UG-TS02 -E022
PROGRAMMABLE CONTROLLERS
PROSEC T2-Series
USERS MANUAL
− Modbus Module −
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.
© TOSHIBA Corporation 1998. All rights reserved
PROSEC and TOSLINE are registered trademarks of TOSHIBA Corporation.
Publication number: UG-TSxx -Exxx 1st edition August 1992
2nd edition March 1999
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Safety Precautions
This application guide is prepared for users of Toshiba programmable controller PROSEC T2-Series and EX100 Series (hereafter called T2).
Read this guide and your PLC's manual thoroughly to use the PLC system safely.
Hazard Classifications
In this guide, the following two hazard classifications are used to explain the safety precautions.
!WARNING
!CAUTION
Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. It may also be used to alert against unsafe practices.
Even if a precaution is classified as CAUTION, it may cause serious results depending on the situation. Observe all the safety precautions described on this guide.
Safety Precautions
!CAUTION
•Read the Safety Precautions described in your PLC's User's Manual before using the PLC.
•Carefully design a fail-safe system in order to avoid an unsafe situation caused by PLC failure. When the PLC detects an error in its self-diagnostics, the PLC goes into the error mode. In the error mode, all the PLC outputs turn OFF and the analog outputs go to 0 (zero).
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About This Guide
This guide describes how to setup and use the Toshiba EX10-MML11 Modbus module. When used in a Modbus network, the EX10-MML11 module allows any Modbus master to write to/read from the registers in an EX100 or T2 PLC using standard Modbus RTU protocol.
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Contents |
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Important Information................................................................................................................ |
ii |
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Safety Precautions................................................................................................................... |
iii |
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About This Guide ..................................................................................................................... |
iv |
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Contents ................................................................................................................................... |
v |
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1. |
Overview.............................................................................................................................. |
1 |
2. |
System Configuration........................................................................................................... |
2 |
3. |
External Features and Switch Settings ................................................................................ |
4 |
4. |
Specifications....................................................................................................................... |
5 |
5. |
Modbus Module Operation.................................................................................................... |
6 |
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5.1. Modbus Commands ...................................................................................................... |
6 |
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5.2. Modbus Data Types and T2 Register Mapping ............................................................. |
7 |
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5.3. Restricted Registers ...................................................................................................... |
8 |
6. |
Modbus Module Setup.......................................................................................................... |
9 |
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6.1. Modbus Module DIP Switch Settings ............................................................................ |
9 |
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6.2. Wiring Connection to the Modbus Module................................................................... |
14 |
7. |
CPU Setup for the Modbus Module ................................................................................... |
15 |
8. |
Trouble Shooting ............................................................................................................... |
16 |
9. |
Additional References........................................................................................................ |
17 |
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1. Overview
The Modbus module (ML11) is used to connect T2E, T2N, or EX100 PLCs to a Modbus Master. The addition of the EX10-MML11 (MODBUS Module) allows the T2E, T2N or EX100
PLC to communicate via standard MODBUS RTU protocol. This allows quick and easy access to the PLC registers by a standard MODBUS Master.
Using the ML11 Modbus module any Modbus Master can read the status of registers in the
PLC and write to registers in the PLC. This allows the Modbus Master to know the status of inputs to the PLC (both digital and analog) and to control the outputs of the PLC (also both digital and analog).
The ML11 Modbus module cannot be a Modbus master, only a modbus slave. It has one
RS485 port for connection to the Modbus master. The preferred location of the EX10-MML11 is next to the CPU. However, the module may be located in any slot to the right of the CPU.
The CPU module can be any of the following:
EX10-MPU11 |
EX100 CPU, now obsolete |
EX10-MPU12A |
EX100 CPU, now obsolete |
TPU215—S |
T2 CPU now obsolete |
TPU224--S |
T2 CPU, now obsolete |
TPU234E-S |
T2E CPU (replaces all obsolete CPUs) |
TPU215N-S |
T2N CPU, basic |
TPU235N-S |
T2N CPU, with Ethernet |
TPU245N-S |
T2N CPU, with Ethernet and Tosline S20 |
The ML11 Modbus module is also used to connect a T2 or EX100 PLC into the Toshiba
ECBUS. The ECBUS allows the PLCs to share data with Toshiba’s EC300 series loop controllers. The ECBUS is a LAN (local area network) which allows multiple EC300s and
T2/EX100 PLCs to share data. For more information on the ECBUS, please refer to ECBUS Transmission Interface Manual, see Additional References.
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2. System Configuration
From 1 to 32 T2E or T2N PLCs can be connected to a Modbus master using the Modbus module.
1 to 1 Configuration
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Modbus Master |
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1. |
Higher Level PLC |
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2. |
Distributed Control System |
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3. |
Computer with SCADA or |
RS485 |
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HMI Program |
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T2E PLC
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I/O Modules |
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Modbus Module |
T2 Minimum |
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T2E CPU |
Configuration |
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Power Supply |
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