|
UM-TS03***-E020
PROGRAMMABLE CONTROLLER
PROSEC T3
ASCII INTERFACE MODULE
AS311
USER’S MANUAL
TOSHIBA CORPORATION
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Safety Precautions
Safety Precautions
• This module (AS311) has been designed for Toshiba’s Programmable Controller
PROSEC-T3 (hereafter called T3). Use this module only on the T3’s rack.
• Read the Safety Precautions described on the T3 User’s Manual before using the T3 and
this module.
• Follow the instructions described on this manual and on the T3 User’s Manual when
installing and wiring the T3 and this module.
• Do not touch the connector pins or components on the printed circuit board of this module.
• The maximum number of AS311s that can be controlled by one T3 is not limited by
software. However, this module consumes maximum 1 A of internal 5 Vdc power. Confirm
that the total 5 Vdc consumed current per one power supply module is within the limit (7A).
Symbols Used In This Manual
Pay attention to information preceded by the following symbols.
HINT
Refers to helpful suggestions on how to operate effectively.
NOTE
Refers to information considered essential for full understanding of operation.
And refers to conditions that could damage the equipment or render it
temporarily inoperative.
User’s Manual 1
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About This Manual
About This Manual
This manual explains the specifications and operations of the ASCII Interface Module
(AS311) for Programmable Controller T3. Read this manual carefully before using the
AS311 module.
Inside This Manual
This manual consists of six sections and an appendix as follows.
Section 1 Overview
Introduces The AS311. Outline of the function, applications and the external features are
provided in this section. Read this section at first to understand the general operation of
the AS311. The switch settings of this module are also explained in this section.
Section 2 Specifications
Provides the functional and the transmission specifications of the AS311. Refer to this
section to confirm the application limitations.
Section 3 Cable Connections
Provides the information for hardware preparations. The transmission cable connection
is explained in this section.
Section 4 Register Configuration
Explains the memory contents of the AS311. This information is important to interchange
data between T3 and AS311.
Section 5 Operation Procedure
Provides the information to design the T3 program for using the AS311. Some sample
programs are provided in this section. Read this section carefully for programming.
Section 6 RAS Information
Provides the helpful information for RAS (Reliability, Availability and Serviceability). Also,
lists the check points in case of unexpected operations.
Appendix
The specifications of READ and WRITE instructions are described. These instructions are
used for interchanging data between T3 and AS311.
2
ASCII Interface Module (AS311)
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About This Manual
Related Manuals
The following related manuals are available for T3. Besides this manual, read the following
manuals for your better understanding.
T3 User’s Manual - Hardware
This manual covers the T3’s main body and basic I/O - their specifications, handling,
maintenance and services.
T3 User’s Manual - Functions
This manual explains the functions of the T3 and how to use them. The necessary
information to create user program is covered in this manual.
T-series Instruction Set
This manual provides the detailed specifications of instructions for Toshiba’s T-series
Programmable Controllers.
T-PDS (Ver. 1.4) Basic Operation Manual
This manual explains how to install the T-series program development system (T-PDS)
into your computer and provides basic programming operations.
T-PDS (Ver. 1.4) Command Reference Manual
This manual explains the T-series program development system (T-PDS) in detail.
T-PDS (Ver. 1.6) Expanded Functions
This manual explains the expanded functions on the T-PDS version 1.6. This manual
supplements the T-PDS (Ver.1.4) Command Reference Manual.
T-series Computer Link Function
This manual provides the information for a computer to communicate with T3 through the
T-series Programmable Controller’s Computer Link function.
Terminology
The following terms and abbreviations are used in this manual.
• ASCII:
• EIA:
American Standard Code for Information Interchange
Electronic Industries Association
Input/Output
• I/O:
• LED:
Light Emitting Diode
• RS-232C:
• RS-422:
An EIA standard for data transmission
An EIA standard for data transmission
User’s Manual 3
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Contents
Contents
Safety Precautions
..................................................................................
..................................................................................
AS311 Overview ..........................................................................
1
2
7
About This Manual
1.
1.1
1.2
1.3
Introduction ......................................................................................
AS311 functions ...............................................................................
External features .............................................................................. 10
8
9
2.
Specifications ............................................................................ 15
2.1
2.2
2.3
General specifications ...................................................................... 16
Functional specifications ................................................................ 16
Transmission specifications ............................................................. 17
3.
Cable Connections
..................................................................... 19
3.1
3.2
RS-232C connection ......................................................................... 20
RS-422 connection ............................................................................ 21
4.
Register Configuration
.............................................................. 23
4.1
4.2
I/O allocation and I/O registers ........................................................ 24
AS311 buffer memory ........................................................................ 26
4.2.1
4.2.2
4.2.3
4.2.4
Memory map
Buffer memory access
Parameter area ............................................................................ 29
Receiving and transmitting data area .......................................... 36
............................................................................... 26
................................................................ 27
5.
Operation Procedure
................................................................. 37
5.1
5.2
Transmission message format .......................................................... 38
Received message read sequence .................................................. 39
5.2.1
5.2.2
5.3
5.3.1
5.3.2
5.4
5.5
5.6
5.7
Flag control timing
T3 sample program for message receiving ................................... 40
Write sequence for message transmitting ....................................... 43
Flag control timing ....................................................................... 43
T3 sample program for message transmitting ................................ 44
Checking the AS311 operation status .............................................. 47
Resetting the AS311 by software ...................................................... 48
Setting the trailing code .................................................................... 49
Setting the time-out check time ........................................................ 50
....................................................................... 39
4
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Contents
6.
RAS Information
......................................................................... 51
6.1
6.2
LED indication .................................................................................. 52
Buffer memory information ................................................................ 53
6.2.1
6.2.2
6.2.3
6.2.4
6.3
Module status
Switch setting status
Error information for data receiving
Error information for data transmitting .......................................... 56
Trouble shooting ............................................................................... 57
.............................................................................. 53
................................................................... 54
.............................................. 55
Appendix
.................................................................................................... 59
A.1
A.2
Specification of the READ instruction ............................................... 60
Specification of the WRITE instruction ............................................ 62
User’s Manual 5
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6
ASCII Interface Module (AS311)
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Section 1
AS311 Overview
1.1 Introduction
1.2 AS311 functions
1.3 External features
User’s Manual 7
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1. AS311 Overview
1.1 Introduction
The ASCII interface module AS311 (hereafter called AS311) is a general purpose data
communication module for Toshiba’s Programmable Controller PROSEC-T3 (hereafter
called T3). By using the AS311, T3 can communicate with external devices, such as a
micro computer, bar code reader, printer, display device, sensor, etc., through the
serial interface RS-232C or RS-422.
The AS311 has two ports of the serial interface. One port (channel 1) can be selected
either RS-232C or RS-422 by switch setting. The other port (channel 2) is RS-232C
interface. These two ports can be used independently for data receiving and
transmitting.
The transmission is asynchronous (start-stop system).
ASCII is used as the transmission data code.
The figure below shows the typical system configuration.
AS311
T3
Channel 1
RS-232C or RS-422
Channel 2
RS-232C
CPU module
The maximum number of AS311 that can be controlled by one T3 is not limited by
software. However, this module consumes maximum 1 A of internal 5 Vdc power.
Confirm that the total 5 Vdc consumed current per one power supply module is
within the limit (7 A).
NOTE
8
ASCII Interface Module (AS311)
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1. AS311 Overview
1.2 AS311 functions
From the point of view of T3, the AS311 works as communications driver. The
followings are the simplified explanations for T3 and AS311 functions.
When a message (one set of transmission characters) is received by AS311, the flag
which indicates the receiving complete will come ON. T3 can check the flag status then
read the message from the AS311 by using the READ instruction.
In case of transmitting a message (one set of transmission characters) from T3 through
AS311, T3 writes the message into the AS311 by using the WRITE instruction, then
sets the flag which instruct the AS311 to start transmitting the message.
T3
AS311
Register
Buffer memory
READ
Receiving
area
Receiving
buffer
Channel 1
Channel 2
WRITE Transmitting
area
READ
Receiving
area
Transmitting
buffer
WRITE Transmitting
area
Receiving
buffer
Transmitting
buffer
Here, a message (one set of transmission characters) means a string of ASCII
characters which is ended by specified trailing code. The default setting of the trailing
code is CR (carriage return code = H0D).
Applicable message format (default trailing code):
1
2
3
4
N-1
N
CR
N: message length = 896 bytes max.
In other words, the AS311 cannot be used for the data communication in which the
transmission message is ended by two or more types of trailing code.
User’s Manual 9
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1. AS311 Overview
1.3 External features
Status LEDs
AS311
•
•
•
•
•
RUN
TX1
RX1
TX2
RX2
SW1
8
7
6
5
4
3
2
1
Channel 1 transmission parameter
setting switches
SW2
8
7
6
5
4
3
2
1
Channel 2 transmission parameter
setting switches
ON→
RS-232C/RS-422 selection switches
Optional rotary switches
SW3
RSW
1
1
2
3
↓
RSW
2
→
ON→
RESET
Hardware reset switch
Channel 1 serial port (RS-232C/RS-422)
D-Sub 25-pin female connector
CH1
Channel 2 serial port (RS-232C)
D-Sub 25-pin female connector
CH2
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1. AS311 Overview
Status LEDs
RUN: Lit when AS311 is operating normally
TX1:
RX1:
TX2:
RX2:
Lit while transmitting data from channel 1
Lit while receiving data to channel 1
Lit while transmitting data from channel 2
Lit while receiving data to channel 2
SW1
channel 1 transmission parameter setting switches
No.8 … No use (set always ON)
8
7
OFF
2 bit
ON
1 bit
No.7
Stop bit
6
5
4
3
2
1
OFF
7 bit
ON
8 bit
No.6
Data bit length
OFF
OFF/ON
None
ON
OFF
Even
ON
ON
Odd
No.5
No.4
Parity
ON→
SW1
OFF OFF OFF OFF
ON
ON
ON
No.3
OFF OFF
ON
OFF
ON
ON
OFF OFF
OFF ON
ON
OFF
No.2
No.1
Baud rate
OFF
300
ON
600
1200 2400 4800 9600 19200
SW2
channel 2 transmission parameter setting switches
Used to set the transmission parameters for channel 2. The functions of each switch
are the same as the SW1. Set the transmission parameters independently for
channel 1 and channel 2.
NOTE
The factory settings of the SW1 and SW2 are as shown above figure.
That is, 1 stop bit, 8 data bits, odd parity and 9600 bps.
User’s Manual 11
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1. AS311 Overview
SW3
RS-232C/RS-422 selection switches (for channel 1)
Used to select the interface of the channel 1 either
RS-232C or RS-422.
1
OFF
ON
No.1
Interface
RS-232C
RS-422
2
3
Used to connect the terminating resistor (120 Ω)
between RXDA and RXDB. (Effective for RS-422)
No.2
ON→
OFF
ON
Terminating
Not connect
Connect
SW3
Used to connect the terminating resistor (120 Ω)
between CTSA and CTSB. (Effective for RS-422)
OFF
ON
No.3
Terminating
Not connect
Connect
The switches No.2 and No.3 should be set to ON when the AS311
is configured as terminal station on the RS-422 transmission line.
The factory settings of the SW3 are all OFF.
NOTE
RSW1/RSW2
Optional rotary switches
C
Always set the RSW1 to 4 and the RSW2 to 0.
RSW1
(Other settings are for future use)
8
0
4
Do not set other than above, otherwise the AS311
will not work correctly.
C
RSW2
8
0
4
12 ASCII Interface Module (AS311)
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1. AS311 Overview
Hardware reset switch
When this switch is pressed, the AS311 will be reset. Use this switch when you
have changed the switch settings.
Channel 1 and channel 2 serial ports
Used to connect the serial transmission line (RS-232C or RS-422). D-Sub 25-pin
female connectors are provided on the AS311.
The pin assignment is as follows.
Channel 1
(RS-232C/RS-422)
Channel 2
(RS-232C)
1
2
3
4
5
6
7
8
9
FG
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
FG
↔
→
←
→
←
↔
→
←
→
←
←
↔
TXD
RXD
RTS
CTS
TXD
RXD
RTS
CTS
DSR
SG
for RS-232C
SG
↔
5 Vdc
5 Vdc
→
→
←
→
←
→
10 TXDA
11 RXDA
12 RTSA
13 CTSA
14
15
16
17
18
for RS-422
19
20 DTR
21 TXDB
22 RXDB
23 RTSB
24 CTSB
25
20 DTR
→
→
←
→
←
for RS232C
for RS-422
→
21
22
23
24
25
• The arrow on the above figure shows the signal direction.
• FG is connected with the T3’s frame ground internally. (both channels)
• DTR and RTS are ON while power is on.
• Data transmitting is available when CTS is ON. DSR has no effect for transmission.
• Pin 9 (5 Vdc) can be used to supply 5 Vdc power. (total max. 50 mA)
User’s Manual 13
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14 ASCII Interface Module (AS311)
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Section 2
Specifications
2.1 General specifications
2.2 Functional specifications
2.3 Transmission specifications
User’s Manual 15
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2. Specifications
2.1 General specifications
Item
Power voltage
Specifications
5 Vdc (supplied from back plane bus)
1.0 A (5 Vdc) maximum
Conforms to T3 specifications
10 MΩ (500 Vdc)
Remarks
Note (1)
Current consumption
Environmental conditions
Insulation resistance
Withstand voltage
Size
Note (2)
Note (2)
500 Vac - 1 minute
T3 I/O module size (1 slot)
500 g
Weight
Note (1) The T3’s power supply module can supply maximum 7 A of internal 5 Vdc.
Check that the internal 5 Vdc current consumption per one power supply
module does not exceed the limit.
Note (2) Between interface connector pins and internal circuit.
2.2 Functional specifications
Item
Module type
I/O allocation type
Specifications
Serial communication interface
iX+Y 4W
Buffer memory capacity
448 words x 4
(accessed from T3 by READ/WRITE instruction)
Transmission interface
Display
2 channels;
Channel 1 … RS-232C or RS-422 (selectable)
Channel 2 … RS-232C
Status LEDs;
RUN … lit when operating normally
TX1 … lit while transmitting data from channel 1
RX1 … lit while receiving data to channel 1
TX2 … lit while transmitting data from channel 2
RX2 … lit while receiving data to channel 2
Computer, bar code reader, display device, sensor,
printer, or other serial ASCII device
Self diagnosis, watch dog timer (200 ms),
transmission error check, etc.
Connectable devices
RAS function
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2. Specifications
2.3 Transmission specifications
Item
Interface
Transmission mode
Synchronizing
Transmission speed
Frame format
Channel 1
RS-232C or RS-422
Full-duplex
Start-stop method (asynchronous)
300, 600, 1200, 2400, 4800, 9600, 19200 bps
Channel 2
RS-232C
Start bit
Data
Parity
1 bit
7 or 8 bits
even / odd / none
1 or 2 bits
Stop bit
Transmission code
Message length
ASCII
Max. 896 bytes
Configuration
Transmission distance
One to one (Note)
Max. 15 m (RS-232C)
Max. 1 km (RS-422)
D-sub 25-pin female
Max. 15 m
Connector
D-sub 25-pin female
Note) In case of RS-422 interface, multiple devices can be connected to one AS311
if the connected RS-422 devices work as slave stations and support multi-point
connection. That is, the connected RS-422 devices must have the transmission
generators which support the passive state. Also, the RS-422 devices must
support the message format which contains the selecting address. In this case,
the number of the connected RS-422 devices is limited up to 10.
On the other hand, the AS311’s transmission generator does not support the
passive state. Therefore the AS311 must be the master station in the one-to-N
configuration.
User’s Manual 17
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18 ASCII Interface Module (AS311)
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Section 3
Cable Connections
3.1 RS-232C connection
3.2 RS-422 connection
User’s Manual 19
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3. Cable Connections
3.1 RS-232C connection
The following figure shows the RS-232C connection.
AS311
Shielded cable
RS-232C device
1 FG
2 TXD
3 RXD
4 RTS
5 CTS
6 (DSR)
7 SG
RXD
TXD
DTR
SG
DSR
RTS
CTS
20 DTR
(1) DSR is supported only on the channel 2.
(2) Connect SG each other.
(3) Use shielded cable. The cable shield should be connected to FG at one end.
(4) It is recommended to use twisted cable for noise immunity.
NOTE
Do not connect or remove the connector while the AS311 is powered. Otherwise, it
will cause damage to the AS311.
20 ASCII Interface Module (AS311)
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3. Cable Connections
3.2 RS-422 connection
The channel 1 can be selected either RS-232C or RS-422. The following figure shows
the RS-422 connection.
AS311
Shielded cable
RS-422 device
1 FG
FG
10 TXDA
21 TXDB
11 RXDA
22 RXDB
7 SG
12 RTSA
23 RTSB
13 CTSA
24 CTSB
RXDA
RXDB
TXDA
TXDB
SG
CTSA
CTSB
RTSA
RTSB
R
R
(1) On the AS311, connect the built-in terminating resistors (120 Ω) between RXDA
and RXDB and between CTSA and CTSB by setting switches.
(Set the SW3-2 and SW3-3 to ON)
(2) On the RS-422 device, connect the terminating resistors R (120 Ω - 1/2 W)
between RXDA and RXDB and between CTSA and CTSB.
(3) Connect SG each other.
(4) Use shielded twisted-pair cable. The A (+) and B (-) of the same signal should be
paired.
(5) The cable shield should be connected to FG at one end.
NOTE
Do not connect or remove the connector while the AS311 is powered. Otherwise, it
will cause damage to the AS311.
User’s Manual 21
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22 ASCII Interface Module (AS311)
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Section 4
Register Configuration
4.1 I/O allocation and I/O registers
4.2 AS311 buffer memory
User’s Manual 23
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4. Register Configuration
4.1 I/O allocation and I/O registers
The AS311 has the I/O type ‘i X+Y 4W’ for I/O allocation. When the automatic I/O
allocation is performed with mounting the AS311, the following I/O allocation table will
be created in the T3.
(T-PDS screen example - in the case that AS311 is mounted on Slot 0 of Unit 0)
Then, 4 I/O registers, XW(n), XW(n+1), YW(n+2) and YW(n+3), are assigned to the
AS311.
In the above example, XW000, XW001, YW002 and YW003 are assigned.
Note that the I/O type has ‘i’ designation. It means that the T3 will not update the
assigned I/O registers in the batch I/O processing. To read or write data through
the I/O registers, the Direct I/O instruction (FUN235) or the direct I/O designation
(I/IW and O/OW instead of X/XW and Y/YW) is necessary.
The reason of that is because the reading and writing timings are important for
handshaking between T3 and AS311. Refer to section 5.
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4. Register Configuration
The following table shows the functions of I/O registers assigned to the AS311.
F
E
D
C
B
A
9
8
7
6
5
4
3
2
1
0
No use
No use
No use
No use
No use
No use
No use
No use
XW(n)
CH1 status
CH2 status
CH1 command
CH2 command
XW(n+1)
YW(n+2)
YW(n+3)
Register Bit
Name
Write ready
Transmit complete 1: transmitting has been completed normally
Description
1: ready to write data (transmit) for channel 1
F
E
D Transmit error
1: transmitting has been canceled by error
No use (always 0)
XW(n)
(CH1)
C - 8
−
7
6
Read ready
1: ready to read the received data
Receive complete 1: receiving for channel 1 has been completed
5
4 - 0
F
Receive error
−
Write ready
1: receiving error has occurred
No use (always 0)
1: ready to write data (transmit) for channel 2
E
Transmit complete 1: transmitting has been completed normally
D Transmit error
1: transmitting has been canceled by error
No use (always 0)
XW(n+1) C - 8
−
(CH2)
7
6
Read ready
1: ready to read the received data
Receive complete 1: receiving for channel 2 has been completed
5
4 - 0
F
Receive error
1: receiving error has occurred
No use (always 0)
Set to 1 to start transmitting data from channel 1
No use (set to 0)
−
Transmit start
YW(n+2) E - 8
−
(CH1)
7
6 - 0
F
Read start
Set to 1 to start reading data for channel 1
No use (set to 0)
Set to 1 to start transmitting data from channel 2
No use (set to 0)
Set to 1 to start reading data for channel 2
No use (set to 0)
−
Transmit start
YW(n+3) E - 8
(CH2)
−
Read start
−
7
6 - 0
NOTE
These bits are used for handshaking between T3 and AS311. The detailed
function and timing are explained in section 5.
User’s Manual 25
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4. Register Configuration
4.2 AS311 buffer memory
As explained in the previous section, the I/O registers that are assigned to AS311
are used to control the reading and writing timings (handshake) between T3 and
AS311.
On the other hand, for exchanging the transmission data between T3 and AS311, the
AS311’s buffer memory is used.
This section explains the buffer memory contents and how to access the buffer
memory.
4.2.1 Memory map
The AS311 has the buffer memory that is used to exchange data with T3. The overall
map of the buffer memory is as follows.
Address
0
Word data
Status and command
4 words - same data as I/O registers
124 words - transmission parameters, etc.
448 words
4
Parameter
128
Channel 1
reading (receiving)
data area
576
1024
1472
1920
Channel 1
writing (transmitting)
data area
448 words
448 words
448 words
128 words
Channel 2
reading (receiving)
data area
Channel 2
writing (transmitting)
data area
Access inhibited
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4. Register Configuration
4.2.2 Buffer memory access
T3 can read the AS311’s buffer memory contents by using READ instruction (FUN237).
Also, T3 can write data into the buffer memory by using WRITE instruction (FUN238).
READ instruction (FUN237)
Expression:
[ (A) READ (B) → (C) ]
Operands:
(A):
(B):
I/O register (XW/YW) assigned to the AS311
Starting address of the buffer memory to be read
(B)+1: Number of words to be read (max. 256)
(C):
Starting register of the destination
Example:
R0100
[ 00128 MOV D5000 ] [ 00064 MOV D5001 ]
[ XW000 READ D5000 → D1000 ]
When R0100 is ON, 64 words of buffer memory data starting with address 128
are read from the AS311 which is allocated to XW000. And the data are stored
in D1000 and after.
User’s Manual 27
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4. Register Configuration
WRITE instruction (FUN238)
Expression:
[ (A) WRITE (B) → (C) ]
Operands:
(A):
(B):
Starting register of the source
Starting address of the buffer memory to be written
(B)+1: Number of words to be written (max. 256)
(C):
I/O register (XW/YW) assigned to the AS311
Example:
R0101
[ 00576 MOV D5000 ] [ 00100 MOV D5001 ]
[ D2000 WRITE D5000 → YW002 ]
When R0101 is ON, 100 words of data starting with D2000 (D2000 to D2099)
are written into the buffer memory address 576 and after of the AS311 which is
allocated to YW002.
28 ASCII Interface Module (AS311)
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4. Register Configuration
4.2.3 Parameter area
The parameter area of the buffer memory contains the following contents.
Address
0 CH1 status
Address
64
1 CH2 status
2 CH1 command
3 CH2 command
4 Status 1
Status and
command
65
66
67
68
5 RSW1/2 information
6 SW1 information
7 SW2 information
8
69
70
71
72
Reserved
CH1, CH2
common
9
73
10
parameters
74
11
75
12 Command 1
76
13
77
14
78
15
79
16 CH1 receive error
80 CH2 receive error
17 CH1 transmit error
81 CH2 transmit error
18 CH1 channel status
82 CH2 channel status
19 CH1 receive length
83 CH2 receive length
20
84
21
85
22
86
23
87
24 CH1 trailing code
88 CH2 trailing code
25 CH1 time-out check CH1
89 CH2 time-out check CH2
26
27
28
29
30
31
parameters
90
91
92
93
94
95
parameters
63
127
Note: Blanks are for future use. (Reserved)
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4. Register Configuration
Status and command (0 - 3)
The addresses 0 to 3 store the same data as the I/O registers that are assigned to the
AS311.
Refer to section 4.1 for details.
0
1
2
3
CH1 status
CH2 status
CH1 command
CH2 command
= XW(n)
= XW(n+1)
= YW(n+2)
= YW(n+3)
Status 1 (4)
The address 4 shows the AS311 module status. If an error has occurred in the AS311,
the error code is stored here.
F
E
D
0
C
0
B
0
A
0
9
0
8
0
7
6
5
4
3
2
1
0
RDY ERR
Error code
4
Bit F
RDY (Ready)
ERR (Error)
Error code
1 = operating normally
0 = under initialization or error state
1 = error state
0 = no error (normal)
Shows the detected error item if ERR is 1.
(H00 when normal)
Bit E
Bit 7-0
See section 6.2.1 for details.
RSW1/2 information (5)
The address 5 stores the rotary switches RSW1 and RSW2 setting status.
F
0
E
0
D
0
C
0
B
0
A
0
9
0
8
0
7
6
5
4
3
2
1
0
RSW1
RSW2
5
Bit 7-4
Bit 3-0
RSW1
RSW2
Stores the rotary switch 1 (RSW1) setting status.
0 - F
Stores the rotary switch 2 (RSW2) setting status.
0 - F
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4. Register Configuration
SW1 information (6)
The address 6 stores the setting status of the channel 1 transmission parameter setting
switches (SW1).
F
0
E
0
D
0
C
0
B
0
A
0
9
0
8
0
7
6
5
4
3
2
1
0
SW1
6
SW1
OFF
ON
8
7
6
5
4
3
2
1
ON: 1 OFF: 0
SW2 information (7)
The address 7 stores the setting status of the channel 2 transmission parameter setting
switches (SW2).
F
0
E
0
D
0
C
0
B
0
A
0
9
0
8
0
7
6
5
4
3
2
1
0
SW2
7
SW2
OFF
ON
8
7
6
5
4
3
2
1
ON: 1 OFF: 0
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4. Register Configuration
Command 1 (12)
The address 12 is used to reset the AS311 by T3 program.
Two types of reset commands are available, hot reset and cold reset.
The hot reset is used to change the trailing code and the time-out check time settings.
The cold reset is used to initialize the AS311. The trailing code and the time-out check
time will be reset to the default setting. The operation of the cold reset is the same as the
hard reset switch and power on initialization.
Refer to sections 5.5, 5.6 and 5.7 for these functions.
F
E
0
D
0
C
0
B
0
A
0
9
0
8
0
7
6
5
4
3
2
1
0
RST
Command number
12
Bit F
Bit 7-0
RST (Reset)
1 = reset request
0 = normal (no reset request)
HFE = hot reset
HFF = cold reset
Command
number
CH1 receive error (16) and
CH2 receive error (80)
The address 16 (for channel 1) and the address 80 (for channel 2) indicate the error
contents if an error has been detected in receiving a message. This information is set
during the received message read sequence.
Refer to section 6.2.3 for details.
F
0
E
0
D
0
C
0
B
A
9
8
7
6
5
4
3
2
1
0
BRK PE
FE
OE
Receive error code
16 or 80
Bit B
Bit A
Bit 9
BRK (Break)
1 = break detected
0 = normal
PE (Parity error) 1 = parity error
0 = normal
FE
1 = framing error
0 = normal
(Framing error)
Bit 8
OE
1 = overrun error
0 = normal
Shows the error code regarding received message.
(H00 when normal)
(Overrun error)
Receive error
code
Bit 7-0
See section 6.2.3 for details.
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4. Register Configuration
CH1 transmit error (17) and
CH2 transmit error (81)
The address 17 (for channel 1) and the address 81 (for channel 2) indicate the error
contents if an error has occurred during message transmitting. This information is set
during the write sequence for message transmitting.
Refer to section 6.2.4 for details.
F
0
E
0
D
0
C
0
B
0
A
0
9
0
8
0
7
6
5
4
3
2
1
0
Transmit error code
17 or 81
Bit 7-0
Transmit error
code
Shows the error code for transmitting.
(H00 when normal)
See section 6.2.4 for details.
CH1 channel status (18) and
CH2 channel status (82)
The address 18 (for channel 1) and the address 82 (for channel 2) indicate the control
signal status. This information is always updated.
F
0
E
0
D
0
C
0
B
0
A
0
9
0
8
7
6
0
5
0
4
0
3
2
1
1
0
0
0
IDL DSR
CTS
18 or 82
Bit 8
IDL (Idle)
DSR
(Data set ready) 0 = DSR is OFF
CTS
1 = transmitter is idle state
0 = transmitter is non-idle state
1 = DSR is ON
Bit 7
Bit 3
Note (1)
1 = CTS is ON
0 = CTS is OFF
(Clear to send)
Note: (1) The channel 1 does not support DSR. Therefore, bit 7 of the address 18 is
always 0.
(2) The bit 2 is always 1.
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4. Register Configuration
CH1 receive length (19) and
CH2 receive length (83)
The address 19 (for channel 1) and the address 83 (for channel 2) indicate the length of
the received message (number of bytes). This information is set during the received
message read sequence.
F
E
D
C
B
A
9
8
7
6
5
4
3
2
1
0
Received message length
19 or 83
Bit F-0
Received
Shows the received message length (bytes).
message length 0 - 896
CH1 trailing code (24) and
CH2 trailing code (88)
The address 24 (for channel 1) and the address 88 (for channel 2) store the trailing
codes. The default setting is H0D (CR code).
To change the trailing code, write the desired code into this address then write the hot
reset command into the Command 1 (12). See section 5.6 for this procedure.
F
0
E
0
D
0
C
0
B
0
A
0
9
0
8
0
7
6
5
4
3
2
1
0
Trailing code
24 or 88
Bit 7-0
Trailing code
Stores the trailing code.
Initial value at power on is H0D (carriage return).
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4. Register Configuration
CH1 time-out check (25) and
CH2 time-out check (89)
The address 25 (for channel 1) and the address 89 (for channel 2) store the time-out
check times. If the time between each receiving character exceeds the specified time-out
check time, it becomes the receiving time-out error. The default setting is 1 second.
To change the setting, write the desired data into this address then write the hot reset
command into the Command 1 (12). See section 5.7 for this procedure.
F
E
D
C
B
A
9
8
7
6
5
4
3
2
1
0
Time-out check time
25 or 89
Bit F-0
Time-out check
time
Stores the time-out check time (0.1 s units).
Valid data range is 1 to 600 (0.1 to 60 s). If 0 or more
than 600 is specified, the time-out check will not work.
Initial value at power on is 10 (1 s).
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4. Register Configuration
4.2.4 Receiving and transmitting data area
The receiving and transmitting data area is provided to exchange the communication
characters between T3 and AS311. The address ranges in the AS311 buffer memory
are as follows.
Address
128
Word data
Channel 1
reading (receiving)
data area
448 words
448 words
448 words
448 words
576
1024
1472
Channel 1
writing (transmitting)
data area
Channel 2
reading (receiving)
data area
Channel 2
writing (transmitting)
data area
When AS311 receives a message (one set of transmission characters), AS311 sets the
characters into the receiving data area starting with the address 128 or 1024. Then T3
can read these characters from the receiving data area by using READ instruction.
When T3 attempts to send a message via AS311, T3 writes the characters into the
transmitting data area starting with the address 576 or 1472 by using WRITE
instruction, and instructs AS311 to start transmitting. AS311 recognizes from the
character stored in the starting address (576 or 1472) to the trailing code character as
the one set of transmitting message.
Refer to section 5 for message receiving/transmitting procedure.
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Section 5
Operation Procedure
5.1 Transmission message format
5.2 Received message read sequence
5.3 Write sequence for message transmitting
5.4 Checking the AS311 operation status
5.5 Resetting the AS311 by software
5.6 Setting the trailing code
5.7 Setting the time-out check time
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5. Operation Procedure
5.1 Transmission message format
The transmission message is composed by ASCII characters and a specified trailing
code. The default setting of the trailing code is CR (carriage return code = H0D).
Refer to section 5.6 for setting the trailing code other than CR.
The maximum length of a message is 896 bytes. An example of the message is
shown below.
1
2
3
4
5
6
7
8
9
CR
″0″ ″1″ ″2″ ″A″
″B″
″7″
″8″
″9″
In the above figure, ″x″ means an ASCII character. For example, ″0″ is H30.
When the above message is received or transmitted, the data arrangements in the
T3 registers are as follows.
Transmission message
Register
n
F
8 7
0
″0″
″1″
″2″
″A″
″B″
″7″
″8″
″9″
CR
″1″
″A″
″7″
″9″
″0″
″2″
″B″
″8″
CR
n+1
n+2
n+3
n+4
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5. Operation Procedure
5.2 Received message read sequence
5.2.1 Flag control timing
In case of receiving a message, the following flags are used for handshaking between
T3 and AS311. These flags are the bits of the I/O registers assigned to the AS311.
Refer to section 4.1.
Read ready
Receive complete
Receive error
Bit 7 of XW(n) for channel 1 or XW(n+1) for channel 2
Bit 6 of XW(n) for channel 1 or XW(n+1) for channel 2
Bit 5 of XW(n) for channel 1 or XW(n+1) for channel 2
Read start
Bit 7 of YW(n+2) for channel 1 or YW(n+3) for channel 2
The message receiving procedure is as follows. It is called “received message read
sequence”.
AS311 receives a message
AS311 sets Receive complete to ON
T3 sets Read start to ON
Normal receiving
Receiving error
AS311 sets the message into buffer
memory (receiving data area), and
sets the received message length into
buffer memory (parameter area)
AS311 sets the error information into
buffer memory (parameter area)
AS311 sets Read ready to ON, and
AS311 sets Receive error to ON, and
resets Receive complete to OFF
resets Receive complete to OFF
T3 reads the message form buffer
memory (receiving data area)
by READ instruction
T3 reads the error information from
buffer memory (parameter area)
by READ instruction
T3 resets Read start to OFF
T3 resets Read start to OFF
AS311 resets Read ready to OFF
AS311 resets Receive error to OFF
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5. Operation Procedure
5.2.2 T3 sample program for message receiving
A sample program for the “received message read sequence” is shown below.
This sample program is for the channel 1 of the AS311 that is allocated to XW000 -
YW003.
(Main program)
Operation for normal received message
Operation for receiving error
(Subroutine No. 0)
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5. Operation Procedure
In this sample program, the following devices/registers are used.
R0100
R0200
R0300
AS311 status (ON when ready) - Refer to section 5.4
Receiving normal complete (comes ON when receiving is complete normally)
Receiving error complete (comes ON when receiving error has occurred)
X0006
X0007
X0005
Y0027
Receive complete flag
Read ready flag
Receive error flag
Read start flag
D0000 - D0063
D3000
D4000 - D4001
Received message is stored here
Receiving error information is stored here
Parameters for READ instruction
This sample program works as follows.
Main program
- Rung 1: Calls Subroutine No. 0 when the AS311 is normal and both R0200 and
R0300 are OFF.
- Rung 2: When R0200 comes ON (normal receiving), performs the necessary
operation for the received message, then resets R0200 to OFF.
- Rung 3: When R0300 comes ON (receiving error has occurred), performs the error
processing, then resets R0300 to OFF.
Subroutine No. 0
- Rung 1: Indicates the entry of Subroutine No. 0.
- Rung 2: Reads XW000 and XW001 from the AS311 by direct I/O instruction.
- Rung 3: Sets Y0027 (Read start flag) to ON if X0006 (Receive complete flag) is ON.
- Rung 4: When X0007 (Read ready flag) comes ON, reads the received message from
the AS311’s buffer memory, 64 words starting with address 128, by READ instruction,
and stores it into D0000 and after. Then resets Y0027 (Read start flag) to OFF, and
sets R0200 to ON.
When X0005 (Receive error flag) comes ON, reads the error information from the
AS311’s buffer memory, 1 word of address 16, by READ instruction, and stores it into
D3000. Then resets Y0027 (Read start flag) to OFF, and sets R0300 to ON.
- Rung 5: Writes YW002 and YW003 into the AS311 by direct I/O instruction.
- Rung 6: Indicates the return of Subroutine No. 0.
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5. Operation Procedure
Explanation for this sample program:
(1) The “received message read sequence” is programmed on Subroutine No. 0.
(2) The Subroutine No. 0 is called from Main program with resetting R0200 and R0300
to OFF.
(3) When a message is received normally, R0200 will come ON and the message
(ASCII characters) will be stored in D0000 to D0063. In this sample program, the
received message length information (buffer memory address 19) is not used. The
maximum length of a message is 128 bytes (64 words) because the number of
read words of the READ instruction is programmed as 64 words.
(4) When an error has occurred in receiving the message, R0300 will come ON and
the error information will be stored in D3000. For details of the error information,
refer to section 6.2.3.
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5. Operation Procedure
5.3 Write sequence for message transmitting
5.3.1 Flag control timing
In case of transmitting a message, the following flags are used for handshaking
between T3 and AS311. These flags are the bits of the I/O registers assigned to the
AS311. Refer to section 4.1.
Write ready
Bit F of XW(n) for channel 1 or XW(n+1) for channel 2
Transmit complete Bit E of XW(n) for channel 1 or XW(n+1) for channel 2
Transmit error
Transmit start
Bit D of XW(n) for channel 1 or XW(n+1) for channel 2
Bit F of YW(n+2) for channel 1 or YW(n+3) for channel 2
The message transmitting procedure is as follows. It is called “write sequence for
message transmitting”.
T3 checks Write ready is ON
T3 writes a message into buffer
memory (transmitting data area)
by WRITE instruction
T3 sets Transmit start to ON
AS311 resets Write ready to OFF
Normal transmitting
Transmitting error
AS311 sends out the message and
sets Transmit complete to ON
AS311 sets the error information into
buffer memory (parameter area) and
sets Transmit error to ON
T3 resets Transmit start to OFF
T3 reads the error information from
buffer memory (parameter area)
by READ instruction, and resets
Transmit start to OFF
AS311 resets Transmit complete to
OFF, and sets Write ready to ON
AS311 resets Transmit error to OFF,
and sets Write ready to ON
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5. Operation Procedure
5.3.2 T3 sample program for message transmitting
A sample program for the “write sequence for message transmitting” is shown below.
This sample program is for the channel 1 of the AS311 that is allocated to XW000 -
YW003.
(Main program)
Set the transmission message into
D0200 - D0263, and set R0110 to ON
Operation for transmitting error
(Subroutine No. 1)
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5. Operation Procedure
In this sample program, the following devices/registers are used.
R0100
R0110
R0201
AS311 status (ON when ready) - Refer to section 5.4
Internal flag to start transmitting
Transmitting normal complete (comes ON when transmitting is complete
normally)
R0301
Transmitting error complete (comes ON when transmitting error has
occurred)
X000F
Write ready flag
X000E Transmit complete flag
X000D Transmit error flag
Y002F
Transmit start flag
D0200 - D0263
D3010
D4010 - D4011
D4000 - D4001
Transmitting message is set here
Transmitting error information is stored here
Parameters for WRITE instruction
Parameters for READ instruction
This sample program works as follows.
Main program
- Rung 1: Prepares a transmission message and sets it into D0200 and after (maximum
64 words in this sample). Then sets R0110 to ON.
- Rung 2: Calls Subroutine No. 1 when the AS311 is normal and R0110 is ON.
- Rung 3: When R0201 comes ON (normal transmitting), resets R0110 and R0201 to
OFF.
- Rung 4: When R0301 comes ON (transmitting error has occurred), performs the error
processing, then resets R0110 and R0301 to OFF.
Subroutine No. 1
- Rung 1: Indicates the entry of Subroutine No. 1.
- Rung 2: Reads XW000 and XW001 from the AS311 by direct I/O instruction.
- Rung 3: When X000F (Write ready flag) is ON, writes the message that is stored in
D0200 to D0263 into the AS311’s buffer memory, 64 words starting with address 576,
by WRITE instruction, and sets Y002F (Transmit start flag) to ON.
- Rung 4: When X000E (Transmit complete flag) comes ON, resets Y002F (Transmit
start flag) to OFF, and sets R0201 to ON.
When X000D (Transmit error flag) comes ON, reads the error information from the
AS311’s buffer memory, 1 word of address 17, by READ instruction, and stores it into
D3010. Then resets Y002F (Transmit start flag) to OFF, and sets R0301 to ON.
- Rung 5: Writes YW002 and YW003 into the AS311 by direct I/O instruction.
- Rung 6: Indicates the return of Subroutine No. 1.
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5. Operation Procedure
Explanation for this sample program:
(1) The “write sequence for message transmitting” is programmed on Subroutine
No. 1.
(2) To start transmitting, set the message (ASCII characters) into D0200 and after.
Then set R0110 to ON.
The message length is maximum 128 bytes (64 words) in this sample program.
(3) When R0110 is set to ON while the AS311 is ready, the Subroutine No. 1 will be
called and the message transmitting will be started.
(4) When the message is transmitted normally, R0201 will come ON. Then R0110 will
be reset to OFF.
(5) When an error has occurred in transmitting the message, R0301 will come ON and
the error information will be stored in D3010. For details of the error information,
refer to section 6.2.4.
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5. Operation Procedure
5.4 Checking the AS311 operation status
AS311 operation status information is stored in the AS311’s buffer memory address 4
(Status 1). T3 can read this information by using READ instruction.
A sample program is shown below. This sample program is for the AS311 that is
allocated to XW000 - YW003.
The above sample program works as follows.
- Rung 1: Resets S0051 (Instruction error flag) to OFF, and sets parameters for the
READ instruction.
- Rung 2: Reads the operation status information from the AS311’s buffer memory
address 4 (Status 1).
- Rung 3: When S0051 (Instruction error flag) is OFF and R050F (Ready) is ON, turns
R0100 to ON.
It means that the AS311 is operating normally when R0100 is ON.
If R050E (Error) is ON, the AS311 is in error state. In that case, the error code is
stored in the lower 8 bits of RW050. For the error code, refer to section 6.2.1.
If S0051 (Instruction error flag) is ON, it means that an error has occurred during the
READ instruction execution.
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5. Operation Procedure
5.5 Resetting the AS311 by software
AS311 can be reset by T3 program. Two types of resetting are available, cold reset
and hot reset.
The cold reset is used to reset the AS311 error state. When the cold reset is executed,
the AS311 will be initialized. The trailing code and the time-out check time are also
reset to the default settings. This function is the same as pressing the hardware reset
switch and power on initialization.
On the other hand, the hot reset is used to change the trailing code and/or the time-out
check time.
For executing these functions, write the following data into the AS311’s buffer memory
address 12 (Command 1). The data writing into this address must be one-shot.
Clod reset: H80FF
Hot reset: H80FE
The written data will be cleared to 0 by AS311 when the operation is completed.
A sample program for the cold reset is shown below. This sample program is for the
AS311 that is allocated to XW000 - YW003.
In this sample program, the cold reset operation will be started by setting R0120 to ON.
(Main program)
(Subroutine No. 2)
(H80FF)
For the hot reset, refer to sections 5.6 and 5.7.
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5. Operation Procedure
5.6 Setting the trailing code
The default setting of the trailing code is CR (carriage return code = H0D). The trailing
code can be changed by T3 program.
To do this, write desired trailing code into the AS311’s buffer memory address 24 (CH1
trailing code) and/or address 88 (CH2 trailing code), and execute the hot reset (refer to
section 5.5).
A sample program is shown below. This sample program is for the AS311 that is
allocated to XW000 - YW003.
In this sample program, the trailing code changing routine will be executed once when
the AS311 status is changed to ready (R0100 comes ON - refer to section 5.4), and the
channel 1 trailing code will be changed to H03.
If the channel 2 trailing code and/or the time-out check time are also changed, write
these data on the Main program Rung 2 before calling Subroutine No. 3 in the same
manner.
(Main program)
(H0003)
(Subroutine No. 3)
(H80FE)
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5. Operation Procedure
5.7 Setting the time-out check time
The default setting of the time-out check time is 1 second. The time-out check time
can be changed by T3 program. The valid setting range is 0.1 to 60.0 seconds in 0.1
second units. Refer to section 4.2.3.
To change the time-out check time, write desired value into the AS311’s buffer memory
address 25 (CH1 time-out check) and/or address 89 (CH2 time-out check), and
execute the hot reset (refer to section 5.5).
T3 program for this purpose is almost same as that for setting the trailing code (refer to
section 5.6). Only the difference is writing the time-out check time instead of the trailing
code. See Rung 2 of the following sample. In this sample, the channel 1 time-out check
time is changed to 5 seconds.
If the channel 2 time-out check time and/or the trailing code are also changed, write
these data on the Main program Rung 2 before calling Subroutine No. 3 in the same
manner.
(Main program)
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Section 6
RAS Information
6.1 LED indication
6.2 Buffer memory information
6.3 Trouble shooting
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6. RAS Information
6.1 LED indication
On the AS311, five status LEDs are provided as follows. These LEDs are useful to
check the AS311 operation status and the communication status.
RUN
TX1
RX1
TX2
RX2
RUN
Indicates the AS311 operation status.
Lit when the AS311 is in ready state.
Not lit when the AS311 is in error or under initialization.
Indicates the channel 1 communication status.
Lit while some data is transmitting from the AS311.
Indicates the channel 1 communication status.
Lit while some data is receiving into the AS311.
Indicates the channel 2 communication status.
Lit while some data is transmitting from the AS311.
Indicates the channel 2 communication status.
Lit while some data is receiving into the AS311.
TX1
RX1
TX2
RX2
52 ASCII Interface Module (AS311)
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6. RAS Information
6.2 Buffer memory information
Various RAS information are stored in the AS311’s buffer memory. These information
can be read by READ instruction. When some abnormality has occurred, check these
information.
6.2.1 Module status
Address 4 of the buffer memory stores the AS311 module status.
F
E
D
0
C
0
B
0
A
0
9
0
8
0
7
6
5
4
3
2
1
0
RDY ERR
Error code
4
Bit F
RDY (Ready)
ERR (Error)
Error code
1 = operating normally
0 = under initialization or error state
1 = error state
0 = no error (normal)
Shows the detected error item if ERR is 1.
See the table below (H00 when normal)
Bit E
Bit 7-0
Error
code
H01
Type of error
CPU error
Description
Status
CPU error has been detected
during initialization.
ROM error has been detected
during initialization.
Work RAM error has been
detected during initialization.
Operation is stopped.
Operation is stopped.
Operation is stopped.
Operation is stopped.
Operation is stopped.
H02
H03
H04
H05
ROM error
RAM error
Buffer memory Buffer memory error has been
error
Switch setting
abnormal
detected during initialization.
Switch setting abnormality has
been detected during
initialization.
H10
H11
H12
Watchdog
timer error
Watchdog timer error has
occurred during operation.
Operation is stopped.
Cold reset will be
effective.
Operation is stopped.
Cold reset will be
effective.
Operation is stopped.
Cold reset will be
effective.
Trap interrupt
error
Trap interrupt has occurred by
detecting illegal instruction
during operation.
Buffer memory Buffer memory time-out has
time-out error occurred during operation.
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6. RAS Information
6.2.2 Switch setting status
Addresses 5, 6 and 7 of the buffer memory store the switches setting status. Check
that the information agrees with the physical setting status if some abnormality has
occurred.
F
0
E
0
D
0
C
0
B
0
A
0
9
0
8
0
7
6
5
4
3
2
1
0
RSW1
RSW2
5
Bit 7-4
Bit 3-0
RSW1
RSW2
Stores the rotary switch 1 (RSW1) setting status.
0 - F
Stores the rotary switch 2 (RSW2) setting status.
0 - F
F
0
E
0
D
0
C
0
B
0
A
0
9
0
8
0
7
6
5
4
3
2
1
0
SW1
6
SW1
OFF
ON
8
7
6
5
4
3
2
1
ON: 1 OFF: 0
F
0
E
0
D
0
C
0
B
0
A
0
9
0
8
0
7
6
5
4
3
2
1
0
SW2
7
SW2
OFF
ON
8
7
6
5
4
3
2
1
ON: 1 OFF: 0
54 ASCII Interface Module (AS311)
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6. RAS Information
6.2.3 Error information for data receiving
Address 16 for channel 1 and address 80 for channel 2 store the error information for
data receiving.
F
0
E
0
D
0
C
0
B
A
9
8
7
6
5
4
3
2
1
0
BRK PE
FE
OE
Receive error code
16 or 80
Bit B
Bit A
Bit 9
BRK (Break)
1 = break detected
0 = normal
When break has been detected, receive buffer is
cleared. The next message can be received.
PE (Parity error) 1 = parity error
0 = normal
When parity error has occurred, the message is
disabled. The next message can be received.
1 = framing error
FE
(Framing error)
0 = normal
When framing error has occurred, the message is
disabled. The next message can be received.
1 = overrun error
Bit 8
OE
(Overrun error)
0 = normal
When overrun error has occurred, the message is
disabled. The next message can be received.
Shows the error code regarding received message.
See the table below. (H00 when normal)
Bit 7-0
Receive error
code
Error
code
H01
Type of error
Description
Status
Receive time-
out error
Specified time-out check
time has elapsed between will be received as the next.
characters.
The rest of the message
H02
H03
Message
length error
The message length has
exceeded the limit. (896
bytes)
The message is disabled.
The next message can be
received.
The message is disabled.
The next message can be
received.
Receive buffer Receive buffer overflow
overflow has occurred.
User’s Manual 55
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6. RAS Information
6.2.4 Error information for data transmitting
Address 17 for channel 1 and address 81 for channel 2 store the error information for
data transmitting.
F
0
E
0
D
0
C
0
B
0
A
0
9
0
8
0
7
6
5
4
3
2
1
0
Transmit error code
17 or 81
Bit 7-0
Transmit error
code
Shows the error code for transmitting.
See the table below. (H00 when normal)
Error
code
H01
Type of error
Description
Status
Trailing code
missing
The trailing code has not
been written into the
buffer memory.
The message is disabled.
The next message can be
transmitted.
56 ASCII Interface Module (AS311)
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6. RAS Information
6.3 Trouble shooting
When AS311 does not work properly, check the following points.
When AS311’s RUN
LED does not light;
Does the POWER LED on
the T3 power supply module
light ?
If no, check the power
voltage/connection.
If no, check the internal
5 Vdc current
consumption.
Is the AS311 mounted
securely on the base ?
Remove the AS311,
and mount again
securely.
When RX1/RX2 LED
does not light while
the connected device is
transmitting a message;
Are the transmission
signals (RXD, SG, etc.)
connected properly ?
Check the cable
connection.
When the received data
cannot be read properly;
Does the receive error
occur ?
Check the transmission
parameters (baudrate,
parity, etc.).
Check the cable
connection.
Confirm the receive
error information.
Is the T3 program working
correctly ?
Check the T3 program.
When a data cannot be
transmitted from the
AS311 (TX1/TX2 LED
does not light);
Does the transmit error
occur ?
Confirm the transmit
error information.
Check the T3 program.
Is the CTS signal
connected properly ?
Check the cable
connection.
If CTS signal is OFF,
data transmitting
is prohibited.
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58 ASCII Interface Module (AS311)
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Appendix
A.1 Specification of the READ instruction
A.2 Specification of the WRITE instruction
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Appendix
A.1 Specification of the READ instruction
FUN 237 Special module data read (READ)
Reads designated range of data from the special module.
Input
Execution output
[ A READ B → C ]
Function
• This instruction reads data from the buffer memory of the special module that is
designated by operand A, and stores them in T3’s registers starting with operand C.
• The transfer source address (buffer memory
Input
Action
Output ERF
OFF
ON
address) is designated by operand B.
• The transfer size (number of words) is
designated by operand B+1.
OFF No execution
ON Normal execution
Error (see Note 2)
ON
ON
Index
Operand
Constant
Device
Register
X
Y
S
L
R
Z
T. C.
I
O XW YW SW LW RW W
T
C
D
F
IW
O
I
J
K
Opr
A
Name
Special
module
Transfer
parameter
W
√ √
√ √
√
B
√ √ √ √ √ √ √ √ √ √
√ √ √ √ √ √ √ √ √
C Top register
of destination
Program example
R0000
[ XW000 READ RW010 → D0100 ]
• When R0000 is ON, the buffer memory data of the size indicated by RW011, starting with the
address indicated by RW010 of the special module allocated to XW000, are read and stored in
D0100 and after.
• The maximum number of words to be read is 256 words.
XW000 special module
T3
RW010
RW011
20
16
Buffer memory
20 1234
READ
D0100 1234
D0115 5678
35 5678
16 words
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Appendix
Note 1) The special module can be designated not only by the assigned register, but
also by the mounting position. The mounting position is designated by a
constant data for the operand A as follows.
(Unit number) × 256 + (Slot number)
H
Slot number (hexadecimal)
Unit number (hexadecimal)
Unit number
Hexadecimal
H00
Slot number
Hexadecimal
H00
0
1
2
3
0
1
2
H01
H02
H03
H01
H02
H03
3
4
H04
5
H05
6
H06
7
H07
8
H08
9
H09
10
H0A
For example, if a special module is mounted on Slot-4, Unit-0 (basic unit)
and allocated to XW008 - YW011, the following two READ instructions
function the same.
[ XW008 READ RW010 → D0100 ]
[ H0004 READ RW010 → D0100 ]
Note 2) The READ instruction is not executed as error in the following cases. In
these cases, ERF (instruction error flag = S0051) is set to ON.
• When the operand A is other than a valid constant (see Note 1) or XW/YW
register.
• When the designated special module has been disconnected.
• When no answer error occurs with the designated special module.
• When the number of words transferred exceeds 256 words.
• When the source table of transfer is out of the valid range.
• When the destination table of transfer is out of the valid range.
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Appendix
A.2 Specification of the WRITE instruction
FUN 238 Special module data write (WRITE)
Writes designated range of data into the special module.
Input
Execution output
[ A WRITE B → C ]
Function
• This instruction transfers data stored in T3’s registers starting with operand A into the buffer
memory of the special module that is designated by operand C.
• The destination address (buffer memory
Input
Action
Output ERF
OFF
ON
address) is designated by operand B.
• The transfer size (number of words) is
designated by operand B+1.
OFF No execution
ON Normal execution
Error (see Note 2)
ON
ON
Index
Operand
Constant
Device
Register
X
Y
S
L
R
Z
T. C.
I
O XW YW SW LW RW W
T
C
D
F
IW
O
I
J
K
Opr
A
Name
W
Top register
of source
Transfer
√ √ √ √ √ √ √ √ √ √
√ √ √ √ √ √ √ √ √ √
√ √
√
B
parameter
C Special
module
√ √
Program example
R0000
[ D0100 WRITE RW010 → YW002 ]
• When R0000 is ON, the register data of the size indicated by RW011, starting with D0100,
are transferred to the buffer memory starting with the address indicated by RW010 of the
special module allocated to YW002.
• The maximum number of words to be transferred is 256 words.
T3
YW002 special module
RW010 320
RW011 150
Buffer memory
320 1234
D0100 1234
D0249 5678
WRITE
150 words
469 5678
62 ASCII Interface Module (AS311)
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Appendix
Note 1) The special module can be designated not only by the assigned register, but
also by the mounting position. The mounting position is designated by a
constant data for the operand C as follows.
(Unit number) × 256 + (Slot number)
H
Slot number (hexadecimal)
Unit number (hexadecimal)
Unit number
Hexadecimal
H00
Slot number
Hexadecimal
H00
0
1
2
3
0
1
2
H01
H02
H03
H01
H02
H03
3
4
H04
5
H05
6
H06
7
H07
8
H08
9
H09
10
H0A
For example, if a special module is mounted on Slot-2, Unit-1 (expansion
unit #1) and allocated to XW020 - YW023, the following two WRITE
instructions function the same.
[ D0100 WRITE RW010 → XW020 ]
[ D0100 WRITE RW010 → H0102 ]
Note 2) The WRITE instruction is not executed as error in the following cases. In
these cases, ERF (instruction error flag = S0051) is set to ON.
• When the operand C is other than a valid constant (see Note 1) or XW/YW
register.
• When the designated special module has been disconnected.
• When no answer error occurs with the designated special module.
• When the number of words transferred exceeds 256 words.
• When the source table of transfer is out of the valid range.
• When the destination table of transfer is out of the valid range.
User’s Manual 63
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TOSHIBA CORPORATION
Industrial Equipment Department
1-1, Shibaura 1-chome, Minato-ku
Tokyo 105-8001, JAPAN
Tel: 03-3457-4900 Fax: 03-5444-9268
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