Toshiba AS311 User manual

UM-TS03***-E020
PROGRAMMABLE CONTROLLER
PROSEC T3
ASCII INTERFACE MODULE
AS311
USER’S MANUAL
TOSHIBA CORPORATION

Important Information
Misuse of this equipment can result in property damage or human injury.
Because controlled system applications vary widely, you should satisfy yourself
as to the acceptability of this equipment for your intended purpose.
In no event will Toshiba Corporation be responsible or liable for either indirect
or consequential damage or injury that may result from the use of this equipment.
No patent liability is assumed by Toshiba Corporation with respect to use of
information, illustrations, circuits, equipment or examples of application in this
publication.
Toshiba Corporation reserves the right to make changes and improvements to this
publication and/or related products at any time without notice. No obligation shall be
incurred other than as noted in this publication.
This publication is copyrighted and contains proprietary material. No part of this book
may be reproduced, stored in a retrieval system, or transmitted, in any form or by any
means electrical, mechanical, photocopying, recording, or otherwise without
obtaining prior written permission from Toshiba Corporation.
Copyright © 1995 by Toshiba Corporation
Tokyo, Japan
All rights reserved
Publication number: UM-TS03***-E020
1st edition May 1995

User’s Manual
1
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.
Refers to helpful suggestions on how to operate effectively.
Refers to information considered essential for full understanding of operation.
And refers to conditions that could damage the equipment or render it
temporarily inoperative.
HINT
NOTE

2ASCII Interface Module (AS311)
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.

User’s Manual
3
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: American Standard Code for Information Interchange
•EIA: Electronic Industries Association
•I/O: Input/Output
•LED: Light Emitting Diode
•RS-232C: An EIA standard for data transmission
•RS-422: An EIA standard for data transmission

4ASCII Interface Module (AS311)
Contents
Contents
Safety Precautions .................................................................................. 1
About This Manual .................................................................................. 2
1. AS311 Overview .......................................................................... 7
1.1 Introduction ...................................................................................... 8
1.2 AS311 functions ............................................................................... 9
1.3 External features .............................................................................. 10
2. Specifications ............................................................................ 15
2.1 General specifications ...................................................................... 16
2.2 Functional specifications ................................................................ 16
2.3 Transmission specifications ............................................................. 17
3. Cable Connections ..................................................................... 19
3.1 RS-232C connection ......................................................................... 20
3.2 RS-422 connection ............................................................................ 21
4. Register Configuration .............................................................. 23
4.1 I/O allocation and I/O registers ........................................................ 24
4.2 AS311 buffer memory ........................................................................ 26
4.2.1 Memory map ............................................................................... 26
4.2.2 Buffer memory access ................................................................ 27
4.2.3 Parameter area ............................................................................ 29
4.2.4 Receiving and transmitting data area .......................................... 36
5. Operation Procedure ................................................................. 37
5.1 Transmission message format .......................................................... 38
5.2 Received message read sequence .................................................. 39
5.2.1 Flag control timing ....................................................................... 39
5.2.2 T3 sample program for message receiving ................................... 40
5.3 Write sequence for message transmitting ....................................... 43
5.3.1 Flag control timing ....................................................................... 43
5.3.2 T3 sample program for message transmitting ................................ 44
5.4 Checking the AS311 operation status .............................................. 47
5.5 Resetting the AS311 by software ...................................................... 48
5.6 Setting the trailing code .................................................................... 49
5.7 Setting the time-out check time ........................................................ 50

User’s Manual
5
Contents
6. RAS Information ......................................................................... 51
6.1 LED indication .................................................................................. 52
6.2 Buffer memory information ................................................................ 53
6.2.1 Module status .............................................................................. 53
6.2.2 Switch setting status ................................................................... 54
6.2.3 Error information for data receiving .............................................. 55
6.2.4 Error information for data transmitting .......................................... 56
6.3 Trouble shooting ............................................................................... 57
Appendix .................................................................................................... 59
A.1 Specification of the READ instruction ............................................... 60
A.2 Specification of the WRITE instruction ............................................ 62

6ASCII Interface Module (AS311)

User’s Manual
7
Section 1
AS311 Overview
1.1 Introduction
1.2 AS311 functions
1.3 External features

8ASCII Interface Module (AS311)
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.
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).
CPU module
T3
Channel 2
RS-232C
Channel 1
RS-232C or RS-422
AS311
NOTE

User’s Manual
9
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 Channel 1
WRITE Transmitting buffer
area
READ Receiving Transmitting
area buffer
WRITE Transmitting
area Receiving Channel 2
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.

10 ASCII Interface Module (AS311)
1. AS311 Overview
1.3 External features
Status LEDs
AS311
•RUN
•TX1
•RX1
•TX2
•RX2
8
7
6
5
4
3
2
1
SW3
SW2
SW1
ON→
ON→
1
2
3→
↓
RSW
2
RSW
1
8
7
6
5
4
3
2
1
RESET
CH2
CH1
Channel 1 transmission parameter
setting switches
Channel 2 transmission parameter
setting switches
RS-232C/RS-422 selection switches
Optional rotary switches
Hardware reset switch
Channel 1 serial port (RS-232C/RS-422)
D-Sub 25-pin female connector
Channel 2 serial port (RS-232C)
D-Sub 25-pin female connector

User’s Manual
11
1. AS311 Overview
Status LEDs
RUN: Lit when AS311 is 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
SW1 

channel 1 transmission parameter setting switches
No.3 OFF OFF OFF OFF ON ON ON
No.2 OFF OFF ON ON OFF OFF ON
No.1 OFF ON OFF ON OFF ON OFF
Baud rate 300 600 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.
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.
8
7
6
5
4
3
2
1
SW1
ON→
No.8 …No use (set always ON)
No.7 OFF ON
Stop bit 2 bit 1 bit
No.6 OFF ON
Data bit length 7 bit 8 bit
No.5 OFF ON ON
No.4 OFF/ON OFF ON
Parity None Even Odd
NOTE

12 ASCII Interface Module (AS311)
1. AS311 Overview
SW3 

RS-232C/RS-422 selection switches (for channel 1)
RSW1/RSW2 

Optional rotary switches
SW3
ON→
3
2
1Used to select the interface of the channel 1 either
RS-232C or RS-422.
No.1 OFF ON
Interface RS-232C RS-422
Used to connect the terminating resistor (120 Ω)
between RXDA and RXDB. (Effective for RS-422)
No.2 OFF ON
Terminating Not connect Connect
Used to connect the terminating resistor (120 Ω)
between CTSA and CTSB. (Effective for RS-422)
No.3 OFF ON
Terminating Not connect Connect
NOTE
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.
RSW2
RSW1 C
4
80
C
4
80
Always set the RSW1 to 4 and the RSW2 to 0.
(Other settings are for future use)
Do not set other than above, otherwise the AS311
will not work correctly.

User’s Manual
13
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 Channel 2
(RS-232C/RS-422) (RS-232C)
1 FG ↔1 FG ↔
2 TXD →2 TXD →
3 RXD ←for RS-232C 3 RXD ←
4 RTS →4 RTS →
5 CTS ←5 CTS ←
6 6 DSR ←
7 SG ↔7 SG ↔
8 8
9 5 Vdc →9 5 Vdc →
10 TXDA
→10
11 RXDA
←for RS-422 11
12 RTSA
→12
13 CTSA
←13
14 14
15 15
16 16
17 17
18 18
19 19
20 DTR
→for RS232C 20 DTR →
21 TXDB
→21
22 RXDB
←for RS-422 22
23 RTSB
→23
24 CTSB
←24
25 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)

14 ASCII Interface Module (AS311)

User’s Manual
15
Section 2
Specifications
2.1 General specifications
2.2 Functional specifications
2.3 Transmission specifications

16 ASCII Interface Module (AS311)
2. Specifications
2.1 General specifications
Item Specifications Remarks
Power voltage 5 Vdc (supplied from back plane bus)
Current consumption 1.0 A (5 Vdc) maximum Note (1)
Environmental conditions Conforms to T3 specifications
Insulation resistance 10 MΩ(500 Vdc) Note (2)
Withstand voltage 500 Vac - 1 minute Note (2)
Size T3 I/O module size (1 slot)
Weight 500 g
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 Specifications
Module type Serial communication interface
I/O allocation type iX+Y 4W
Buffer memory capacity 448 words x 4
(accessed from T3 by READ/WRITE instruction)
Transmission interface 2 channels;
Channel 1 …RS-232C or RS-422 (selectable)
Channel 2 …RS-232C
Display 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
Connectable devices Computer, bar code reader, display device, sensor,
printer, or other serial ASCII device
RAS function Self diagnosis, watch dog timer (200 ms),
transmission error check, etc.

User’s Manual
17
2. Specifications
2.3 Transmission specifications
Item Channel 1 Channel 2
Interface RS-232C or RS-422 RS-232C
Transmission mode Full-duplex
Synchronizing Start-stop method (asynchronous)
Transmission speed 300, 600, 1200, 2400, 4800, 9600, 19200 bps
Frame format Start bit
Data
Parity
Stop bit
1 bit
7 or 8 bits
even / odd / none
1 or 2 bits
Transmission code ASCII
Message length Max. 896 bytes
Configuration One to one (Note)
Transmission distance Max. 15 m (RS-232C)
Max. 1 km (RS-422) Max. 15 m
Connector D-sub 25-pin female 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.

18 ASCII Interface Module (AS311)