receipt of a Type 3 message, if the {DATA} content and the specified

parameter are valid, the slave reply is of the form:

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RS485 Serial Communications

L {N} {P} {DATA} I *

(where I = Hex 49) indicating that the instrument is ready to implement the command. If

the parameter specified is invalid or is not modifiable or if the desired value is outside

the permitted range for that parameter, the instrument replies with a negative

acknowledgement in the form:

L {N} {P} {DATA} N *

4.2.4

Type 4 Message

L {N} {P} I *

This type of message is sent by the master device to the addressed slave following a

successful Type 3 message transmission and reply to/from the same slave instrument.

Provided that the {DATA} content and the parameter specified in the preceding Type 3

message are still valid, the slave will then set the parameter to the desired value and

will reply in the form:

L {N} {P} {DATA} A *

where {DATA} is the new value of the parameter. If the new value or parameter

specified is invalid, the slave will reply with a negative acknowledgement in the form:

L {N} {P} {DATA} N *

where {DATA} is indeterminate. If the immediately-preceding message received by the

slave was not a Type 3 message, the Type 4 message is ignored.

4.3

INDIVIDUAL PARAMETERS

The individual parameters and how they may be interrogated/modified are described

below. Unless otherwise stated, the {DATA} element will follow the standard five-digit

format and the decimal point position must be correct for the new value to be accepted

and for modification to occur.

NOTE: The communications identifier character {P} for each

parameter is shown to the right of each subsection heading.

4.3.1

Process Variable

{P} = M

This parameter may be interrogated only, using a Type 2 message. If the process

variable is out of range, the five-digit {DATA} field in the reply will not contain a number,

but will contain <??>0 (over-range) or <??>5 (under-range).

4.3.2

Process Variable Offset

{P} = J

This parameter may be modified/interrogated using a Type 2 message or a Type 3/4

message sequence. It modifies the actual process variable value (as measured at the

instrument’s input terminals) in the following manner:

Modified PV value = Actual PV value + process variable offset value

The modified PV value is limited by Range Maximum and Range Minimum and is used

for display and alarm purposes and for recorder outputs.

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RS485 Serial Communications

Product Manual - Volume I

NOTE: This parameter value should be selected with care. Any

adjustment to this parameter is, in effect, an adjustment to the

instrument’s calibration. Injudicious application of values to this

parameter could lead to the displayed PV value having no meaningful

relationship to the actual PV value.

4.3.3

Scale Range Maximum

{P} = G

This parameter (which is adjustable only on DC linear inputs) may be interrogated using

a Type 2 message or may be modified using a Type 3/4 message sequence. The

decimal point position is as for the input range.

4.3.4

Scale Range Minimum

{P} = H

This parameter (which is adjustable only on DC linear inputs) may be interrogated using

a Type 2 message or may be modified using a Type 3/4 message sequence. The

decimal point position is as for the input range.

4.3.5

Scale Range Decimal Point Position

{P} = Q

Adjustable on DC linear inputs only, this parameter may be modified/interrogated using

a Type 2 message or a Type 3/4 message sequence. The value of this parameter

defines the decimal point position, as follows:

Value

Decimal Point Position

abcd

abc.d

ab.cd

a.bcd

4.3.6

Input Filter Time Constant

{P} = m

This parameter may be modified/interrogated using a Type 2 message or a Type 3/4

message sequence.

4.3.7

Recorder Output Scale Maximum Value

{P} = [

This parameter may be modified/interrogated using a Type 2 message or a Type 3/4

message sequence. It defines the maximum scale value for the Controller’s Recorder

Output and may be adjusted within the range –1999 to 9999. This value corresponds to

the Input Scale Maximum and the decimal point position will always be the same as

that for the input.

NOTE: If this parameter is set to a value less than the Recorder Output

Minimum Value, the sense of the Recorder Output is reversed.

4.3.8

Recorder Output Scale Minimum Value

{P} = \

This parameter may be modified/interrogated using a Type 2 message or a Type 3/4

message sequence. It defines the minimum scale value for the Controller’s Recorder

Output and may be adjusted within the range –1999 to 9999. This value corresponds to

4-6

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Section 4

Product Manual - Volume I

RS485 Serial Communications

the Input Scale Minimum and the decimal point position will always be the same as that

for the input.

NOTE: If this parameter is set to a value greater than the Recorder

Output Maximum Value, the senseoftheRecorderOutputisreversed.

4.3.9

Alarm 1 Value

{P} = C

This parameter may be modified/interrogated using a Type 2 message or a Type 3/4

message sequence. It defines the level at which Alarm 1 will go active. The decimal

point position is as for the input range.

4.3.10

Alarm 1 Hysteresis Value

{P} = D

This parameter may be modified/interrogated using a Type 2 message or a Type 3/4

message sequence. It defines the hysteresis band applied to the “safe” side of Alarm 1.

The decimal point position is as for the input range.

4.3.11

Alarm 2 Value

{P} = E

This parameter may be modified/interrogated using a Type 2 message or a Type 3/4

message sequence. It defines the level at which Alarm 2 will go active. The decimal

point position is as for the input range.

4.3.12

Alarm 2 Hysteresis Value

{P} = F

This parameter may be modified/interrogated using a Type 2 message or a Type 3/4

message sequence. It defines the hysteresis band applied to the “safe” side of Alarm 2.

The decimal point position is as for the input range.

4.3.13

Alarm 3 Value

{P} = N

This parameter may be modified/interrogated using a Type 2 message or a Type 3/4

message sequence. It defines the level at which Alarm 3 will go active. The decimal

point position is as for the input range.

4.3.14

Alarm 3 Hysteresis Value

{P} = O

This parameter may be modified/interrogated using a Type 2 message or a Type 3/4

message sequence. It defines the hysteresis band applied to the “safe” side of Alarm 3.

The decimal point position is as for the input range.

4.3.15

Instrument Status

{P} = L

This parameter may be interrogated only, using a Type 2 message. The status

information is encoded in the four digits as the decimal representation of a binary

number. Each bit in the binary number has a particular significance:

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Bit 0: Alarm 1 Status

(0 = Active; 1 = Safe)

0 0 0

Bit 5: Alarm 1 Latched

(1 = not latched, 0 = latched)

If non-latching, fixed at 1.

Bit 1: Alarm 2 Status

(0 = Active; 1 = Safe)

Bit 3: Change Indicator (1 = A parameter other than

Instrument Status or Process Variable has been

changed via the front panel since the last time the

Status Byte was read; 0 = No change has occurred).

Bit 2: Alarm 3 Status

(0 = Active; 1 = Safe)

4.3.16

Instrument Commands

{P} = Z

Only Type 3 or Type 4 messages are allowed with this parameter. In the Type 3

message, the {DATA} field must be one of four five-digit numbers. The reply from the

instrument also contains the {DATA} field with the same content. When the master

device issues the Type 4 message, the instrument responds with the same {DATA} field

content. The commands corresponding to the {DATA} field value are:

00150 = Unlatch Alarm 1 (returns NAK if Alarm 1 is non-latching)

00160 = Reset Process Variable Maximum (to current PV value)

00170 = Reset Process Variable Minimum (to current PV value)

00180 = Reset Time Elapsed (to zero)

4.3.17

Scan Table

{P} = ]

The Scan Table operation takes the form of a Type 2 interrogation command which

accesses a set of information (held in the {DATA} element in the response). The

response would be in the form:

L {N} ] 25 aaaaa bbbbb ccccc ddddd eeeee A *

These digits are as described in Table 4-1 and comprise:

aaaaa

bbbbb

ccccc

ddddd

eeeee

The current process variable value

The current maximum process variable value

The current minimum process variable value

The current Time Elpased value

The Instrument Status (see Subsection 4.3.15).

4.3.18

Error Response

The circumstances under which a message from the master device is ignored are:

Parity error detected

Syntax error detected

Timeout elapsed

Receipt of a Type 4 message without a preceding Type 3 command mes-

sage.

Negative acknowledgements will be returned if, in spite of the received message being

notionally correct, the instrument cannot supply the requested information or perform

the requested operation. The {DATA} element of a negative acknowledgement will be

indeterminate.

4 -8

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Section 4

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RS485 Serial Communications

4.4

MODBUS PROTOCOL

With the RS485 Serial Communication option fitted and configured, communication

between a master device and slave instruments via protocol conforming to the

MODBUS industry standard is available.

NOTE: Support for multi-parameter Write operations is limited to

support of the Multi-word Write Function (Number 16) but this permits

writing of one parameter value only per message.

The parameter numbering system divides the parameters into bits and words, each

group being numbered independently.

4.4.1

Bit Parameters

There are up to 11 bit parameters:

Parameter

No.

Operation

Notes

Alarm 1 Status

Alarm 2 Status

Alarm 3 Status

Alarm 1 Latched

PV Under-range Flag

PV Over-range Flag

Sensor Break Active

Reset Latched Alarm

Reset PV Maximum

Reset PV Minimum

Reset Time Elapsed

Read Only

Write Only

1 = Active

1 = Alarm 1 latched *

1 = Active

* Always returns 0 if Alarm 1 not configured to be latching.

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Product Manual - Volume I

4.4.2

Word Parameters

Parameter

No.

Operation

Notes

Process Variable (PV)

PV Maximum

PV Minimum

Time Elapsed

Instrument Status

PV Offset

Alarm 1 value

Alarm 2 value

Alarm 3 value

Alarm 1 Hysteresis

Alarm 2 Hysteresis

Alarm 3 Hysteresis

Filter Time Constant

Decimal Point Position

Scale Range Min.

Scale Range Max.

Read Only *

Read Only

Read/Write

Only if Alarm 2 is configured

Only if Alarm 3 is configured

Only if Alarm 2 is configured

Only if Alarm 3 is configured

Read/Write

Read Only for non-linear inputs

Recorder Output

Scale Max.

Only if Recorder Output is

configured

Recorder Output

Scale Min.

Read/Write

Only if Recorder Output is

configured

Manufacturer ID

Equipment ID

121

122

Read Only

= 231 (representing “W1")

number 8010

When the process variable is over-range or under-range or when a

sensor break condition occurs, the value returned is:

Condition

Hex.

Signed

Unsigned

Over-range

F700

F600

F800

–2304

–2560

–2048

63232

62976

63488

Under-range

Sensor Break condition

The PV Max. parameter will return the Over-range value or Sensor Break

value (as appropriate) if either condition has occurred since the PV Max.

parameter was last reset.

The PV Min. parameter will return the Under-range value or Sensor Break

value (as appropriate) if either condition has occurred since the PV Min.

parameter was last reset.

The Time Elapsed parameter will return the Over-range value if the

time exceeds 1000 minutes.

NOTE: All these parameters return signed values except Time Elapsed

(which is unsigned) and Instrument Status (in which Bits 0 - 6 of the

status byte return Bit Parameters 1 - 7 respectively - see Subsection 4.4.1)

4-10

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Appendix A

Product Manual - Volume I

Alphabetical Index

Alarm 3 (adjusting - comms.)

4-7

AL1 Indicator

Function

Alarm 3 Operator Mode display

2-2

3-3

AL2 Indicator

Function

Cold Junction Compensation

Disabled, indication of 2-3

Communications

AL3 Indicator

Function

Alarm Hysteresis

Alarm 1

ASCII protocol

Baud rates

4-1

Alarm 1 (adjusting - comms.)

4-7

Data format 4-1

End of Message character

4-2

Alarm 2

3-3

Alarm 2 (adjusting - comms.)

4-7

Line release time maximum

value

4-1

Alarm 3

3-4

Line turn-round

Messsage types

4-1

4-2

Alarm 3 (adjusting - comms.)

4-7

MODBUS bit parameters4-9

MODBUS protocol 4-9

Alarm Status Indicators

Functions 2-2

Alarm Value

Alarm 1

MODBUS word parameters

4-10

3-3

Parity (ASCII protocol) 4-1

Alarm 1 (adjusting - comms.)

4-7

Parity (MODBUS protocol)

4-1

Alarm 1 Operator Mode display

2-2

Scan Tables command 4-4

Start of Message character

4-2

Alarm 2

3-3

Alarm 2 (adjusting - comms.)

4-7

Type 1 message 4-4

Type 2 message 4-4

Type 3 message 4-4

Type 4 message 4-5

Alarm 2 Operator Mode display

2-2

Alarm 3 3-4

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59039

Alphabetical Index

Product Manual - Volume I

Communications Message Format

4-1

Scale range maximum (adjusting

- comms.)

4-6

Scale range minimum 3-4

Scale range minimum (adjusting

Display Strategy (Operator Mode)

3-5

- comms.)

4-6

Process Variable

Error Responses

4-8

Interrogating (comms.) 4-5

Operator Mode display 2-1 -

2-2

Hardware Definition Code

Viewing in Operator Mode

Process Variable Maximum

Operator Mode display 2-1

2-4

Hardware Option

Resetting (from front panel)

2-2

Viewing in Operator Mode

2-4

Resetting (via comms. link)

4-8

Input Filter Time Constant

Adjusting (comms.)

3-4

4-6

2-3

Process Variable Minimum

Operator Mode display 2-1

Input Over-range Display

Input Under-range Display

Instrument Commands

Resetting (from front panel)

2-2

Resetting (via comms. link)

4-8

Instrument Status

4-7

Process Variable Offset 3-4

Adjusting (comms.)

4-5

Latched Alarm

Resetting (from front panel)

2-3

Recorder Output

Reversing sense of 3-5 - 4-7

Scale maximum 3-5

Scale Maximum Value (adjusting

Resetting (via comms. link)

4-8

Linear Input

- comms.) 4-6

Reversing sense of 3-4 - 3-5

Scale Range Decimal Point

Scale minimum

Scale Minimum Value (adjusting

- comms.) 4-6

3-5

Position

4-6

Scale range maximum 3-5

A-2

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Appendix A

Product Manual - Volume I

Alphabetical Index

Scan Tables Command 4-8

Sensor Break Indication

Operator Mode

Set Up Mode

Automatic exit from

2-3

3-5

Entry into

Exit from

3-1

3-5

Set Up Parameters All At default

Indication of 3-1

Time Elapsed

Operator Mode display 2-2

Resetting (from front panel)

2-2

Resetting (via comms. link)

4-8

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Product Manual - Volume I

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₈¹-DIN Digital Indicator

Product Manual - Volume II

¹₈-DIN DIGITAL INDICATOR

PRODUCT MANUAL

VOLUME II

INSTALLATION AND

CONFIGURATION INSTRUCTIONS

The procedures described in this volume must be

undertaken by technically competent servicing personnel.

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59039

Product Manual - Volume II

Contents

INSTALLATION

1-1

2-1

3-1

INTERNAL LINKS AND SWITCHES

CONFIGURATION MODE

Appendices

PRODUCT SPECIFICATION

ALPHABETICAL INDEX

A-1

B-1

(ii)

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Section 1

Product Manual - Volume II

Installation

SECTION 1

INSTALLATION

1.1

UNPACKING PROCEDURE

1. Remove the instrument from its packing. The instrument is supplied with a

panel gasket and push-fit fixing strap. Retain the packing for future use,

should it be necessary to transport the instrument to a different site or to

return it to the supplier for repair/testing.

2. Examine the delivered items for damage or deficiencies. If any is found,

notify the carrier immediately.

1.2

PANEL-MOUNTING

The panel on which the instrument is to be mounted must be rigid and may be up to

6.0mm (0.25 inches) thick. The cut-out required for a single Digital Indicator is as

shown in Figure 1-1.

45mm

+0.5 - 0.0

92mm

+0.5 - 0.0

Figure 1-1

Cut-out Dimensions

The Digital Indicator is 100mm deep (measured from the rear face of the front panel).

The front panel is 48mm high and 96mm wide. When panel-mounted, the front panel

projects 10mm from the mounting panel. The main dimensions of the instrument are

shown in Figure 1-2.

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Product Manual - Volume II

Figure 1-2

Main Dimensions

To panel-mount the instrument:

1 . Insert the rear of the housing through the cut-out (from the front of the

mounting panel) and hold the instrument lightly in position against the panel.

Ensure that the panel gasket is not distorted and that the instrument is

positioned squarely against the mounting panel. Apply pressure to the front

panel bezel only.

CAUTION: Do not remove the panel gasket, as this may result in

inadequate clamping of the instrument in the panel.

2 . Slide the fixing strap in place (see Figure 1-3) and push it forward until it is

firmly in contact with the rear face of the mounting panel (the tongues on the

strap should have engaged in matching rachet positions on the housing and

the fixing strap springs should be pushing firmly against the mounting panel

rear face).

Once the instrument is installed in its mounting panel, it may be subsequently removed

from its housing, if necessary, as described in Subsection 2.1.

1 -2

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Section 1

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Installation

Front panel

Mounting panel

Sealing gasket

Tongues on fixing strap

engage in ratchet slots

on housing

Housing

Fixing strap

TOP VIEW OF INSTRUMENT

Figure 1-3

Panel-Mounting

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Product Manual - Volume II

1.3

CONNECTIONS AND WIRING

The rear terminal connections are illustrated in Figure 1-4.

Output 1 is always a relay output which may be used as Alarm 1 (latching or

non-latching) or the logical OR of Alarms 1 & 2.

Output 2 (option) may be a relay output (Alarm 2, Alarm 3 or logical OR of Alarms

1 & 2, 1 & 3 or 2 & 3) or a DC output (recorder output)

Output 3 (option) may be a relay output (Alarm 2, Alarm 3 or logical OR of Alarms

1 & 2, 1 & 3 or 2 & 3) or a transmitter power supply output

Figure 1-4

Rear Terminal Connections

1-4

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Section 1

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Installation

1.3.1

Mains (Line) Input

The instrument will operate on 96 - 264V AC 50/60Hz mains (line) supply. The power

consumption is approximately 4 VA.

CAUTION: This equipment is designed for installation in an enclosure

which provides adequate protection against electric shock. Local

regulations regarding electrical installation should be rigidly observed.

Consideration should be given to prevention of access to the power

terminations by unauthorised personnel. Power should be connected

via a two-pole isolating switch (preferably situated near the equipment)

and a 1A fuse, as shown in Figure 1-5.

Figure 1-5

Mains (Line) Supply Connections

If the instrument has relay outputs in which the contacts are to carry

mains (line) voltage, it is recommended that the relay contact mains

(line) supply should be switched and fused in a similar manner but

should be separate from the instrument mains (line) supply.

1.3.2

24V (Nominal) AC/DC Supply

The supply connections for the 24V AC/DC version are shown in Figure 1-6. Power

should be connected via a two-pole isolating switch and a 315mA slow-blow fuse

(anti-surge Type T).

Figure 1-6

24V AC/DC Supply Connections

The nominal 24V supply may be in the following ranges:

24V (nominal) AC 50/60Hz -

24V (nominal) DC -

20 - 50V

22 - 65V

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Product Manual - Volume II

Table 1-1 Thermocouple Cable Colour Codes

1-6

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Section 1

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Installation

1.3.3

Thermocouple Input

The correct type of thermocouple extension leadwire/compensating cable must be used

for the entire distance between the instrument and the thermocouple, ensuring that

correct polarity is observed throughout. Joints in the cable should be avoided, if

possible. The CJC facility must be enabled (normal conditions) for this input (see

Subsection 3.10).

NOTE: Do not run thermocouple cables adjacent to power-carrying

conductors. If the wiring is run in a conduit, use a separate conduit for

the thermocouple wiring. If the thermocouple is grounded, this must be

done at one point only. If the thermocouple extension lead is shielded,

the shield must be grounded at one point only.

The colour codes used on thermocouple extension leads are shown in Table 1-1.

1.3.4

RTD Input

The compensating lead should be connected to Terminal 3. For two-wire RTD inputs,

Terminals 2 and 3 should be linked. The extension leads should be of copper and the

resistance of the wires connecting the resistance element should not exceed 5 ohms

per lead (the leads should be of equal length).

1.3.5

Linear Input

For linear mA input ranges, connection is made to Terminals 1 and 4 in the polarity

shown in Figure 1-4. For linear mV and V ranges, connection is made to Terminals 2

and 3 in the polarity shown in Figure 1-4. For details of the linear input ranges available,

refer to Appendix A. If it is required to display the engineering units used, refer to

Subsection 2.4.

1.3.6

Remote Reset (Option)

With the Remote Reset option fitted, Terminals 16 and 17 may be connected to an

external switch/relay contacts or to a TTL-compatible logic signal, which is used to reset

the latched Alarm 1. For an external switch/relay contacts, an “open-closed” transition

will reset the latched alarm. For a TTL signal, a “Logic 1 - Logic 0" transition will reset

the latched alarm.

TTL levels:

Logic 1

Logic 0

>2.0V

<0.8V

NOTE: The Remote Reset option and the RS485 Serial

Communications option are mutually exclusive.

See also Subsection 3.3.2 and Appendix A.

1.3.7

The contacts are rated at 2A resistive at 120/240V AC.

1.3.8 DC Output

Relay Output

See Appendix A.

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Product Manual - Volume II

1.3.9

RS485 Serial Communications (Option)

The connections for the three-wire RS485 serial communications option (if fitted) are on

Terminals 16, 17 and 18, as shown in Figure 1-4. Where several instruments are

connected to one master port, the master port transceiver in the active state should be

capable of driving a load of 12kW per instrument; the master port transceiver in the

passive state must have pull-up/pull-down resistors of sufficiently low impedance to

ensure that it remains in the quiescent state whilst supplying up to ±100mA each to the

instrument’s transceivers in the high impedance state.

1 -8

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Section 2

Product Manual - Volume II

Internal Links and Switches

SECTION 2

INTERNAL LINKS AND SWITCHES

2.1

REMOVING THE INSTRUMENT FROM ITS HOUSING

To withdraw the instrument from its housing, simply grip the side edges of the front

panel (there is a finger grip on each edge) and pull the instrument forwards. This will

release the instrument from its rear connectors in the housing and will give access to

the PCBs. Take note of the orientation of the instrument for subsequent replacement

into the housing.The positions of the PCBs in the instrument are shown in Figure 2-1.

Output 2 Link Jumpers

(DC Output only)

Top edge of

front panel

Power Supply PCB

RS485 Serial Communications

Option PCB or

Remote Reset Option PCB

Input Link Jumpers

Output 2 Option PCB -

Relay Output (Alarm) or

DC Output (Recorder Output)

CPU PCB

Output 3 Option PCB -

Relay Output (Alarm) or

Transmitter Power Supply

REAR VIEW OF UNHOUSED INSTRUMENT

Figure 2-1

PCB Positions

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Internal Links and Switches

Product Manual - Volume II

Figure 2-2

Removing the Output 2/Output 3 Option PCBs

2 -2

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Section 2

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Internal Links and Switches

2.2

REMOVING/REPLACING THE OUTPUT 2/OUTPUT 3 OPTION PCBs

With the instrument removed from its housing:

1. Gently push the rear ends of the CPU PCB and Power Supply PCB apart

slightly, until the two tongues on each of the Output 2/Output 3 Option PCBs

become dis-engaged - see Figure 2-2B; The Output 2 Option PCB tongues

engage in holes in the Power Supply PCB and the Output 3 Option PCB

tongues engage in holes on the CPU PCB.

2 . Carefully pull the required Option PCB (Output 2 or Output 3) from its

connector (Output 2 Option PCB is connected to the CPU PCB and Output 3

Option PCB is connected to the Power Supply PCB) - see Figure 2-2C. Note

the orientation of the PCB in preparation for its replacement.

Adjustments may now be made to the link jumpers on the CPU PCB and (if DC output)

the Output 2 PCB. The replacement procedure is a simple reversal of the removal

procedure.

2.3

REMOVING/REPLACING THE RS485 COMMUNICATIONS OPTION PCB OR

REMOTE RESET OPTION PCB

The RS485 Communications Option PCB or Remote Reset Option PCB is mounted on

the inner surface of the Power Supply PCB and can be removed when the instrument is

removed from its housing (see Subsection 2.1) by pulling the Option PCB towards the

rear of the PSU PCB. Figure 2-3 illustrates the removal/replacement procedure. It is not

necessary to remove the Output 2/Output 3 Option PCBs to perform this procedure.

Figure 2-3

Removing/Replacing the RS485 Option PCB

or Remote Reset Option PCB

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Internal Links and Switches

Product Manual - Volume II

2.4

INSTALLING THE ENGINEERING UNIT LABEL

The instrument is equipped with a label carrier (see Figure 2-4) to which a self-adhesive

engineering unit label may be attached if required.

Power Supply

PCB

Front Panel

(top edge)

Display PCB

CPU PCB

Figure 2-4 Location of Label Carrier

Label Carrier

If the instrument is configured with a linear input and engineering units are to be

displayed on the front panel, the required unit label (see sheet of peel-off labels at the

rear of this manual) may be installed as follows:

1. Remove the instrument from its housing (see Subsection 2.1).

2. For the CPU PCB and Power Supply PCB simultaneously, gently bend

one retaining arm (see Figure 2-5A) to free one side of each PCB; swing

the PCBs clear of the front panel and carefully move them away from the

front panel (the CPU PCB will still be connected to the front panel/Display

PCB by a ribbon cable - do not stress this ribbon cable ).

3. Remove the label carrier from its aperture in the Display PCB (see Fig-

ure 2-5B).

4. Remove the required engineering unit label from the peel-off sheet at

the rear of this manual and affix to the front face of the label carrier (see

Figure 2-5C), using the ledge on the front face of the carrier for alignment.

5. Replace the label carrier in its aperture on the Display PCB.

6. Replace the CPU PCB and Power Supply PCB in position at the rear of

the front panel.

7. Replace the instrument in its housing (see Subsection 2.5).

2-4

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Section 2

Product Manual - Volume II

Internal Links and Switches

NOTE: Spare label carriers (Part No. 18633) and engineering label

sheets (Part No. 84107) are available.

Attach engineering unit label

TOP VIEW

to this face (ensuring that the

ledge is at the bottom)

FRONT VIEW

Ledge

Figure 2-5

Installing the Engineering Unit Label

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Section 2

₈¹-DIN Digital Indicator

59039

Internal Links and Switches

Product Manual - Volume II

2.5

REPLACING THE INSTRUMENT IN ITS HOUSING

To replace the instrument, simply align the CPU PCB and Power Supply PCB with their

guides and connectors in the housing and slowly but firmly push the instrument into

position.

CAUTION: Ensure that the instrument is correctly orientated. A stop

will operate if an attempt is made to insert the instrument in the wrong

orientation (e.g. upside-down). This stop must not be over-ridden.

2.6

SELECTION OF INPUT TYPE

The required input type is selected on link jumpers LJ1/LJ2/LJ3 on the CPU PCB (see

Figure 2-6 and Table 2-1).

Figure 2-6

CPU PCB Link Jumpers

Table 2-1 Input Type Selection

Input Type

CPU PCB Link Jumper Fitted)

RTD or DC (mV)

Thermocouple

DC (mA)

None (Parked)

LJ3

LJ2

LJ1

DC (V)

2-6

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Section 2

Product Manual - Volume II

Internal Links and Switches

2.7

OUTPUT 2 TYPE/OUTPUT 3 TYPE

The type of output for Output 2 and Output 3 is determined by the Option PCB fitted in

the appropriate position (see Figure 2-1) and, in the case of the DC Output 2 Option

PCB being fitted, the setting of Link Jumpers LJ8 and LJ9 on that Option PCB (see

Figure 2-7 and Table 2-2). There are three types of option PCB:

1. Relay Output Option PCB (no link jumpers) - Output 2 and Ouput 3

2. DC Output Option PCB (link jumpers as in Figure 2-7 and Table 2-2) -

Output 2 only

3. Transmitter Power Supply Option PCB - Output 3 only

Figure 2-7

DC Output 2 Option PCB

Table 2-2 DC Output 2 Type Selection

Output Type

Link Jumpers Fitted

DC (0 - 10V)

DC (0 - 20mA)

DC (0 - 5V

LJ8 (DC Output 2 Option PCB)

LJ9 (DC Output 2 Option PCB)

LJ8 (DC Output 2 Option PCB)

LJ9 (DC Output 2 Option PCB)

DC (4 - 20mA)

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Section 3

₈¹-DIN Digital Indicator

59039

Configuration Mode

Product Manual - Volume II

SECTION 3

CONFIGURATION MODE

3.1

ENTRY INTO CONFIGURATION MODE

To enter Configuration Mode:

1. Ensure that the instrument is powered-down.

2 . Power-up the instrument and, within ten minutes of power-up, hold down

the Raise and Scroll keys simultaneously for six seconds. If this is done

whilst the instrument is displaying the process variable value, the instrument

will enter/exit Set Up Mode - keep holding the keys down!

NOTE: This need not be the first key action after power-up.

The instrument will then enter Configuration Mode and the SET indicator will flash. The

user will then be presented with the first of a sequence of parameter displays; in each

instance, the parameter will be identified by a single-character legend in the units

display and the setting of that parameter will be shown in the four-digit display. The

user may then step through the parameters using the Scroll key. The setting may be

adjusted using the Raise/Lower keys. As soon as the value/setting is changed, the

four-digit display will flash, indicating that the new value/setting has yet to be confirmed

(this flashing is inhibited during actual adjustment). When the value/setting is as

required, it may be confirmed by:

(a) pressing the Scroll key, whereupon the four-digit display will show:

(b) pressing the Raise key.

The four-digit display will then show a static (non-flashing) display of the new parameter

setting. Depression of any key other than the Raise key at the SurE? display will cause

the original parameter setting to be retained. The sequence of parameter displays is

shown in Table 3-1.

NOTE: Changes to the value/setting of certain Configuration Mode

parameters (e.g. input range, output use and type) will cause the Set

Up Mode parameters to be automatically set to their default values the

next time Set Up Mode is entered (see also Volume 1, start of Section

3). It is recommended that all Configuration Mode parameters are

finalised before Set Up Mode parameters are adjusted.

3 -1

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Section 3

Product Manual - Volume II

Configuration Mode

Table 3-1 Configuration Mode Parameters

Parameter

Hardware Definition

Code

Legend

Available Settings

See Subsection 3.2

Default

2100

Hardware Option fitted

None fitted

RS485 Communications

Remote Latch Reset

Input Range

Alarm 1 Type

Defined by Input Code (see Sub-

section 3.4)

1419

AL1 ON

AL2 ON

Process High Alarm

Process Low Alarm

Not in use

Alarm 2 Type

Alarm 3 Type

Output 1 Use

Process High Alarm

Process Low Alarm

Not in use

AL3 ON

Process High Alarm

Process Low Alarm

Alarm 1, non-latching,

direct-acting

Alarm 1, non-latching,

reverse-acting

Alarm 1, latching,

direct-acting

Alarm 1, latching,

reverse-acting

Logical OR of Alarm 1 and

Alarm 2, direct-acting

Logical OR of Alarm 1 and

Alarm 2, reverse-acting

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Section 3

₈¹-DIN Digital Indicator

59039

Configuration Mode

Product Manual - Volume II

Table 3-1 (Cont.) Configuration Mode Parameters

Parameter

Legend

Available Settings

Default

Output 2 Use

Alarm 2, direct-acting

Alarm 2, reverse-acting

Alarm 3, direct-acting

Alarm 3, reverse-acting

Logical OR of Alarm 1 and

Alarm 2, direct-acting

Logical OR of Alarm 1 and

Alarm 2, reverse-acting

Logical OR of Alarm 1 and

Alarm 3, direct-acting

Logical OR of Alarm 1 and

Alarm 3, reverse-acting

Logical OR of Alarm 2 and

Alarm 3, direct-acting

Logical OR of Alarm 2 and

Alarm 3, reverse-acting

Recorder Output (PV)

Output 3 Use

Alarm 2, direct-acting

Alarm 2, reverse-acting

Alarm 3, direct-acting

Alarm 3, reverse-acting

Logical OR of Alarm 1 and

Alarm 2, direct-acting

Logical OR of Alarm 1 and

Alarm 2, reverse-acting

Logical OR of Alarm 1 and

Alarm 3, direct-acting

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Section 3

Product Manual - Volume II

Configuration Mode

Table 3-1 (Cont.) Configuration Mode Parameters

Parameter

Legend

Available Settings

Default

Output 3 Use (cont.)

Logical OR of Alarm 1 and

Alarm 3, reverse-acting

Logical OR of Alarm 2 and

Alarm 3, direct-acting

Logical OR of Alarm 2 and

Alarm 3, reverse-acting

Transmitter Power Supply

Communications

Baud Rate

1200, 2400, 4800 or 9600 Baud

4800

Communications

Address

1 - 32

Communications

Protocol

ASCII

MODBUS, odd parity

MODBUS, even parity

MODBUS, no parity

Cold Junction

Compensation

Enable/Disable

Enabled

Disabled

NOTES ON TABLE 3-1

1. Only appears in display sequence if Output 2 is fitted/configured in the Hardware

Definition Code (i.e. Digit 3 is non-zero).

2. Only appears in display sequence if Output 3 is fitted/configured in the Hardware

Definition Code (i.e. Digit 4 is non-zero).

3. Only appears in display sequence if the Hardware Option parameter is set to r485.

4. Only appears in display sequence if thermocouple input is fitted/configured

i.e. Digit 1 of Hardware Definition Code is set to 2 (see Subsection 3.2)

5. Only if Output 2 is configured as a relay output

6. Only if Output 2 is configured as a DC linear output

7. Only if Output 3 is configured as a relay output

8. Only if Output 3 is configured as a transmitter power supply output

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Section 3

₈¹-DIN Digital Indicator

59039

Configuration Mode

Product Manual - Volume II

3.2

HARDWARE DEFINITION CODE

This parameter is used to represent the hardware fitted (input type, Output 1 type,

Output 2 type and Output 3 type); this must be compatible with the hardware actually

fitted. Access to the Hardware Definition Code is gained by pressing the Scroll and

Lower keys simultaneously whilst the instrument is in Configuration Mode. The code is

used as follows:

Digit 1 - Input Type

Digit 4 - Output 3 Type

Meaning

Value

Meaning

Value

RTD/Linear DC (mV)

Thermocouple †

Linear DC (mA)

Linear DC (V)

Not fitted †

Relay

Transmitter Power Supply

Digit 3 - Output 2 Type

Value

Meaning

Output 1 always

relay output

Not fitted †

Relay

DC (0 - 10V)

DC (0 - 20mA)

DC (0 - 5V)

DC (4 - 20mA)

† Default setting

The maximum setting available for this code is 4178. For example, the code for an

instrument with a thermocouple input, relay Output 1, relay Output 2 and relay Output 3

would be 2111.

NOTE: It is essential that this code is changed promptly whenever

there is a change to the instrument’s hardware configuration (change

of input/output type, alarm/recorder output added/removed etc.). The

instrument software depends upon this code to ensure correct

operation.

This code may also be viewed as a Read Only display in Operator Mode (see Volume

1, Subsection 2.9).

3.3

HARDWARE OPTION

There are two hardware options available - RS485 Serial Communications and Remote

Latching Alarm Reset. These options are mutually exclusive. Access is gained to the

Hardware Option parameter by pressing the Scroll key whilst the Hardware Definition

Code is displayed in Configuration Mode. The Hardware Option display may be viewed

as a Read Only display in Operator Mode (see Volume 1, Subsection 2.9)

3-5

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Section 3

Product Manual - Volume II

Configuration Mode

3.3.1

RS485 Serial Communications Option

For this option, the protocol used is defined by the Communications Protocol

parameter - see Subsection 3.9. Full details of communications operation are given in

Volume 1, Section 4.

3.3.2

Remote Latching Alarm Reset Option

This option has the same effect as resetting the latching Alarm 1 (see Output 1 Use

parameter in Table 3-1) from the front panel. The latched Alarm 1 can be reset only if

the original alarm condition has been cleared; this reset has no effect whilst the alarm

condition prevails. See also Appendix A for more details of this option.

3.4

INPUT RANGE

The default setting of this parameter is dependent upon the input hardware fitted, as

indicated by the first (left-most) digit of the Hardware Definition Code (see Subsection

3.2):

Input Hardware Fitted

Thermocouple

RTD/Linear mV)

Linear mA

Default Setting

1419 (Type “J”, 0 to 761 C)

7220 (RTD Pt100, 0 to 800 C)

3414 (4 to 20mA)

Linear V

4446 (0 to 10V)

If the Hardware Definition Code is at its default setting, input code 1419 will be

displayed. The input ranges and codes available are listed in Appendix A.

3.5

ALARM TYPE

The operation of the different alarm types is shown in Volume 1, Figure 3-1.

3.6

LOGICAL COMBINATION OF ALARMS

Output 1, 2 or 3 may be used as a relay output representing a logic OR of two alarms.

EXAMPLE OF LOGICAL COMBINATION OF ALARMS

Logical OR of Alarm 1 with Alarm 2

Alarm Status

Relay State

Alarm 1

Alarm 2

OFF

Direct-acting

Reverse-acting

Energised

OFF

De-energised

Energised

De-energised

OFF

3.7

COMMUNICATIONS BAUD RATE

This parameter must be set to the same Baud rate as the communications port on the

master device.

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Section 3

₈¹-DIN Digital Indicator

59039

Configuration Mode

Product Manual - Volume II

3.8

COMMUNICATIONS ADDRESS

This is the unique address assigned to the instrument; it is used by the master device to

communicate with the instrument.

3.9

COMMUNICATIONS PROTOCOL

There are two communications protocols available: ASCII (fixed, even parity) and

MODBUS (selectable odd parity, even parity or no parity). Refer to Volume 1, Section 4

for details.

3.10 COLD JUNCTION COMPENSATION

This parameter is applicable only if a thermocouple input is fitted, in which case it must

be enabled in normal use.

NOTE: If a thermocouple input is fitted and the CJC is disabled, in

Operator Mode whenever the process variable is displayed, the unit

display will show:

3.11 EXIT FROM CONFIGURATION MODE

To leave Configuration Mode, either (a) press the Raise and Scroll keys simultaneously

or (b) power-down then power up again. Either action will cause a return to the

Operator Mode.

NOTE: An automatic return to Operator Mode is made if, in

ConfigurationMode, thereisnofrontpanelkeyactivityforfiveminutes.

The exit is made via the power-up self-test routines which include an LED indicator test.

3-7

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₈¹-DIN Digital Indicator

Appendix A

Product Manual - Volume II

Product Specification

APPENDIX A

PRODUCT SPECIFICATION

UNIVERSAL INPUT

General

Maximum per Instrument:

Input Sample Rate:

One

Four samples/second

Digital Input Filter:

Time constant selectable from front

panel - 0.0 (i.e. OFF), 0.5 to 100.0

seconds in 0.5-second increments.

Input Resolution:

Input Impedance:

14 bits approximately; always four times

better than display resolution.

Greater than 100M W resistive (except

for DC mA and V inputs).

Isolation:

Isolated from all outputs at 240V AC.

Process Variable Offset:

Adjustable æinput span.

Thermocouple

Ranges selectable from front panel:

Displayed

Code

Displayed

Code

Type

Input Range

Type

Input Range

1127

1128

1227

1228

1415

1416

1417

1418

1419

1420

1525

1526

1541

1542

6726

6727

6709

6710

1815

1816

1817

1818

1819

1820

1934

1938

5371

5324

0 - 1650°C

32 - 3002°F

0 - 1649°C

-200 - 760°C

- 328 - 1399°F

-200 - 1373°C

- 328 - 2503°F

0.0 - 205.7 °C

32.0 - 402.2°F

0 - 450 °C

32 - 3000°F

0.0 - 205.4 °C

32.0 - 401.7°F

0 - 450 °C

32 - 842°F

32 - 841°F

0 - 761°C *

0 - 762°C

32 - 1401°F

-200 - 262°C

- 328 - 503°F

0.0 - 260.6 °C

32.0 - 501.0°F

32 - 1403°F

211 - 3315°F

100 - 1824°C

0 - 1399°C

32 - 2550°F

* Default setting

SM067-A

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Appendix A

₈¹-DIN Digital Indicator

59039

Product Specification

Product Manual - Volume II

Calibration:

Complies with BS4937, NBS125 and

IEC584.

Sensor Break Protection:

Break detected within two seconds.

Alarms operate as if the process

variable has gone over-range.

Resistance Temperature Detector (RTD)

Ranges selectable from front panel:

Displayed

Code

Displayed

Input Range

Code

7220

7221

2229

2230

Code

2297

2298

7222

7223

2231

2251

2295

2296

0 - 800°C *

32 - 1471°F

-149.7 - 211.9 °F

0 - 300°C

- 200 - 206°C

- 328 - 402°F

32 - 571°F

0.0 - 100.9°C

32.0 - 213.6 °F

- 100.9 - 537.3 °C

-149.7 - 999.1 °F

-100.9 - 100.0 °C

* Default setting

Type and Connection:

Calibration:

Three-wire Pt100

Complies with BS1904 and DIN43760.

Automatic scheme.

Lead Compensation:

RTD Sensor Current:

Sensor Break Protection:

150mA (approximately)

Break detected within two seconds.

Alarms operate as if the process

variable has gone over-range.

DC Linear

Ranges Selectable from Front Panel:

Input

Range

Displayed

Code

Input

Range

Displayed

Code

Input

Range

Displayed

Code

Input

Range

Displayed

Code

0 - 20mA

4 - 20mA*

3413

3414

0 - 50mV

4443

4499

0 - 5V

1 - 5V

4445

4434

0 - 10V*

2 - 10V

4446

4450

10 - 50mV

* Default setting

(Changes may also be required to the CPU PCB link jumpers - see Subsection 7.4.1.)

Scale Range Maximum:

Scale Range Minimum:

Minimum Span:

–1999 to 9999. Decimal point as

required.

–1999 to 9999. Decimal point as for

Scale Range Maximum.

1 display LSD.

A-2

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₈¹-DIN Digital Indicator

Appendix A

Product Manual - Volume II

Product Specification

Sensor Break Protection:

Applicable to 4 - 20mA, 1 - 5V and 2 -

10V ranges only. Break detected within

two seconds. Alarms operate as if the

process variable has gone under-range.

REMOTE RESET INPUT (Option)

Type:

Voltage-free, TTL-compatible

May be connected to:

External switch/relay contacts or

TTL-compatible logic signal.

Reset caused by:

Open-close transition (external

switch/relay contacts) or “1" - ”0" logic

transition (TTL logic signal).

Maximum Input Delay

(open - closed or “1" - ”0"):

1 second

Minimum Input delay

(closed - open or “0" - ”1"):

External switch/relay contacts:

Maximum Contact Resistance

(Closure):

50W

Minimum Contact Resistance

(Open):

5000W

External TTL Logic Signal:

Maximum Voltage (TTL) for “0":

Minimum Voltage (TTL) for “0":

Minimum Voltage (TTL) for “1":

Maximum Voltage (TTL) for “1":

OUTPUT 1

0.8V

–0.6V

2.0V

24.0V

General

Type:

Relay.

Contact Type:

Single pole double throw (SPDT).

2A resistive at 120/240V AC.

Rating:

Lifetime:

>500,000 operations at rated

voltage/current.

Isolation:

Inherent.

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Appendix A

₈¹-DIN Digital Indicator

59039

Product Specification

Product Manual - Volume II

OUTPUT 2 (Option)

General

Types Available:

Relay

Relay and DC.

Contact Type:

Rating:

Single pole double throw (SPDT).

2A resistive at 120/240V AC.

Lifetime:

>500,000 operations at rated

voltage/current.

Isolation:

Inherent.

Resolution:

Eight bits in 250mS (10 bits in 1 second

typical, >10 bits in >1 second typical).

Update Rate:

Ranges:

Approximately 4/second.

0 - 20mA, 4 - 20mA, 0 - 10V, 0 - 5V, 1 -

5V, 2 - 10V

(Changes between V and mA ranges also require link jumper movement.)

Load Impedance:

0 - 20mA: 500W maximum

4 - 20mA: 500W maximum

0 - 10V: 500W minimum

0 - 5V: 500W minimum

1 - 5V: 500W minimum

2 - 10V: 500W minimum

Isolation:

Isolated from all other inputs and

outputs.

Range Selection Method:

Link jumper and front panel code.

Relay and Transmitter Power Supply

OUTPUT 3 (Option)

General

Types Available:

Relay

Contact Type:

Rating:

Single pole double throw (SPDT).

2A resistive at 120/240V AC.

Lifetime:

>500,000 operations at rated

voltage/current.

Isolation:

Inherent.

A -4

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59039

₈¹-DIN Digital Indicator

Appendix A

Product Manual - Volume II

Product Specification

Transmitter Power Supply

Output:

20 - 28V DC (24V DC nominal).

Minimum Load Impedance:

ALARM CONTROL

Maximum Number of Alarms:

910W (22mA @ 20V DC).

Three

Max. No. of Outputs Available: All three outputs can be alarm outputs.

Combinatorial Alarms:

Logical OR of alarms to an individual

hardware output is available.

COMMUNICATIONS

Type:

Serial asynchronous UART-to-UART

link.

Data Format:

ASCII: One start bit, even parity, seven

data bits, one stop bit.

MODBUS: as above with odd, even or

no parity

Physical Layer:

RS485

Presentation Layer:

Maximum Number of Zones:

Baud Rate:

ASCII or MODBUS

Selectable from 9600, 4800, 2400 or

1200 Baud.

Zone Address Selection:

Selectable from front panel in the range

1 - 32.

PERFORMANCE

Reference Conditions

Generally as BS5558.

20^oC ±2^oC

Ambient Temperature:

Relative Humidity:

Supply Voltage:

60 - 70%

90 - 264V AC 50Hz ±1%

<10W for thermocouple input

<0.1W/lead balanced (Pt100)

Source Resistance:

Lead Resistance:

Performance Under Reference Conditions

Common Mode Rejection: >120dB at 50/60Hz giving negligible

effect at up to 264V 50/60Hz.

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Appendix A

₈¹-DIN Digital Indicator

59039

Product Specification

Product Manual - Volume II

Series Mode Rejection:

>500% of span (at 50/60Hz) causes

negligible effect.

DC Linear Inputs

Measurement Accuracy:

Thermocouple Inputs

Measurement Accuracy:

±0.05% of span ±1LSD.

±0.25% of span ±1LSD. NOTE:

Reduced performance with Type “B”

Thermocouple between 100 - 600 ^oC

(212 - 1112^oF).

Better than ±0.2 ^oC any point, any 0.1 ^oC

range (± 0.05^oC typical). Better than

±0.5 ^oC any point, any 1 ^oC range.

Linearisation Accuracy:

Better than ±0.7 ^oC.

Cold Junction Compensation:

RTD Inputs

Measurement Accuracy:

Linearisation Accuracy:

±0.25% of span ±1LSD

Better than ±0.2 ^oC any point, any 0.1 ^oC

range (± 0.05^oC typical). Better than

±0.5 ^oC any point, any 1 ^oC range.

DC Output 2 (Recorder Output)

Accuracy:

±0.25% (mA @ 250W, V @ 2kW );

Degrades linearly to ±0.5% for

increasing burden (to specification

limits). Degrades to ± 4% in the

frequency band 52 - 80MHz for

line-conducted disturbances induced by

RF fields (10V 80% AM 1kHz).

Operating Conditions

Ambient Temperature (Operat-

ing):

0 ^oC to 55^oC

Ambient Temperature (Storage): –20 ^oC to 80^oC

Relative Humidity:

Supply Voltage:

20% - 95% non-condensing

90 - 264V AC 50/60Hz (standard)

20 - 50V AC 50/60Hz or 22 - 65V DC

(option)

Source Resistance:

1000 W maximum (thermocouple)

A -6

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59039

₈¹-DIN Digital Indicator

Appendix A

Product Manual - Volume II

Product Specification

Lead Resistance:

50W per lead maximum balanced

(Pt100)

Performance Under Operating Conditions

Temperature Stability:

0.01% of span/^oC change in ambient

temperature.

Cold Junction Compensation

(thermocouple Only):

Better than ±1^oC.

Negligible.

Supply Voltage Influence:

Relative Humidity Influence:

Sensor Resistance Influence:

Negligible

Thermocouple 100W: <0.1% of span

error

Thermocouple 1000 W : <0.5% of span

error

RTD Pt100 50W /lead: <0.5% of span

error

ENVIRONMENTAL

Operating Conditions:

EMI Susceptibility:

EMI Emissions:

See PERFORMANCE .

Designed to meet EN50082 Part 2.

Designed to meet EN500081 Part 2.

Safety Considerations:

Designed to comply with IEC 1010-1 in

as far as it is applicable.

Supply Voltage:

90 - 264V AC 50/60Hz (standard)

20 - 50V AC 50/60Hz or 22 - 65V DC

(option)

Power Consumption:

Front Panel Sealing:

4 watts approximately.

To IP65 (similar to NEMA 4)

PHYSICAL

Dimensions:

Depth - 100mm approximately

Front Panel:

Width - 48mm, Height - 96mm (¹₈-DIN)

Mounting:

Terminals:

Weight:

Plug-in with panel mounting fixing strap.

Panel cut-out 45mm x 92mm.

Screw type (combination head) plus

“telecom” type socket.

0.48kg (1.06lb) maximum

SM067-A

November, 2000

A-7

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Appendix B

₈¹-DIN Digital Indicator

59039

Alphabetical Index

Product Manual - Volume II

Alphabetical Index

AC/DC (24V) Supply

Fuse rating 1-5

DC Linear Input

Ranges available A-2

DC Output

Terminal connections

1-5

Voltage ranges

Alarm Type

1-5

Terminal connections

1-7

Selection of 3-6

Engineering Unit Label

Installing 2-4

CJC Disabled Display

Hardware Definition Code

Explanation of

Thermocouple inputs only

3-7

3-5

Cold Junction Compensation

Enabling/disabling

Communications

Viewing/changing 3-5

Hardware Option Setting

Viewing/changing 3-5

3-7

Baud rate, selection of 3-6

Input Range

Terminal connections

Communications Address

Selection of 3-7

1-8

Selection of 3-6

Input Type

Communications Option

Selection of 3-6

Selection of 2-6

Instrument Dimensions

A-7

Communications Option PCB

Removal/replacement 2-3

Communications Protocol

Selection of 3-7

Configuration Mode

Automatic exit from

Label Carrier

Location of

Linear Input

2-4

Terminal connections

Logical Combination of Alarms

Example of 3-6

1-7

3-7

Entry into

Exit from

3-1

3-7

CPU PCB

Link jumpers 2-6

B-1

November, 2000

SM067-B

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59039

₈¹-DIN Digital Indicator

Appendix B

Product Manual - Volume II

Alphabetical Index

Remote Reset Option

Selection of 3-6

Remote Reset Option PCB

Removal/replacement 2-3

Mains (Line) Input

Fuse rating 1-5

Terminal connections

Voltage range 1-5

1-5

Removing the Indicator from its Housing

2-1

Output 2 DC Option PCB

Link jumpers 2-7

Replacing the Indicator in its Housing

2-6

RTD Input

Output 2 Option PCB

Ranges available A-2

Removal/replacement 2-3

Output 2 Type

Terminal connections

1-7

Selection of 2-7

Sensor Break

Output 3 Option PCB

Effect on Alarm outputs (DC

linear inputs) A-3

Removal/replacement 2-3

Output 3 Type

Selection of 2-7

Effect on Alarm outputs (RTD

inputs) A-2

Effect on Alarm outputs

(thermocouple inputs) A-2

Panel-Mounting

Cut-out dimensions

Indicator dimensions

1-1

Thermocouple Input

Ranges available A-1

Terminal connections

Maximum panel thickness

1-1

1-7

Procedure

PCB Positions

Power Consumption

1-2

2-1

Unpacking Procedure

1-1

1-5

Rear Terminal Connections

Relay Output

1-4

1-7

Terminal connections

Remote Reset Input

Terminal connections

SM067-B

November, 2000

B-2

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Appendix B

₈¹-DIN Digital Indicator

59039

Alphabetical Index

Product Manual - Volume II

B-3

November, 2000

SM067-B

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