Omron CS1W-SCU31-V1, CS1W-SCB21-V1, CJ1W-SCU31-V1, CJ1W-SCU41-V1, CS1W-SCU41-V1 Operation Manual

Cat. No. W336-E1-09

SYSMAC
CS/CJ Series

CS1W-SCB@@-V1
Serial Communications Boards

CS1W-SCU@@-V1 and
CJ1W-SCU@@-V1
Serial Communications Units

OPERATION MANUAL

SYSMAC CS/CJ Series

Serial Communications Boards and
Serial Communications Units

Operation Manual

Revised February 2008

iv

Notice:

OMRON products are manufactured for use according to proper procedures by a qualified operator
and only for the purposes described in this manual.

The following conventions are used to indicate and classify precautions in this manual. Always heed
the information provided with them. Failure to heed precautions can result in injury to people or dam­age to property.

!DANGER Indicates an imminently hazardous situation which, if not avoided, will result in death or

serious injury. Additionally, there may be property damage.

!WARNING Indicates a potentially hazardous situation which, if not avoided, could result in death or

serious injury. Additionally, there may be property damage.

!Caution Indicates a potentially hazardous situation which, if not avoided, may result in minor or

moderate injury, or property damage.

OMRON Product References

All OMRON products are capitalized in this manual. The word “Unit” is also capitalized when it refers to
an OMRON product, regardless of whether or not it appears in the proper name of the product.

The abbreviation “Ch,” which appears in some displays and on some OMRON products, often means
“word” and is abbreviated “Wd” in documentation in this sense.

The abbreviation “PLC” means Programmable Controller. “PC” is used, however, in some Program­ming Device displays to mean Programmable Controller.

Visual Aids

The following headings appear in the left column of the manual to help you locate different types of
information.

 OMRON, 1999

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form, or
by any means, mechanical, electronic, photocopying, recording, or otherwise, without the prior written permission of
OMRON.

No patent liability is assumed with respect to the use of the information contained herein. Moreover, because OMRON is con­stantly striving to improve its high-quality products, the information contained in this manual is subject to change without
notice. Every precaution has been taken in the preparation of this manual. Nevertheless, OMRON assumes no responsibility
for errors or omissions. Neither is any liability assumed for damages resulting from the use of the information contained in
this publication.

Note Indicates information of particular interest for efficient and convenient opera-

tion of the product.

1,2,3...

1. Indicates lists of one sort or another, such as procedures, checklists, etc.

v

vi

TABLE OF CONTENTS

PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii

1 Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii

2 General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii

3 Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii

4 Operating Environment Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xix

5 Application Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xx

6 Conformance to EC Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxii

7 Unit Versions of CS/CJ-series Serial Communications Boards/Units . . . . . . . . . . . . . . . . . xxiv

8 Functions Added in the Unit Version 1.3 Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxviii

9 Functions Added in the Unit Version 1.2 Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxviii

SECTION 1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1-1 Using this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1-2 Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1-3 Protocol Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1-4 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1-5 System Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

1-6 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

1-7 Comparison to Previous Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

1-8 Selecting the Serial Communications Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

1-9 Basic Operating Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

SECTION 2

Initial Settings and I/O Memory Allocations . . . . . . . . . . . . 61

2-1 Component Names and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

2-2 Data Exchange with the CPU Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

2-3 I/O Memory Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74

SECTION 3

Installation and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

3-1 Installing a Serial Communications Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

3-2 Installing Serial Communications Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

3-3 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

3-4 RS-232C and RS-422A/485 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

SECTION 4

Using Host Link Communications . . . . . . . . . . . . . . . . . . . . 123

4-1 Host Link Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

4-2 Setup Area Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

4-3 Auxiliary Area and CIO Area Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

4-4 Communications Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

4-5 Changes from Previous Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

4-6 Host Link Function for Replacing Existing PLCs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

vii

TABLE OF CONTENTS

SECTION 5

Using Protocol Macros . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

5-1 Overview of the Protocol Macro Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

5-2 Setup Area Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

5-3 Auxiliary Area and CIO Area Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159

5-4 Using Protocol Macros . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176

5-5 Simple Backup Function (Backup of Protocol Macro Data). . . . . . . . . . . . . . . . . . . . . . . . . 187

5-6 Enhanced Protocol Macro Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190

SECTION 6

Serial Gateway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195

6-1 Serial Gateway Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .196

6-2 DM Area Allocations (Using Serial Gateway Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201

6-3 Auxiliary Area and CIO Area in Serial Gateway Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204

6-4 Using the Serial Gateway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .208

6-5 Protocol Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212

6-6 Serial Gateway. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226

6-7 Conditions Requiring Routing Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230

6-8 Communications Frames . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237

SECTION 7

No-protocol Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249

7-1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250

7-2 Allocation DM Area for No-protocol Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252

7-3 Auxiliary Area and CIO Area Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254

7-4 Basic Operating Procedure in No-protocol Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260

SECTION 8

Using 1:N NT Links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263

8-1 Overview of 1:N NT Links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264

8-2 Setup Area Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266

8-3 Auxiliary Area and CIO Area Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267

SECTION 9
Using Modbus-RTU Slave Mode

(Unit Version 1.3 or Later). . . . . . . . . . . . . . . . . . . . . . . . . . . 273

9-1 Modbus-RTU Slave System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274

9-2 Setup Area Allocations (Modbus-RTU Slave Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275

9-3 Auxiliary Area and CIO Area Allocations (Modbus-RTU Slave Mode) . . . . . . . . . . . . . . . 278

9-4 Communications Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290

9-5 Changes from Previous Products. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295

9-6 Modbus-RTU Slave Function for Replacing Existing PLCs. . . . . . . . . . . . . . . . . . . . . . . . . 298

viii

TABLE OF CONTENTS

SECTION 10

Loopback Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303

10-1 Executing Loopback Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .304

10-2 Setup Area Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305

10-3 CIO Area Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306

SECTION 11

Troubleshooting and Maintenance . . . . . . . . . . . . . . . . . . . . 307

11-1 Indicator Error Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308

11-2 Status Area Error Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .311

11-3 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 312

11-4 Error Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 347

11-5 Cleaning and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 354

11-6 Replacement Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .355

Appendices

A Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 359

B CompoWay/F Master Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 363

C C-mode (Host Link) Command Master . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 393

D Host Link FINS Command Master . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 417

E Mitsubishi Computer Link Master (A-compatible 1C Frame, Model 1) . . . . . . . . . . . . . . . 441

FE5@K Digital Controller Read Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 465

GE5@K Digital Controller Write Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 485

H E5ZE Temperature Controller Read Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 501

I E5ZE Temperature Controller Write Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 523

JE5@J Temperature Controller Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 543

KES100@ Digital Controller Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 559

LK3T@ Intelligent Signal Processor Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 599

M V500/V520 Bar Code Reader Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 621

N 3Z4L Laser Micrometer Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 633

O Visual Inspection System Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 669

P V600/V620 ID Controller Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 689

Q Hayes Modem AT Command Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 727

R Changing Communications Port Settings Using STUP(237) . . . . . . . . . . . . . . . . . . . . . . . 735

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 739

Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 749

ix

x

About this Manual:

This manual describes the installation and operation of the SYSMAC CS/CJ-series CS1W-SCB@@-V1
Serial Communications Boards and CS1W-SCU@@-V1 and CJ1W-SCU@@-V1 Serial Communica­tions Units and includes the sections described on the next page.

The Serial Communications Boards are classified as Inner Boards and the Serial Communications
Unit is classified as a CPU Bus Unit.

Please read this manual and all related manuals listed in the following table carefully and be sure you
understand the information provided before attempting to install and operate a Serial Communications
Board or Unit.

Name Cat. No. Contents

SYSMAC CS/CJ-series
CS1W-SCB@@-V1, CS1W-SCU@@-V1,
CJ1W-SCU@@-V1
Serial Communications Boards and
Serial Communications Unit Operation Manual (this
manual)

SYSMAC CS/CJ-series
CQM1H-PRO-E1, CQM1-PRO01-E,
C200H-PRO27-E
Programming Consoles Operation Manual

SYSMAC CS-series CS1G/H-CPU@@H, CS1G/H-
CPU@@-EV1
Programmable Controllers Operation Manual

SYSMAC CJ-series
CJ1G/H-CPU@@H, CJ1M-CPU@@,
CJ1G-CPU@@
Programmable Controllers Operation Manual

SYSMAC CS/CJ-series CS1G/H-CPU@@-EV1,
CS1G/H-CPU@@H,
CJ1G-CPU@@-E, CJ1G/H-CPU@@H
Programmable Controllers Programming Manual

SYSMAC CS/CJ-series CS1G/H-CPU@@H, CS1G/
H-CPU@@-EV1, CJ1G/H-CPU@@H, CJ1G-CPU@@,
CJ1M-CPU@@
Programmable Controllers
Instructions Reference Manual

SYSMAC CS/CJ-series
CS1G-/H-CPU@@H, CS1G/H-CPU@@-E, CS1W­SCB@@-V1, CS1W-SCU@@-V1, CJ1G/H-CPU@@H,
CJ1G-CPU@@, CJ1W-CPU@@, CJ1W-SCU@@-V1
Communications Commands Reference Manual

SYSMAC WS02-CXPC1-E-V60
CX-Programmer Operation Manual

SYSMAC WS02-PSTC1-E
CX-Protocol Operation Manual

SYSMAC CS/CJ-series
CS1W-ETN01, CS1W-ETN11, CJ1W-ETN11
Ethernet Unit Operation Manual

W336 Describes the use of Serial Communications Unit

and Boards to perform serial communications with
external devices, including the usage of standard
system protocols for OMRON products.

W341 Provides information on how to program and operate

CS/CJ-series PLCs using a Programming Console.

W339 Describes the installation and operation of the CS-

series PLCs.

W393 Describes the installation and operation of the CJ-

series PLCs.

W394 Describes the ladder diagram programming functions

and other functions supported by CS-series and CJ­series PLCs.

W340 Describes the ladder diagram programming instruc-

tions supported by CS-series and CJ-series PLCs.

W342 Describes the Host Link and FINS communications

commands used with CS-series and CJ-series PLCs.

W446 Provides information on how to use the CX-Program-

mer, a programming device that supports the CS­series and CJ-series PLCs.

W344 Describes the use of the CX-Protocol to create proto-

col macros as communications sequences to com­municate with external devices.

W343 Describes the installation and operation of CS1W-

ETN01, CS1W-ETN11, and CJ1W-ETN11 Ethernet
Unit.

xi

About this Manual, Continued

This manual contains the following sections.

Section 1 introduces the hardware and software functions of the Serial Communications Boards and
the Serial Communications Units, including the communications modes, system configurations, and
specifications.

Section 2 describes the components of the Serial Communications Boards and the Serial Communi­cations Units, the settings required for operation, and the memory allocated in the I/O memory of the
CPU Unit for controlling and monitoring communications.

Section 3 describes how to mounting the Serial Communications Boards and Serial Communications
Units, and how to connect the ports to external devices.

Section 4 describes the procedure and other information required to use Host Link communications.

Section 5 describes the procedure and other information required to use protocol macros.

Section 6 provides an overview of the Serial Gateway, information on I/O memory allocations, and

procedures for using the functions. Information on protocol conversion, routing table requirements, and
communications frames is also provided. The Serial Gateway can be used only for Unit Ver. 1.2 or
later.

Section 7 describes the procedure and other information required to use the no-protocol mode. This
mode is supported for Unit Ver. 1.2 or later only.

Section 8 describes the procedure and other information required to use 1:N NT Links to Programma­ble Terminals.

Section 9 describes the procedure and other information required to use Modbus-RTU slave mode.

Section 10 describes the procedure and other information required to conduct loopback test to check

the serial ports.

Section 11 describes the troubleshooting and maintenance procedures for the Serial Communications
Boards and the Serial Communications Units.

Appendix A to Appendix Q provide the specifications of the standard system protocols.

Appendix R provides information on using STUP(237) to change serial port settings.

!WARNING Failure to read and understand the information provided in this manual may result in per-

sonal injury or death, damage to the product, or product failure. Please read each section
in its entirety and be sure you understand the information provided in the section and
related sections before attempting any of the procedures or operations given.

xii

Read and Understand this Manual

Please read and understand this manual before using the product. Please consult your OMRON
representative if you have any questions or comments.

Warranty and Limitations of Liability

WARRANTY

OMRON's exclusive warranty is that the products are free from defects in materials and workmanship for a
period of one year (or other period if specified) from date of sale by OMRON.

OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, REGARDING NON­INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR PARTICULAR PURPOSE OF THE
PRODUCTS. ANY BUYER OR USER ACKNOWLEDGES THAT THE BUYER OR USER ALONE HAS
DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR
INTENDED USE. OMRON DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED.

LIMITATIONS OF LIABILITY

OMRON SHALL NOT BE RESPONSIBLE FOR SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES,
LOSS OF PROFITS OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS,
WHETHER SUCH CLAIM IS BASED ON CONTRACT, WARRANTY, NEGLIGENCE, OR STRICT
LIABILITY.

In no event shall the responsibility of OMRON for any act exceed the individual price of the product on which
liability is asserted.

IN NO EVENT SHALL OMRON BE RESPONSIBLE FOR WARRANTY, REPAIR, OR OTHER CLAIMS
REGARDING THE PRODUCTS UNLESS OMRON'S ANALYSIS CONFIRMS THAT THE PRODUCTS
WERE PROPERLY HANDLED, STORED, INSTALLED, AND MAINTAINED AND NOT SUBJECT TO
CONTAMINATION, ABUSE, MISUSE, OR INAPPROPRIATE MODIFICATION OR REPAIR.

xiii

Application Considerations

SUITABILITY FOR USE

OMRON shall not be responsible for conformity with any standards, codes, or regulations that apply to the
combination of products in the customer's application or use of the products.

At the customer's request, OMRON will provide applicable third party certification documents identifying
ratings and limitations of use that apply to the products. This information by itself is not sufficient for a
complete determination of the suitability of the products in combination with the end product, machine,
system, or other application or use.

The following are some examples of applications for which particular attention must be given. This is not
intended to be an exhaustive list of all possible uses of the products, nor is it intended to imply that the uses
listed may be suitable for the products:

• Outdoor use, uses involving potential chemical contamination or electrical interference, or conditions or
uses not described in this manual.

• Nuclear energy control systems, combustion systems, railroad systems, aviation systems, medical
equipment, amusement machines, vehicles, safety equipment, and installations subject to separate
industry or government regulations.

• Systems, machines, and equipment that could present a risk to life or property.

Please know and observe all prohibitions of use applicable to the products.

NEVER USE THE PRODUCTS FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR
PROPERTY WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO
ADDRESS THE RISKS, AND THAT THE OMRON PRODUCTS ARE PROPERLY RATED AND INSTALLED
FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM.

PROGRAMMABLE PRODUCTS

OMRON shall not be responsible for the user's programming of a programmable product, or any
consequence thereof.

xiv

Disclaimers

CHANGE IN SPECIFICATIONS

Product specifications and accessories may be changed at any time based on improvements and other
reasons.

It is our practice to change model numbers when published ratings or features are changed, or when
significant construction changes are made. However, some specifications of the products may be changed
without any notice. When in doubt, special model numbers may be assigned to fix or establish key
specifications for your application on your request. Please consult with your OMRON representative at any
time to confirm actual specifications of purchased products.

DIMENSIONS AND WEIGHTS

Dimensions and weights are nominal and are not to be used for manufacturing purposes, even when
tolerances are shown.

PERFORMANCE DATA

Performance data given in this manual is provided as a guide for the user in determining suitability and does
not constitute a warranty. It may represent the result of OMRON's test conditions, and the users must
correlate it to actual application requirements. Actual performance is subject to the OMRON Warranty and
Limitations of Liability.

ERRORS AND OMISSIONS

The information in this manual has been carefully checked and is believed to be accurate; however, no
responsibility is assumed for clerical, typographical, or proofreading errors, or omissions.

xv

xvi

PRECAUTIONS

This section provides general precautions for using the CS/CJ-series Serial Communications Boards and Units.

The information contained in this section is important for the safe and reliable application of Programmable
Controllers. You must read this section and understand the information contained before attempting to set up or
operate a PLC system.

1 Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii

2 General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii

3 Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii

4 Operating Environment Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xix

5 Application Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xx

6 Conformance to EC Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxii

6-1 Applicable Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxii

6-2 Concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxii

6-3 Conformance to EC Directives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxiii

6-4 EMI Measures for Serial Communications Boards and Units . . . . . xxiii

6-5 EMS Measures for Serial Communications Units . . . . . . . . . . . . . . xxiv

7 Unit Versions of CS/CJ-series Serial Communications Boards/Units . . . . . . xxiv

8 Functions Added in the Unit Version 1.3 Upgrade . . . . . . . . . . . . . . . . . . . . . xxviii

9 Functions Added in the Unit Version 1.2 Upgrade . . . . . . . . . . . . . . . . . . . . . xxviii

xvii

Intended Audience 1

1 Intended Audience

This manual is intended for the following personnel, who must also have
knowledge of electrical systems (an electrical engineer or the equivalent).

• Personnel in charge of installing FA systems.

• Personnel in charge of designing FA systems.

• Personnel in charge of managing FA systems and facilities.

2 General Precautions

The user must operate the product according to the performance specifica­tions described in the operation manuals.

Before using the product under conditions which are not described in the
manual or applying the product to nuclear control systems, railroad systems,
aviation systems, vehicles, combustion systems, medical equipment, amuse­ment machines, safety equipment, and other systems, machines, and equip­ment that may have a serious influence on lives and property if used
improperly, consult your OMRON representative.

Make sure that the ratings and performance characteristics of the product are
sufficient for the systems, machines, and equipment, and be sure to provide
the systems, machines, and equipment with double safety mechanisms.

This manual provides information for programming and operating the Unit. Be
sure to read this manual before attempting to use the Unit and keep this man­ual close at hand for reference during operation.

!WARNING It is extremely important that a PLC and all PLC Units be used for the speci-

fied purpose and under the specified conditions, especially in applications that
can directly or indirectly affect human life. You must consult with your OMRON
representative before applying a PLC System to the above-mentioned appli­cations.

3 Safety Precautions

!WARNING Provide safety measures in external circuits (i.e., not in the Programmable

Controller), including the following items, to ensure safety in the system if an
abnormality occurs due to malfunction of the PLC or another external factor
affecting the PLC operation. Not doing so may result in serious accidents.

• Emergency stop circuits, interlock circuits, limit circuits, and similar safety
measures must be provided in external control circuits.

• The PLC will turn OFF all outputs when its self-diagnosis function detects
any error or when a severe failure alarm (FALS) instruction is executed.
As a countermeasure for such errors, external safety measures must be
provided to ensure safety in the system.

• The PLC outputs may remain ON or OFF due to deposition or burning of
the output relays or destruction of the output transistors. As a counter­measure for such problems, external safety measures must be provided
to ensure safety in the system.

• When the 24-V DC output (service power supply to the PLC) is over­loaded or short-circuited, the voltage may drop and result in the outputs

xviii

Operating Environment Precautions 4

being turned OFF. As a countermeasure for such problems, external
safety measures must be provided to ensure safety in the system.

!WARNING Do not attempt to take any Unit apart while the power is being supplied. Doing

so may result in electric shock.

!WARNING Do not touch any of the terminals or terminal blocks while the power is being

supplied. Doing so may result in electric shock.

!WARNING Do not attempt to disassemble, repair, or modify any Units. Any attempt to do

so may result in malfunction, fire, or electric shock.

!Caution Execute online edit only after confirming that no adverse effects will be

caused by extending the cycle time. Otherwise, the input signals may not be
readable.

4 Operating Environment Precautions

!Caution Do not operate the control system in the following places:

• Locations subject to direct sunlight.

• Locations subject to temperatures or humidity outside the range specified
in the specifications.

• Locations subject to condensation as the result of severe changes in tem­perature.

• Locations subject to corrosive or flammable gases.

• Locations subject to dust (especially iron dust) or salts.

• Locations subject to exposure to water, oil, or chemicals.

• Locations subject to shock or vibration.

!Caution Take appropriate and sufficient countermeasures when installing systems in

the following locations:

• Locations subject to static electricity or other forms of noise.

• Locations subject to strong electromagnetic fields.

• Locations subject to possible exposure to radioactivity.

• Locations close to power supplies.

!Caution The operating environment of the PLC System can have a large effect on the

longevity and reliability of the system. Improper operating environments can
lead to malfunction, failure, and other unforeseeable problems with the PLC
System. Be sure that the operating environment is within the specified condi­tions at installation and remains within the specified conditions during the life
of the system. Follow all installation instructions and precautions provided in
the operation manuals.

xix

Application Precautions 5

5 Application Precautions

Observe the following precautions when using the PLC System.

!WARNING Always heed these precautions. Failure to abide by the following precautions

could lead to serious or possibly fatal injury.

• Always connect to a ground of 100
connecting to a ground of 100

• Always turn OFF the power supply to the PLC before attempting any of
the following. Not turning OFF the power supply may result in malfunction
or electric shock.

• Mounting or dismounting Power Supply Units, I/O Units, CPU Units,
Serial Communications Units, or any other Units.

• Assembling the Units.

• Setting DIP switches or rotary switches.

• Connecting cables or wiring the system.

• Mounting or dismounting terminal blocks.

!Caution Failure to abide by the following precautions could lead to faulty operation of

the PLC or the system, or could damage the PLC or PLC Units. Always heed
these precautions.

• Fail-safe measures must be taken by the customer to ensure safety in the
event of incorrect, missing, or abnormal signals caused by broken signal
lines, momentary power interruptions, or other causes.

• Take appropriate measures to ensure that the specified power with the
rated voltage and frequency is supplied. Be particularly careful in places
where the power supply is unstable. An incorrect power supply may result
in malfunction.

• Tighten the mounting screws at the bottom of Serial Communications
Units to a torque of 0.4 N
malfunction.

• Leave the label attached to the Unit when wiring. Removing the label may
result in malfunction if foreign matter enters the Unit.

• Remove the label after the completion of wiring to ensure proper heat dis­sipation. Leaving the label attached may result in malfunction.

• Always check polarity before wiring RS-422A/485 connectors. The polar­ity for the SDA/B and RDA/B signals can be different for some external
devices.

• Check to be sure that terminating resistors have been correctly installed
for RS-422A/485 systems before starting operation.

• Disconnect the LG terminal of the Power Supply Unit from the GR termi­nal when performing insulation and dielectric strength tests.

• Never turn OFF the power supply while writing protocol macro data.

• Wire all connections correctly according to instructions in this manual.

• Check terminal blocks completely before mounting them.

• Double-check all wiring and switch settings before turning ON the power
supply. Incorrect wiring may result in burning.

⋅m. An incorrect tightening torque may result in

Ω or less when installing the Units. Not

Ω or less may result in electric shock.

xx

Application Precautions 5

• Be sure that the Bus Connection Unit and other items with locking devices
are properly locked into place. Improper locking may result in malfunction.

• Check the user program for proper execution before actually running it on
the Unit. Not checking the program may result in an unexpected opera­tion.

• Confirm that no adverse effect will occur in the system before attempting
any of the following. Not doing so may result in an unexpected operation.

• Changing the operating mode of the PLC (including the setting of the
startup operating mode).

• Force-setting/force-resetting any bit in memory.

• Changing the present value of any word or any set value in memory.

• Do not install the product near devices generating strong high-frequency
noise.

• Do not drop the product or subject it to excessive vibration or shock.

• Observe the following precautions for communications cables.

• Do not lay communications cables near power lines or high-voltage
lines.

• Always lay communications cables in ducts.

• Do not pull on the communications cables or bend the communications
cables beyond their natural limit. Doing either of these may break the
cables.

• Do not place objects on top of the communications cables or other wir­ing lines. Doing so may break the cables.

• Before touching a Unit, be sure to first touch a grounded metallic object in
order to discharge any static built-up. Not doing so may result in malfunc­tion or damage.

• Resume operation only after transferring to the new CPU Unit the con­tents of the DM Area, HR Area, and other data required for resuming
operation. Not doing so may result in an unexpected operation.

• Do not touch circuit boards or the components mounted to them with your
bare hands. There are sharp leads and other parts on the boards that
may cause injury if handled improperly.

• When transporting or storing Boards, wrap them in material that will pro­tect LSIs, ICs, and other components from static electricity and be sure
that they remain within the storage temperature range.

• When creating Host Link FINS command frames using the CMND(490)
instruction, always set the unit number for Host Link incremented by one
(1 to 32) for the remote destination (send destination) node address (word
C+3, bits 08 to 15 of the CMND(490) instruction). Do not set the unit num­ber of the actual Host Link slave (0 to 31). Using the Host Link unit num­ber without incrementing by one will access the PLC with the entered
Host Link unit number less one.
For example, specify the remote PLC with Host Link unit number 2 by
entering 3 for the remote destination node address. If 2 is entered, the
PLC with Host Link unit number 1 will be accessed.
To access a PLC on a Host Link FINS network using the Serial Gateway
from CX-Programmer, however, enter the actual Host Link unit number,
without incrementing by one. (Select Change PLC, click the Display

Serial Gateway Guide Button, and set unit number in the Host Link
SYSWAY Settings field of the Serial Gateway Guide Dialog Box.

xxi

Conformance to EC Directives 6

• When the Serial Gateway is executed during protocol macro execution,
the communications sequence contents and the FINS command recep­tion timing may suspend step transition of the communications sequence
(when the next step does not contain the RECEIVE command, the Serial
Gateway will be executed by interrupting the sequence before the next
step, and the step transition will be suspended).
Use the Serial Gateway send start timeout function to monitor at the
source of the FINS command whether step transition in the communica­tions sequence has been suspended due to execution of the Serial Gate­way. If the converted command does not start to be sent within the set
time, either retry executing the FINS command or change the communi­cations sequence.

• When using 2-wire RS-422A/485 communications in Protocol Macro
Mode, set only modem controls for the send control parameters, and do
not use RS/CS flow controls.

• The following operations will result if the Serial Gateway is executed either
using a pre-Ver. 1.2 Board/Unit or using a Ver. 1.2 or later Unit/Board with­out Serial Gateway or protocol macro mode set for serial communications
at the serial port.

• If either NT Link or loopback test mode is used for serial communica­tions, or if protocol macro mode is used with a pre-Ver. 1.2 Board/Unit,
an undefined command response will be returned (end code: 0401
hex).

• If Host Link mode is used for serial communications, the message will
be converted into a FINS command using Host Link slave-initiated
communications and transferred (this will mainly result in a response
timeout being returned, depending on the remote device (end code:
0205 hex))

• If a no-protocol instruction is sent to a pre-Ver. 1.2 Board/Unit or the serial
port of a Board/Unit with Unit Ver. 1.2 or later using a serial communica­tions mode other than no-protocol mode, the following operations will
occur.

• If TXD(236)/RXD(235) is sent to the Board, Auxiliary Area bit A424204
(Inner Board Service Failure Flag) will turn ON.

• If TXDU(256)/RXDU(255) is sent to the Unit and the serial communi­cations mode is set to protocol macro, NT Link, loopback test, or Serial
Gateway mode, an undefined command error (end code: 0401 hex)
will be returned.
If the serial communications mode is set to Host Link mode and the in­struction will be converted to a slave-initiated function FINS command
and transferred. (Depending on the remote device, a response timeout
(end code: 0205 hex) is likely to be returned.)

6 Conformance to EC Directives

6-1 Applicable Directives

•EMC Directives

• Low Voltage Directive

6-2 Concepts

EMC Directives

OMRON devices that comply with EC Directives also conform to the related
EMC standards so that they can be more easily built into other devices or the

xxii

Conformance to EC Directives 6

overall machine. The actual products have been checked for conformity to
EMC standards (see the following note). Whether the products conform to the
standards in the system used by the customer, however, must be checked by
the customer.

EMC-related performance of the OMRON devices that comply with EC Direc­tives will vary depending on the configuration, wiring, and other conditions of
the equipment or control panel on which the OMRON devices are installed.
The customer must, therefore, perform the final check to confirm that devices
and the overall machine conform to EMC standards.

Note Applicable EMS (Electromagnetic Susceptibility) and EMI (Electromagnetic

Interference) standards in the EMC (Electromagnetic Compatibility) standards
are as follows:

Unit/Board EMS EMI

CS1W-SCB21-V1/
SCB41-V1
CS1W-SCU21-V1

CJ1W-SCU21-V1
CJ1W-SCU31-V1
CJ1W-SCU41-V1
CS1W-SCU31-V1

Low Voltage Directive

Always ensure that devices operating at voltages of 50 to 1,000 VAC and 75
to 1,500 VDC meet the required safety standards for the PLC (EN61131-2).

EN61131-2

EN61000-6-2

EN61000-6-4
(Radiated emission: 10-m
regulations)

6-3 Conformance to EC Directives

The CS/CJ-series PLCs comply with EC Directives. To ensure that the
machine or device in which the CS/CJ-series PLC is used complies with EC
directives, the PLC must be installed as follows:

1,2,3...

1. The CS/CJ-series PLC must be installed within a control panel.

2. You must use reinforced insulation or double insulation for the DC power
supplies used for the communications power supply and I/O power sup­plies.

3. CS/CJ-series PLCs complying with EC Directives also conform to the
Common Emission Standard (EN61000-6-4). Radiated emission charac­teristics (10-m regulations) may vary depending on the configuration of the
control panel used, other devices connected to the control panel, wiring,
and other conditions. You must therefore confirm that the overall machine
or equipment complies with EC Directives.

6-4 EMI Measures for Serial Communications Boards and Units

The CS/CJ-series PLCs conform to the Common Emission Standards
(EN61000-6-4) of the EMC Directives. However, the noise generated from
Serial Communications Board or Unit communications cables may not satisfy
these standards. In such a case, commercially available ferrite cores must be
placed on the communications cable or other appropriate countermeasures
must be provided external to the PLC.

xxiii

Unit Versions of CS/CJ-series Serial Communications Boards/Units 7

Recommended Ferrite Cores

The following ferrite core (data line noise filter) is recommended:

0443-164151 by Fair-Rite Products Corp.
Low impedance, 25 MHz: 90

Ω, 100 MHz: 160 Ω

Recommended Mounting Method

Mount the core on one turn of the communications cable, as shown in the fol­lowing illustration.

Mount the cores as lost to the end of the communications cable as possible,
as shown in the following illustration.

Serial
Commu­nications
Unit/Board

6-5 EMS Measures for Serial Communications Units

The immunity testing conditions for the CJ1W-SCU41-V1 Serial Communica­tions Unit are as follows: A ferrite core is mounted on the test cable connected
to the RS-422A/485 port.

Refer to 6-4 EMI Measures for Serial Communications Boards and Units for
information on mounting the ferrite core.

7 Unit Versions of CS/CJ-series Serial Communications

Boards/Units

Unit Versions

A “unit version” has been introduced to manage CS/CJ-series Serial Commu­nications Units/Boards according to differences in functionality accompanying
upgrades.

1. Unit Version Notation on Products

The unit version code is provided on the nameplate of the CS-series Serial
Communications Boards and Units for which unit versions are being man­aged, as shown below for the Loop Control Board. This system applies to
Serial Communications Units or Boards with unit version 1.2 or later.

• Serial Communications Boards

xxiv

Unit Versions of CS/CJ-series Serial Communications Boards/Units 7

Example: CS1W-SCB21-V1 CS-series
Serial Communications Board

Nameplate

Unit version 1.3

CS1W-SCB21-V1

SERIAL COMMUNICATION BOARD

• Serial Communications Units

Example: CS1W-SCU21-V1 CS-series
Serial Communications Unit

Nameplate

SERIAL COMMUNICATION UNIT

:

Lot No. 051020 Ver.1.3

OMRON Corporation

CS1W-SCU21-V1

MADE IN JAPAN

Unit version 1.3

2. Confirming Unit Versions with Support Software

CX-Programmer version 5.0 can be used to confirm the unit version in the
Unit Manufacturing Information.

■Boards

In the I/O Table Window, right-click on the CPU Unit, and then select Unit
Manufacturing Information – Inner Board

■Units

1. In the I/O Table Window, right-click on the Serial Communications Unit,

and then select Unit Manufacturing Information.

2. The following Unit Manufacturing Information Dialog Box will be displayed.

Lot No. 051020 0000 Ver.1.3

OMRON Corporation

MADE IN JAPAN

xxv

Unit Versions of CS/CJ-series Serial Communications Boards/Units 7

The unit version is displayed.

Example: In this Unit Manufacturing Information Dialog Box, unit version 1.3 is
displayed. Use this dialog box to confirm the unit version of the Serial Com­munications Unit that is connected online.

3. Using the Unit Version Labels

Unit version labels are provided with the product. These labels can be
attached to the front of previous Serial Communications Boards/Units to dif­ferentiate between Serial Communications Boards/Units of different unit ver­sions.

Unit Version Notation

The unit versions are indicated in this manual as follows:

Notation in product

Ver. 1.3 or later after
the lot number

Ver.1.2 after the lot
number

Blank after the lot
number

nameplate

Notation in this manual Remarks

CS/CJ-series Serial Commu­nications Units with unit ver­sion 1.3 or later

CS/CJ-series Serial Commu­nications Units with unit ver­sion 1.2

Pre-Ver. 1.2 CS/CJ-series
Serial Communications Units

Information for which no par­ticular version is specified
applies to all unit versions.

xxvi

Unit Versions of CS/CJ-series Serial Communications Boards/Units 7

Function Support by Unit Version

Product Earlier version

CS Series Serial Communica-

tions Boards

Serial Communica­tions Units

CJ Series Serial Communica-

tions Units

Serial gateway Not supported Supported Supported (Same as pre-

Host Link 1:1 links Not supported Supported Supported (Same as pre-

Host Link compatible
device selection

No-protocol Not supported Supported Supported (Same as pre-

Protocol
macro

Functions

Standard system protocol addi­tions

MODBUS slave protocol added --- --- Supported

Link word specifica­tion data exchange
timing

Reception buffer pro­cessing for
PMCR(260) instruc­tion execution

Baud rate (bps) 38,400 max. (57,600 and

(pre-ver. 1.2)

CS1W-SCB21-V1 CS1W-SCB21-V1 (Same

CS1W-SCB41-V1 CS1W-SCB41-V1 (Same

CS1W-SCU21-V1 CS1W-SCU21-V1 (Same

--- --- CS1W-SCU31-V1
CJ1W-SCU21 CJ1W-SCU21-V1 CJ1W-SCU21-V1 (Same

--- --- CJ1W-SCU31-V1
CJ1W-SCU41 CJ1W-SCU41-V1 CJ1W-SCU41-V1 (Same

Not supported Supported Supported (Same as pre-

On-request I/O refresh­ing only

Clearing only Select to clear or hold

115,200 not supported)
Not supported Supported Supported (Same as pre-

Unit version 1.2 Unit version 1.3

CS1W-SCB21-V1 (Same

as pre-ver. 1.2)

as pre-ver. 1.2)

as pre-ver. 1.2)

On-request I/O refreshing
Continuous I/O refreshing

contents.

57,600 supported. 57,600 supported. (Same

as pre-ver. 1.2)
CS1W-SCB41-V1 (Same

as pre-ver. 1.2)
CS1W-SCU21-V1 (Same

as pre-ver. 1.2)

as pre-ver. 1.2)

as pre-ver. 1.2)

ver. 1.2)

ver. 1.2)

ver. 1.2)

ver. 1.2)
On-request I/O refreshing

Continuous I/O refreshing
(Same as pre-ver. 1.2)

Select to clear or hold con­tents. (Same as pre-ver.

1.2)

as pre-ver. 1.2)

ver. 1.2)

Note Make sure that a CS/CJ-series CPU Unit with unit version 3.0 or later is used

when using no-protocol mode.

Unit Versions and Manufacturing Dates/Lot Numbers

Classification Type Model May 2004 June 2003 December 2005

Inner Boards Serial Communica-

CPU Bus Units Serial Communica-

CPU Unit Sup­port Software

tions Boards

tions Units

CX-Programmer WS02-CXPC1-JV@ Ver. 4.0 or earlier Ver. 5.0 Version 6.1

CS1W-SCB21-V1 Pre-Ver. 1.2 Unit version 1.2
CS1W-SCB41-V1

CS1W-SCU21-V1 Pre-Ver. 1.2 Unit version 1.2
CS1W-SCU21-V1
CS1W-SCU41-V1
CS1W-SCU31-V1 --- --- Unit version 1.3
CJ1W-SCU31-V1 --- ---

(Lot No.: 040617
and later)

(Lot No.: 040617
and later)

Unit version 1.3

Unit version 1.3

(Available April,

2006)

xxvii

Functions Added in the Unit Version 1.3 Upgrade 8

8 Functions Added in the Unit Version 1.3 Upgrade

Functions Added in Version Upgrade

The following table provides a comparison between the functions provided in
the upgrade to unit version 1.3 or later of CS1W-SCB@@-V1 Serial Communi­cations Boards and CS1W-SCU@@-V1, CJ1W-SCU@@-V1 Serial Communi­cations Units, and the functionality of earlier versions.

Item Previous unit versions Unit version 1.3 and later

Serial communica­tions mode

Modbus-RTU slave mode Not supported Supported

9 Functions Added in the Unit Version 1.2 Upgrade

Upgraded Models

The model numbers of CS-series Serial Communications Units/Boards have
not changed. A “-V1” suffix has been added to the model numbers of CJ­series Serial Communications Units with the unit version 1.2 upgrade, as
shown in the following table.

PLC Product Specifications Model Model number

CS
Series

CJ
Series

Serial Com­munications
Boards

Serial Com­munications
Units

Serial Com­munications
Units

RS-232C
RS-232C × 1

RS-232C
RS-422A/485

1

RS-232C
RS-232C × 1

RS-232C × 1,
RS-232C × 1

RS-232C
RS-422A/485

1

CS1W-SCB21-V1 → Same

× 1,

CS1W-SCB41-V1 → Same

× 1,

×

CS1W-SCU21-V1 → Same

× 1,

CJ1W-SCU21 → CJ1W-SCU21-V1

CJ1W-SCU41 → CJ1W-SCU41-V1

× 1,

×

after upgrade to

unit version 1.2

xxviii

Functions Added in the Unit Version 1.2 Upgrade 9

Functions Added in Version Upgrade

The following table provides a comparison between the functions provided in
the upgrade to unit version 1.2 or later of CS1W-SCB@@-V1 Serial Communi­cations Boards and CS1W-SCU@@-V1, CJ1W-SCU@@-V1 Serial Communi­cations Units, and the functionality of earlier versions.

Serial com­munications
mode

Item Earlier versions

Serial Gateway Not supported Supported

Host Link 1:1 protocol Not supported (1:N

Host Link
compatible
device selec­tion

No-protocol Not supported Supported, but only when using a CS/CJ-series

(pre-Ver.1.2)

Host Links only)

Not supported (not
completely compati­ble with C-series
Host Link and CVM1/
CV-series Host Link)

The received FINS command can be converted
into serial communications protocol and then con­verted into either of the following protocols (using
the Serial Gateway mode).

• CompoWay/F

•Modbus-RTU

• Modbus-ASCII

• Host Link FINS (This protocol can be used to
make the PLC function as the Host Link Mas­ter.)

The Serial Gateway can also be used in protocol
macro mode. This option enables, for example, pro­gramming or monitoring of a serially connected
PLC from a CX-Programmer that is connected to
the PLC during execution of protocol macros (e.g.,
Host Link Master).

Supported
This protocol functions the same as the 1:1 Host

Link supported by the earlier C200H, C1000H, and
C2000H Series, thereby enabling the use of host
computer programs for 1:1 Host LInks created
using these earlier PLCs.

Note: CS/CJ-series, C200HS/HX/HG/HE(-Z),

@, CQM1@, and CVM1/CV Series all support

CPM
1:N Host Links only. C200H and C500 Host LInk
Units support both 1:1 and 1:N Host Links.

The compatible device mode enables full compati­bility of Host Link functions (see note) with C-series
Host Link and CVM1/CV-series Host Link.

Note: E.g., differences in specifications for delimiter
words in response frame data

CPU Unit with unit version 3.0 or later.
(The no-protocol mode that was previously possi­ble only at the built-in RS-232C port of CPU Unit is
now available for the Serial Communications
Boards and Units.)
This protocol is mainly used for communications
with devices that perform input or output only, such
as bar code readers and printers.

This mode enables no-protocol communications
even if the CPU Unit’s built-in RS-232C port is
being used for another application.

Unit version 1.2 or later

xxix

Functions Added in the Unit Version 1.2 Upgrade 9

Enhanced
protocol
macro func­tions

Standard sys­tem protocol

Item Earlier versions

Link word specification data
exchange timing

Reception buffer processing
for PMCR(260) instruction
execution (immediately
before communications
sequence execution)

Baud rate for protocol macro
mode

Host Link C-mode Command
Master

Host Link FINS Command
Master

(pre-Ver.1.2)

On-request I/O
refreshing only
(request to refresh
sent to CPU Unit at
every send/receive
command execution,
and data exchanged
during I/O refresh)

In this method, after
the send command is
executed, a delay
occurs before the
actual message is
sent.

Clearing to zero only Select to clear or hold the contents of the reception

38,400 bps max.
(57,600 bps not sup­ported)

None (protocols must
be created using CX­Protocol)

Unit version 1.2 or later

Continuous I/O refreshing (selected in DM Area
settings) is supported in addition to the on-request
I/O refreshing available in earlier models.
Continuous I/O refreshing is performed from the
CPU Unit during protocol macro execution, regard­less of requests from the Board/Unit, and data in
the Board/Unit is accessed during send/receive
command execution. When the send command is
executed with this method, the actual message can
be sent immediately.

buffer during full-duplex communications (set in the
allocation DM Area).

This enables the data in the reception buffer
received in the previous communications sequence
to be held after switching the communications
sequence during full-duplex communications.

57,600 bps supported (115,200 bps not supported)

Provided
A Host Link Master can
be used to easily access
the Host Link slave PLC
(e.g., A PLC slave on a
moving body can be
accessed via a WM­series Wireless Modem
in a Host Link.)

Host Link C-mode com­mands can be used to
access a C-series or CS/
CJ-series PLC slave.

Host Link FINS com­mands can be used to
access a CS/CJ-series
or CVM1/CV-series PLC
slave.

This protocol can also
be used to access slave
PLCs on the network.

xxx

Mitsubishi Computer Link
Master (A-compatible, 1C
frame, model 1)

CompoWay/F Master --- Communications sequences with different send

Provided
Computer Link commands can be used to access a

Mitsubishi PLC (Sequencer CPU Module) slave.

and receive protocols are provided by using send/
receive commands with ASCII conversion.

The communications sequences have been
expanded to include CompoWay/F commands
such as VARIABLE AREA READ/WRITE and
OPERATING INSTRUCTIONS.

SECTION 1

Introduction

This section introduces the hardware and software functions of the Serial Communications Boards and the Serial
Communications Units, including the communications modes, system configurations, and specifications.

1-1 Using this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1-2 Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1-2-1 Serial Communications Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1-2-2 Serial Communications Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1-3 Protocol Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1-3-1 Host Link Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1-3-2 Protocol Macros . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1-3-3 1:N NT Links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

1-3-4 Loopback Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1-3-5 Serial Gateway Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1-3-6 No-protocol Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1-3-7 Modbus-RTU Slave Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1-4 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1-4-1 Serial Communications Boards and Units . . . . . . . . . . . . . . . . . . . . 12

1-4-2 Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1-5 System Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

1-6 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

1-6-1 Serial Communications Boards and Unit . . . . . . . . . . . . . . . . . . . . . 23

1-6-2 General Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

1-6-3 Protocol Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

1-7 Comparison to Previous Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

1-8 Selecting the Serial Communications Mode. . . . . . . . . . . . . . . . . . . . . . . . . . 41

1-9 Basic Operating Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

1-9-1 Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

1-9-2 Explanation of Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

1