Toshiba PROSEC T2 Series Bedienungsanleitung

UG-TS02∗∗∗-E022

PROGRAMMABLE CONTROLLERS

PROSEC T2-Series

USERS MANUAL

−Modbus Module −

TOSHIBA CORPORATION

Page ii

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.

PROSEC and TOSLINE are registered trademarks of TOSHIBA Corporation.

Publication number: UG-TSxx∗∗∗-Exxx

1st edition August 1992

2nd edition March 1999

Page iii

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.

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

!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.

•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).

Page iv

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.

Page v

Contents

Important Information................................................................................................................ii

Safety Precautions................................................................................................................... iii

About This Guide.....................................................................................................................iv

Contents ...................................................................................................................................v

1. Overview..............................................................................................................................1

2. System Configuration...........................................................................................................2

3. External Features and Switch Settings................................................................................4

4. Specifications.......................................................................................................................5

5. Modbus Module Operation....................................................................................................6

5.1. Modbus Commands......................................................................................................6

5.2. Modbus Data Types and T2 Register Mapping.............................................................7

5.3. Restricted Registers......................................................................................................8

6. Modbus Module Setup..........................................................................................................9

6.1. Modbus Module DIP Switch Settings ............................................................................9

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

Page 1

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.

Page 2

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

T2 Minimum

Configuration

T2E PLC

RS485

Power Su

T2E CPU

Modbus Module

I/O Modules

Modbus Master

1. Higher Level PLC

2. Distributed Control System

3. Computer with SCADA or

HMI Program

Page 3

1 to N Configuration

Modbus Master

1. Higher Level PLC

2. Distributed Control System

3. Computer with SCADA or

HMI Program

RS485

T2 Maximum Configuration

1 Main Unit

3 Exp. Units

to 32 Stations

For high-speed data transfer, one of

Toshiba’s Tosline Data Highway

modules is recommended.

Page 4

3. External Features and Switch Settings

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