Omron CQM1H-SCB41 User Manual

Cat.No. W365–E1–1

SYSMAC CQM1H Series

CQM1H-SCB41
Serial Communications Board

OPERATION MANUAL

SYSMAC
CQM1H Series

CQM1H-SCB41

Serial Communications Board

Operation Manual

Produced September 1999

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

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serious injury.

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

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serious injury.

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

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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 “PC” means Programmable Controller and is not used as an abbreviation for any­thing else.

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 operation

of the product.

1, 2, 3... 1. Indicates lists of one sort or another, such as procedures, checklists, etc.

v

About this Manual:

This manual describes the installation and operation of the SYSMAC CQM1H-series CQM1H-SCB41 Se­rial Communications Board and includes the sections described below.

The Serial Communications Board is classified as an Inner Board.
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.

Name Cat. No. Contents

SYSMAC CQM1H-series
CQM1H-SCB41
Serial Communications Board
Operation Manual

SYSMAC CQM1H-series
Programmable Controllers
Operation Manual

SYSMAC CQM1H-series
Programmable Controllers
Programming Manual

SYSMAC WS02-PSTC1-E
CX-Protocol Operation Manual

W365-E1-1 Describes the use of the Serial Communications Board to

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

Host Link communications commands are described in the

SYSMAC CQM1H-series Programmable Controllers
Programming Manual (W364).

Creating protocol macros is described in the CX-Protocol
Operation Manual (W344).

W363-E1-1 Describes the installation and operation of the

CQM1H-series PCs.

W364-E1-1 Describes the ladder diagram programming instructions

supported by CQM1H-series PCs, Host Link commands,
and other programming information.

W344-E1-1 Describes the use of the CX-Protocol to create protocol

macros as communications sequences to communicate with
external devices.

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

Section 2 describes the components of the Serial Communications Board, how to connect it in the CPU
Unit, and how to connect it to external devices.

Section 3 describes the settings, control bits, flags, and status information available in the CPU Unit for
use with the Serial Communications Board.

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 information required to use no-protocol communications on a Serial Communications

Board port.
Section 7 provides information required to create 1:1 data links through a Serial Communications Board

port.
Section 8 describes the procedure and other information required to use 1:N-mode and 1:1-mode NT

Links to Programmable Terminals (PTs).
Section 9 describes the troubleshooting and maintenance procedures for the Serial Communications

Boards.
Appendix A to Appendix N provide the specifications of the standard system protocols.

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

personal 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.

vii

TABLE OF CONTENTS

PRECAUTIONS xi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 Intended Audience xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 General Precautions xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Safety Precautions xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Operating Environment Precautions xiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 Application Precautions xiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6 Conformance to EC Directives xv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 1

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

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

1-2 Protocol Overview 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-3 Specifications 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-4 Basic Operating Procedure 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 2

Board Components and Installation 9. . . . . . . . . . . . . . . . .

2-1 Component Names and Functions 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2 Installation 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-3 Wiring 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 3

Default Settings and Related Bits/Flags 27. . . . . . . . . . . . . .

3-1 Overview 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-2 PC Setup Settings 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-3 Control Bits, Flags, and Status Information 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 4

Host Link Communications 33. . . . . . . . . . . . . . . . . . . . . . .

4-1 Host Link Communications 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-2 Application Procedure 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-3 Connections 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-4 Host Link Communications 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-5 Changes from Previous Products 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 5

Protocol Macros 57. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-1 Overview of the Protocol Macro Functions 58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-2 Restrictions in Using the CX-Protocol 65. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-3 Application Procedure 66. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-4 Connections 70. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-5 Protocol Structure 76. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-6 Control Bits, Flags, and Status Information 80. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-7 Using Protocol Macros 85. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 6

No-protocol Communications 97. . . . . . . . . . . . . . . . . . . . . .

6-1 Overview 98. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-2 Application Procedure 100. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-3 Connections 101. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-4 Using No-protocol Communications 102. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

viii

TABLE OF CONTENTS

SECTION 7

Communications for 1:1 Data Links 107. . . . . . . . . . . . . . . .

7-1 Overview 108. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7-2 Application Procedure 109. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7-3 Connections 110. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7-4 Using 1:1 Data Links 111. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 8

NT Link Communications 113. . . . . . . . . . . . . . . . . . . . . . . . .

8-1 Overview of NT Links 114. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8-2 Application Procedure 116. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8-3 Connections 117. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 9

Troubleshooting and Maintenance 119. . . . . . . . . . . . . . . . . .

9-1 Front-panel Indicator Error Displays 120. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-2 Troubleshooting 121. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-3 Cleaning and Inspection 130. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-4 Board Replacement 132. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Appendices

A Introduction 135. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

B CompoWay/F Master Protocol 137. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

C E5jK Digital Controller Read Protocol 153. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

D E5jK Digital Controller Write Protocol 171. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

E E5ZE Temperature Controller Read Protocol 187. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

F E5ZE Temperature Controller Write Protocol 209. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

G E5jJ Temperature Controller Protocol 229. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

H ES100j Digital Controller Protocol 243. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

I K3Tj Intelligent Signal Processor Protocol 283. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

J V500/V520 Bar Code Reader Protocol 305. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

K 3Z4L Laser Micrometer Protocol 317. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

L Visual Inspection System Protocol 349. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

M V600/V620 ID Controller Protocol 367. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

N Hayes Modem AT Command Protocol 403. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Index 411. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Revision History 419. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ix

PRECAUTIONS

This section provides general precautions for using the Serial Communications Boards.

The information contained in this section is important for the safe and reliable application of the Serial Communica­tions Boards and the PC in general. You must read this section and understand the information contained before at­tempting to set up or operate a PC system containing a Serial Communications Board.

1 Intended Audience xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 General Precautions xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Safety Precautions xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Operating Environment Precautions xiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 Application Precautions xiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6 Conformance to EC Directives xv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-1 Applicable Directives xv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-1-1 Concepts xv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-1-2 Conformance to EC Directives xv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

xi

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.

3Conformance to EC Directives

WARNING It is extremely important that a Serial Communications Board and all related

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units be used for the specified 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 Serial
Communications Board to the above mentioned applications.

3 Safety Precautions

WARNING Never attempt to disassemble any Units while power is being supplied. Doing so

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may result in electric shock.

WARNING The CPU Unit refreshes I/O even when the program is stopped (i.e., even in

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PROGRAM mode). Confirm safety thoroughly in advance before changing the
status of any part of memory allocated to I/O Units, Inner Boards, or Dedicated
I/O Units. Any changes to the data allocated to any Unit may result in
unexpected operation of the loads connected to the Unit. Any of the following
operation may result in changes to memory status.

• Transferring I/O memory data to the CPU Unit from a Programming Device.

• Changing present values in memory from a Programming Device.

• Force-setting/-resetting bits from a Programming Device.

• Transferring I/O memory files from a Memory Card or EM file memory to the

CPU Unit.

• Transferring I/O memory from a host computer or from another PC on a net­work.

xii

WARNING Never touch any of the terminals while power is being supplied. Doing so may

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result in electric shock.

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

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by extending the cycle time. Otherwise, input signals may not be read properly.

4 Operating Environment Precautions

Caution Do not operate the control system in the following locations:

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• 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

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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.

5Conformance to EC Directives

Caution The operating environment of the PC System can have a large effect on the lon-

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gevity and reliability of the system. Improper operating environments can lead to
malfunction, failure, and other unforeseeable problems with the PC 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.

5 Application Precautions

Observe the following precautions when using the PC.

WARNING Failure to abide by the following precautions could lead to serious or possibly

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fatal injury. Always heed these precautions.

• Always ground the system to 100 Ω or less when installing the system to pro­tect against electrical shock.

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

• Assembling the Units or mounting the Serial Communications Board.

• Setting DIP switches or rotary switches.

• Connecting or wiring the cables.

• Connecting or disconnecting the connectors.

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

!

PC or the system or could damage the PC or PC Units. Always heed these pre­cautions.

• Do not turn OFF the power supply while transferring protocol macro data.

• 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.

xiii

• Always discharge static electricity by touching a grounded metal part before
mounting the Serial Communications Board.

• Always discharge static electricity by touching a grounded metal part before
connecting cable connectors to RS-232C or RS-422A/485 port of the Serial
Communications Board.

• Be sure that the connectors, terminal blocks, expansion cables, and other
items with locking devices are properly locked into place. Improper locking
may result in malfunction.

• 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 PC.

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

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

• 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.

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

5Conformance to EC Directives

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

• Confirm polarities before connecting RS-422A/485 cables. Some devices re­quire that SDA/B and RDA/B or signal polarities be reversed.

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

• Check the user programming (ladder program, protocol macro data, etc.) for
proper execution before actually running it on the Unit. Not checking the pro­gram may result in an unexpected operation.

• 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.

• Circuit boards have sharp or pointed edges, such as those on the leads of elec­trical parts. Do not touch the back of printed boards or mounted sections with
your bare hands.

• Connect or set terminating resistance correctly when using RS-422A/485
cables.

• During transportation and storage, cover the circuit boards with conductive
materials to prevent them from being damaged by static electricity caused by
LSIs or ICs and keep them within the specified storage temperature.

xiv

• Refer to Section 2 Board Components and Installation and correctly wire and
install the Units.

• Do not attempt to take any Units apart, to repair any Units, or to modify any
Units in any way.

• Disconnect the functional ground terminal when performing withstand voltage
tests. Not disconnecting the functional ground terminal may result in burning.

6 Conformance to EC Directives

6-1 Applicable Directives

• EMC Directives

• Low Voltage Directive

6-1-1 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 ma­chines. 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 in which the OMRON devices are installed. The cus­tomer must, therefore, perform final checks to confirm that devices and the over­all machine conform to EMC standards.

Note Applicable EMC (Electromagnetic Compatibility) standards are as follows:

6Conformance to EC Directives

EMS (Electromagnetic Susceptibility): EN61131-2
EMI (Electromagnetic Interference): EN50081-2

Low Voltage Directive

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

6-1-2 Conformance to EC Directives

The CQM1H-series PCs comply with EC Directives. T o ensure that the machine
or device in which a CQM1H-series PC is used complies with EC directives, the
PC must be installed as follows:

1, 2, 3... 1. The PC must be installed within a control panel.

2. Reinforced insulation or double insulation must be used for the DC power
supplies used for the I/O power supplies.

3. PCs complying with EC Directives also conform to the Common Emission
Standard (EN50081-2). When a PC is built into a machine, however, noise
can be generated by switching devices using relay outputs and cause the
overall machine to fail to meet the Standards. If this occurs, surge killers
must be connected or other measures taken external to the PC.

The following methods represent typical methods for reducing noise, and
may not be sufficient in all cases. Required countermeasures will vary
depending on the devices connected to the control panel, wiring, the config­uration of the system, and other conditions.

(Radiated emission: 10-m regulations)

6-1-3 EMI Measures

The CQM1H-series PCs conform to the Common Emission Standards
(EN50081-2) of the EMC Directives. However, the noise generated from Serial
Communications Board 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 PC.

xv

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.

6Conformance to EC Directives

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

Serial
Commu­nications
Board

xvi

SECTION 1

Introduction

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

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

1-1-1 Model Number 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

1-1-3 Features 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1-4 System Configuration 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1-5 Mounting Location 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2 Protocol Overview 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2-1 Host Link Mode 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2-2 Protocol Macros 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2-3 No-protocol Communications 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2-4 PC 1:1 Data Links 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2-5 NT Links –– 1:N Mode 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2-6 NT Links –– 1:1 Mode 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-3 Specifications 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-3-1 Serial Communications Board 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-3-2 General Specifications 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-4 Basic Operating Procedure 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1

1-1 Overview

1-1-1 Model Number

Name Model Specifications

Serial Communications Board CQM1H-SCB41 One RS-232 port

1-1-2 Serial Communications Boards

The Serial Communications Board is an Inner Board for the CQM1H-series PCs.
One Board can be installed in Inner Board slot 1 of a CQM1H-series CPU Unit.
The Board cannot be installed in slot 2.

The Board provides two serial communications ports for connecting host com­puters, Programmable Terminals (PTs), general-purpose external devices, and
Programming Devices (excluding Programming Consoles). This makes it pos­sible to easily increase the number of serial communications ports for a CQM1H­series PC.

1-1SectionBasic Operating Procedure

One RS-422A/485 port

1-1-3 Features

Port 1: RS-232C

Port 2: RS-422A/485

The Serial Communications Board is an option that can be mounted in the CPU
Unit to increase the number of serial ports without using an I/O slot. It supports
protocol macros (which are not supported by the ports built into the CPU Units),
allowing easy connection to general-purpose devices that have a serial port.

Inside controlled machine

Serial Communications Board

RS-232C

RS-422A/485

Temperature controller
or other device

Bar code reader
or other device

OR

Dedicated controller
or other device

External device with RS-232C or
RS-422A/485 port

Both RS-232C and RS-422A/485 ports are provided. The RS-422A/485 port en­ables 1:N connections to general-purpose external devices without going
through Converting Link Adapters. The 1:N connections can be used with proto­col macros or 1:N-mode NT Links.

2

1-1-4 System Configuration

The following serial communications modes are supported by the Serial Com­munications Board: Host Link (SYSMAC W AY), protocol macro, no-protocol, 1:1
Data Links, 1:N-mode NT Link, and 1:1-mode NT Link modes. The devices
shown in the following diagram can be connected.

Note The 1:1-mode NT Link and 1:N-mode NT Link communications modes use dif-

ferent protocols that are not compatible with each other.

General-purpose
external device

Programmable
Terminal (PT)

C-series PC

Programming
Device
(excluding
Programming
Console)

1-1SectionProtocol Overview

Host computer

Protocol macros

NT Link

1:1
Data Link

Host Link Host Link

No-protocol

RS-232C

CQM1H-series CPU Unit

Serial Communications Board

RS-422A/485

General-purpose
external device

Protocol macros

No-protocol

Programmable
Terminal (PT)

NT Link

C-series PC

1:1
Data Link

Programming
Device
(excluding
Programming
Console)

Host Link

Host computer

Host Link

Note An NT-AL001-E Converting Link Adapter can be used to convert between

RS-232C and RS-422A/485. This Link Adapter requires a 5-V power supply.
Power is provided by the RS-232C port on the Serial Communications Board
when the Link Adapter is connected to it, but must be provided separately when
connecting the Link Adapter to other devices.

3

1-1-5 Mounting Location

The Serial Communications Board can be installed in Inner Board slot 1 of a
CQM1H-series CPU Unit. The Board cannot be installed in slot 2.

Slot 2: Not mountable

Slot 1: Mount here

Serial Communications Board

1-2SectionBasic Operating Procedure

1-2 Protocol Overview

The following six serial communications modes can be used as required for
each serial communications port on the Serial Communications Board.

• Host Link:

For connections to host computers, personal computer peripheral devices, or
Programmable Terminals

• Protocol Macros:

For communications with general-purpose external devices using protocols

• No-protocol:

For connections to general-purpose devices for no-protocol communications
using TXD(––) and RXD(––) instructions

• 1:1 Data Links:

For 1:1 data links with a C-series PC, including another CQM1H

• 1:N-mode NT Link:

For communications with one or more Programmable Terminals (PTs)

• 1:1-mode NT Link:

For communications with one PT

Communications Ports and Serial Communications Modes

Board Port

Serial
Commu­nications
Boards

RS-232C
(port 1)

RS-422A/
485 (port 2)

Peripheral

bus or

Programming

Console bus

No OK OK OK OK OK (See

No OK (See

Host Link
(SYSMAC

WAY)

note 1)

Note 1. A 4-wire connection must be used when using Host Link, no-protocol, or 1:1

Data Link communications with an RS-422A/485 connector.

2. The PT Programming Control functions are not supported.

Connection examples for the serial communications modes are shown in the fol­lowing sections.

Serial communications mode

Protocol

macro

OK OK (See

No-

protocol

note 1)

1:1 Data

Link

OK (See
note 1)

1:N-mode

NT Link

note 2)
OK (See

note 2)

1:1-mode

NT Link

OK (See
note 2)

OK (See
note 2)

4

1-2-1 Host Link Mode

In Host Link Mode, C-mode Host Link commands can be sent from a computer,
PT, or other host to read or write I/O memory in the PC or to control the PC’s oper-
ating modes.

The TXD(––) instruction can be used to send ASCII data to the host. This is
called slave-initiated communications or unsolicited communications.

Note 1. Programming Devices can also be connected in Host Link mode.

2. A 4-wire connection must be used when using an RS-422A/485 port.

Sending C-mode Host Link Commands

Slave-initiated Communications

Host computer

Response

Host Link
command

Host computer

1-2SectionProtocol Overview

Serial Communications Board

TXD(––)

1-2-2 Protocol Macros

Data transfer procedures (called protocols) with general-purpose external de­vices can be created as macros using the CX-Protocol to match the communica­tions specifications of the external device (but, half-duplex communications and
start-stop synchronization must be used).

These protocols are stored in the Serial Communications Boards from the CX­Protocol, and enable data to be exchanged with general-purpose external de­vices simply by executing the PMCR(––) instruction in the CPU Unit.

Standard system protocols for exchanging data with OMRON devices (such as
Temperature Controllers, Intelligent Signal Processors, Bar Code Readers, and
Modems) are provided as a standard feature in the Serial Communications
Boards and the CX-Protocol. The CX-Protocol can also be used to change the
standard system protocols according to user requirements.

Data

CQM1H

Serial Communications Board

CQM1H

Message

PC initiates communication.

Serial Communications Board

PMCR
(––)

External device

RS-232C

Protocol made specifically for the
required communications specifications

with RS-232C port

Note There are some restrictions in using the CX-Protocol to manipulate protocols or

perform other operations for the CQM1H-series Serial Communications Board.
These restrictions are described below.

5

• Pin 8 on the DIP switch on the front of the CQM1H-series CPU Unit must be
turned ON t o use the CX-Protocol. While pin 8 is ON, you will not be able to use
any of the CPU Unit or Board ports for the CX-Programmer, SYSMAC-CPT , o r
SYSMAC Support Software.

• The model of PC must be set to the C200HG and the model of CPU Unit must
be set to the CPU43.

• Refer to 5-2 Restrictions in Using the CX-Protocol for further details.

1-2-3 No-protocol Communications

The TXD(––) and RXD(––) instructions can be used in the ladder program to
send and receive data without conversion through the RS-232C port to and from
an external device.

A start code can be sent before the data and an end code can be sent after it.
Alternately, the amount of data being sent can be specified. A communications
frame, however , cannot be created according to the specifications of the partner
device, providing less flexibility than protocol macros. Retry processing, data
form conversions, controlling processing based on a response, and other com­munications procedures cannot be performed.

1-2SectionBasic Operating Procedure

No-protocol communications are suitable for communications with bar code
readers and other devices that only send data or printers and other devices that
only receive data.

Note A 4-wire connection must be used when using an RS-422A/485 port.

1-2-4 PC 1:1 Data Links

Serial Communications Board

CQM1H

RS-232C

OR

TXD(––) or
RXD(––)

Data only

External device
with RS-232C port

Two PCs can be connected via RS-232C cable to create a data link between
them of u p t o 6 4 words in the LR area. The link words written by one PC are auto­matically transferred to the other PC for reading.

One of the following three ranges of words can be set to be linked:
LR 00 to LR 63, LR 00 to LR 31, or LR 00 to LR 15

A 1:1 Data Link communications system can be created between the CQM1H
and another CQM1H, or between the CQM1H and the CQM1, C200HX/HG/HE,
C200HS, CPM1, CPM1A, CPM2A, CPM2C, or SRM1(-V2).

6

Note A 4-wire connection must be used when using an RS-422A/485 port.

Serial Communications Board

1-2SectionProtocol Overview

1-2-5 NT Links –– 1:N Mode

A PC can be connected to one or more Programmable Terminals (PTs) using an
RS-232C or RS-422A/485 port. The I/O memory of the PC is allocated to the
Status Control Areas and the Status Notification Areas used by the PTs, as well
as to display objects, such as touch switches, lamps, and memory tables. This
enables the status of the I/O memory in the PC to be controlled and monitored by
operations from the PTs, without the use of a ladder diagram programming in the
PC. Up to eight PTs can be connected to a PC.

LR 00

to

LR 31
LR 32

to

LR 63

CQM1H

Master PC Slave PC

Master area
(sent)

Slave area
(received)

CQM1H or other C-series PC

RS-232C

LR 00

to

LR 31
LR 32

to

LR 63

Master area
(received)

Slave area
(sent)

Note The user does not need to be aware of NT Link commands. The user only has to

allocate the PC memory to the PTs.

1-2-6 NT Links –– 1:1 Mode

The functionality of the 1:1 mode is the same as that of the 1:N mode, but only a
1:1 connection is possible. The 1:1 and 1:N modes are not compatible as proto­cols.

Serial Communications Board

CQM1H

1:1

PT

Serial Communications Board

CQM1H

Serial Communications Board

CQM1H

1:N

RS-422A/485

PT

1:1

PT

PT

7

1-3 Specifications

1-3-1 Serial Communications Board

Device name Serial Communications Board
Model number CQM1H-SCB41
Classification CQM1H-series Inner Board
Supporting CPU Units CQM1H-CPU51/61
Number of mountable Boards/PC and

mounting location
Serial communications

ports
Protocols

Software interface with CPU Unit IR 200 to IR 207 (words for Inner Board slot 1)
PC Setup settings DM 6550 to DM 6559 (in read-only DM area in CPU Unit)

Current consumption (see note) 200 mA max. at 5 V DC
Dimensions 25 × 110 × 107 (mm) (W × H × D)
Weight 90 g max.
Standard accessories Socket: XM2SA-0901 (OMRON) (two included)

Port 1 RS-232C
Port 2 RS-422A/485
Port 1
Port 2

One Board per PC maximum, must be in Inner Board slot 1

Host Link, protocol macro, no-protocol, 1:1 Data Link, 1:N-mode NT Link
or 1:1-mode NT Link can be selected for each port.

Set from Programming Device

Hood: XM2SA-0911-E (OMRON) (two included, ESD compatible)

1-4SectionBasic Operating Procedure

Note The current consumption is for one Serial Communications Board. Power is sup-

plied from the CQM1H
When an NT-AL001-E Link Adapter is connected to the Serial Communications

Board, power is supplied to the Link Adapter from the Board. A current consump­tion of 150 mA must be added for each Link Adapter that is connected. In the
above specifications, “x” indicates that 150 mA must be added for each port to
which an NT-AL001-E Link Adapter is connected to provide the required 5-V
power supply.

1-3-2 General Specifications

Conform to SYSMAC CQM1H-series CPU Unit specifications.

1-4 Basic Operating Procedure

An overview of the basic operating procedure is provided here. Details are pro­vided in sections 4 to 8 of this manual according to the serial communications
mode.

1, 2, 3... 1. Turn OFF the power supply to the PC.

2. Mount the Board.

3. Connect the Board and the external device(s).

4. Turn ON the power supply to the PC.

5. Set the PC Setup settings from a Programming Device (e.g., Programming
Console or CX-Protocol).

6. Execute communications.
Use the control bits, flags, and words allocated in the IR area in the ladder

program to control communications.

8

SECTION 2

Board Components and Installation

This section describes the components of the Serial Communications Board, how to connect it in the CPU Unit, and how to
connect it to external devices.

2-1 Component Names and Functions 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1-1 Indicators 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1-2 RS-232C Port 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1-3 RS-422A/485 Port 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1-4 Switches 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2 Installation 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2-1 Mounting the Board 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2-2 External Dimensions 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2-3 Mounting Height and Connector Cover Dimensions 15. . . . . . . . . . . . . . . . . . . . . .

2-2-4 Precautions in Handling the Board 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-3 Wiring 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-3-1 Connectors 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-3-2 Wiring Precautions 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-3-3 Reducing Electrical Noise for External Wiring 18. . . . . . . . . . . . . . . . . . . . . . . . . . .

2-3-4 Port Applicability and Restrictions for 2-Wire/4-Wire Connections 19. . . . . . . . . . .

2-3-5 Recommended RS-232C Wiring Examples 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-3-6 Recommended RS-422A/485 Wiring Examples 21. . . . . . . . . . . . . . . . . . . . . . . . . .

2-3-7 Wiring Connectors 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-3-8 Soldering 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-3-9 Assembling Connector Hood 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-3-10 Connecting to the Board 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9

2-1 Component Names and Functions

The components of the Serial Communications Board are described in this sec­tion.

Serial Communications Board
(Inner Board slot 1)

Port 1:

RS-232C
Terminating resistance
switch

2-1SectionInstallation

Applicable Connectors
Socket: XM2SA-0901 (OMRON)
Hood: XM2SA-0911-E (OMRON)

(Two of each are included with the Board)

2-wire or 4-wire switch

2-1-1 Indicators

Board Indicators

RDY
COMM1
COMM2

Port 2:
RS-422A/485

There are three LED indicators on the Board, as described below.

RDY: Lit when the Board is operational (green)

COMM1: Lit when data is being sent or received on the RS-232C port (Yellow)
COMM2: Lit when data is being sent or received on the RS-442A/485 port (Yellow)

Indicator Color Status Meaning

RDY Green

COMM1 Yellow

COMM2 Yellow

Lit Operating normally, and protocol macro

preparations have been completed.

Flashing There is an error in the PC Setup settings for the

Board or in the protocol macros contained in the

Board.
Not lit A hardware error has occurred in the Board.
Flashing Port 1 is being used for sending or receiving.
Not lit Port 1 is not being used for sending or receiving.
Flashing Port 2 is being used for sending or receiving.
Not lit Port 2 is not being used for sending or receiving.

10

2-1SectionWiring

CPU Unit Indicators

A Serial Communications Board is mounted as an Inner Board in the CPU Unit
and thus affects the CPU Unit ERR/ALM indicator.

Indicator Color Status Meaning

ERR/ALM Red

Lit Fatal error If a fatal error occurs, the CPU

Unit will stop operation in
either RUN or MONITOR
mode.

Flashing Non-fatal

error

Not lit Normal

operation

If a non-fatal error occurs, the
CPU Unit will continue
operation in either RUN or
MONITOR mode.

The CPU Unit is operating
normally. This indicator will
also not be lit when a
watchdog timer error occurs.

If an error in the Inner Board is the cause of the error indicated on the ERR/ALM
indicator, the Inner Board Error Flag (SR 25415) will turn ON and information on
the error will be stored in AR 0400 to AR 0407. Refer to Section 9 Troubleshoot-
ing and Maintenance for details.

2-1-2 RS-232C Port

Protocol Host Link No-protocol Protocol macros 1:1 Data Links 1:N NT Links 1:1 NT Links

Communica­tions method

Synchroniza­tion

Baud rate 1,200/2,400/4,800/9,600/ 19,200 bps 19,200 bps 38,400 bps 19,200 bps
Connections 1:1

Transmission
distance

Interface Complies with EIA RS-232C

Half-duplex

Start-stop synchronization (asynchronous)

(1:N possible using Converting Link Adapters)

15 m max. (See note)

Note The maximum cable length for RS-232C is 15 m. The RS-232C standard, how-

ever, does not cover baud rates above 19.2 Kbps. Refer to the manual for the
device being connected to confirm support.

1:1 1:1

(1:N possible us­ing Link Adapters)

1:1

Connector Pin Layout

Pin No. Abbreviation Signal name I/O

1 (See note 1) FG Shield --­2 SD Send data Output
3 RD Receive data Input
4 RTS (RS) Request to send Output
5 CTS (CS) Clear to send Input
6 (See note 2) 5V Power supply --­7 DSR (DR) Data set ready Input
8 DTR (ER) Data terminal ready

(See note 4)
9 SG Signal ground --­Shell (See note 1) FG Shield ---

Output

Note 1. Pin No. 1 and the shell are connected to the ground terminal (GR) of the

Power Supply Unit inside the Serial Communications Board. Therefore, the
cable shield can be grounded by grounding GR of the Power Supply Unit.

2. Pin 6 (5 V) is required when the NT-AL001-E Link Adapter is connected. For
details on connection methods, refer to 2-3 Wiring.

11

Caution Do not connect the 5-V power supply of pin 6 to any external device other than an

!

NT-AL001-E Link Adapter. Otherwise, the external device and the Serial Com­munications Board may be damaged.

The following cables are provided for connection to NT-AL001-E Link Adapters.
We recommend that these cables be used.
NT-AL001-E connecting cables: XW2Z-070T-1 (0.7 m)

XW2Z-200T-1 (2 m)

2-1SectionInstallation

Applicable Connectors

Socket: XM2A-0901 (OMRON) or equivalent
Hood: XM2S-0911-E (OMRON, conforms to ESD) or equivalent
One Socket and one Hood are provided for each port.

Recommended Cables

UL2464 AWG28 5P IFS-RVV-SB (UL-approved, Fujikura Ltd.)
AWG28 5P IFVV-SB (not UL-approved, Fujikura Ltd.)

UL2464-SB (MA) 5P 28AWG (7/0.127) (UL-approved, Hitachi Cable, Ltd.)
CO-MA-VV -SB 5P 28AWG (7/0.127) (not UL-approved, Hitachi Cable, Ltd.)

Cable length: 15 m max.

2-1-3 RS-422A/485 Port

Protocol Host Link No-protocol Protocol macros 1:1 Data Links 1:N NT Links 1:1 NT Links

Communica­tions method

4-wire, 1:1 OK OK OK OK OK OK
4-wire, 1:N OK OK OK No OK No
2-wire, 1:1 No No OK No OK No
2-wire, 1:N No No OK No OK No
Synchroniza-

tion
Baud rate 1,200/2,400/4,800/9,600/ 19,200 bps 19,200 bps 38,400 bps 19,200 bps
Connections 1:N (N: 32 Units max.) 1:1 1:N (N: 8 Units

Transmission
distance

Interface Complies with EIA RS-485

Half-duplex

Start-stop synchronous (asynchronous)

1:1

max.)

500 m max.
(The total combined cable length is 500 m max. T-branch lines must be a maximum of 10 m long.)

Connector Pin Layout

12

Pin No. Abbreviation Signal name I/O

1 (See note 1) SDA Send data – Output
2 (See note 1) SDB Send data + Output
3 NC Not used --­4 NC Not used --­5 NC Not used --­6 (See note 1) RDA Receive data – Input
7 NC Not used --­8 (See note 1) RDB Receive data + Input
9 NC Not used --­Shell (See note 2) FG Shield ---

Note 1. When 2-wire connections are used, use pins 1 and 2, or pins 6 and 8.

2. The shell is connected to the ground terminal (GR) of the Power Supply Unit
inside of the Serial Communications Board. Therefore, the cable shield can
be grounded by grounding the GR of the Power Supply Unit.

2-1SectionWiring

Internal Circuits

Receiver

Driver

Caution Confirm polarities before connecting RS-422A/485 cables. Some devices re-

!

Applicable Connectors

The internal circuits for port 2 are shown below.

Pin 8: RDB (+)

Terminating resistance: 200 Ω
Terminating resistance switch

Pin 6: RDA (–)

2-wire/4-wire switch

Pin 2: SDB (+)
Pin 1: SDA (–)

quire that SDA/B and RDA/B or signal polarities be reversed.

Socket: XM2A-0901 (OMRON) or equivalent
Hood: XM2S-0911-E (OMRON, conforms to ESD) or equivalent
One Socket and one Hood are provided for each port.

Recommended Cables

2-1-4 Switches

Terminating Resistance
Switch

2-Wire or 4-Wire Switch

CO-HC-ESV-3P 7/0.2 (Hirakawa Hewtech Corp.)
Cable length: 500 m max.
(The total combined cable length is 500 m max. T -branch lines must be a maxi­mum of 10 m long.)

The TERM and WIRE switches are on the front panel of the Serial Communica­tions Board. Refer to page 10 for a diagram of the Board.

When an RS-422/485 port is used, turn ON the switch if the Serial Communica­tions Board is on the end of the transmission line. Refer to information on specific
serial communications modes for the ON/OFF settings.

Label Name Settings Factory setting

TERM Terminating

resistance switch

OFF:Terminating

resistance
OFF

ON: Terminating

resistance ON

OFF:Terminating

resistance
OFF

When an RS-422/485 port is used, set the switch to 2 when 2-wire connections
are used, and set the switch to 4 when 4-wire connections are used.

Label Name Settings Factory setting

WIRE 2-wire or 4-wire

switch

2: 2-wire
4: 4-wire

2: 2-wire

Note Host Link, no-protocol, and 1:1 Data Link modes cannot use 2-wire

RS-422A/485 communications. Always use 4-wire connections when using
RS-422A/485 communications for these serial communications modes. Refer
to 2-3 Wiring for connections.

13

2-2 Installation

2-2-1 Mounting the Board

This section describes how to mount a Serial Communications Board in Inner
Board slot 1 of a CPU Unit. Slot 1 is the slot on the left. Only one Serial Commu­nications Board can be installed in each CPU Unit.

Note 1. The Serial Communications Board cannot be mounted in Inner Board slot 2.

2. Always turn OFF the power before installing or removing the Serial Commu­nications Board. Installing or removing the Serial Communications Board
with the power ON can cause the CPU Unit to malfunction, damage internal
components, or cause communications errors.

3. Before handling the Serial Communications Board, touch a grounded me­tallic object in order to discharge any static build-up from your body.

1, 2, 3... 1. Press the catches at the top and bottom of the Inner Board slot 1 compart-

ment cover.

2-2SectionInstallation

Press the top catch. Press the bottom catch.

2. Remove the compartment cover.

Inner Board Connector

3. Insert the Serial Communications Board.

14

2-2-2 External Dimensions

CS1W-SCB41

110

2-2SectionWiring

Unit: mm

Mounted in the CPU Unit

10725

2-2-3 Mounting Height and Connector Cover Dimensions

When mounting the Serial Communications Board, make sure to provide space
for the mounting height and connector cover dimensions shown below.

Serial Communication Unit
mounted in the CPU Unit

Connecting Cable connector

123

223

Note The mounting heights shown above are applicable when the attached connec-

tors, connector covers, and recommended cables are used. The mounting
height may differ when other connectors, connector covers, and cables are
used. Determine the mounting height, taking into account the connectors, con­nector covers, and the minimum bending radius of the cables.

15

2-2-4 Precautions in Handling the Board

• Turn OFF the power supply to the CPU Unit before mounting or removing the
Board.

• Turn OFF the power supply to the CPU Unit before before connecting or dis­connecting Board connectors or wiring.

• Separate the port connector lines from the high-tension or power lines to re­duce external noise.

• Leave the port cover attached when not using a communications port.

2-2SectionInstallation

Port cover

16

2-3 Wiring

2-3-1 Connectors

2-3SectionWiring

Prepare connecting cables for port 1 (RS-232C) and port 2 (RS422A/485) using
the Sockets and Hoods provided with the Board and the recommended cables.

Connection methods vary with the serial communications mode that is being
used. Refer to the following sections for connection examples.

Host Link: Section 4 Host Link Communications
Protocol macros: Section 5 Protocol Macros
No-protocol: Section 6 Non-protocol Communications
1:1 Data Links: Section 7 Communications for 1:1 Data Links
NT Links: Section 8 NT Link Communications

Hood

Standard Connectors
(for Both RS-232C and
RS-422A/485)

Recommended Cables

Socket

Name Model Specifications

Socket XM2A-0901 9-pin male
Hood XM2S-0911-E For 9-pin, metric

screws, conforms
to ESD

Socket:
XM2A-0901

Hood:
XM2S-0911-E

RS-232C Cables

Model Manufacturer

UL2464 AWG28×5P IFS-RVV-SB (UL-approved)
AWG28×5P IFVV-SB (not UL-approved)

UL2464-SB (MA) 5P×AWG28 (7/0.127) (UL-approved)
CO-MA-VV-SB 5P×AWG28 (7/0.127) (not UL-approved)

Used together
(provided with
Serial
Communications
Board).

Fujikura Ltd.

Hitachi Cable, Ltd.

17

RS-422A/485 Cable

CO-HC-ESV-3P×7/0.2 Hirakawa Hewtech Corp.

Refer to pages 11 and 12 for the connector pin layouts. Refer to 2-3-5 Recom-

mended RS-232C Wiring Examples and 2-3-6 Recommended RS-422A/485
Wiring Examples for wiring examples, and to 2-3-7 Wiring Connectors for wiring

methods.
Standard cables are available for connection to personal computers and PTs.

Refer to Section 4 Host Link Communications for personal computer cables and
to your PT user’s manual for PT cables.

2-3-2 Wiring Precautions

• Before connecting or disconnecting the communications cables, always make
sure that the PC is turned OFF.

• Tighten the communications connector screws firmly with your fingers.

• Serial Communications Boards can be connected to various devices. For

compatibility, refer to the operation manuals for the devices to which they are to
be connected.

2-3SectionInstallation

Model Manufacturer

2-3-3 Reducing Electrical Noise for External Wiring

Observe the following precautions for external wiring.

• When multi-conductor signal cable is being used, avoid using I/O wires and
other control wires in the same cable.

• If wiring racks are running in parallel, allow at least 300 mm between the racks.

Low-current cables

Communications
cables

Control cables

PC power supply
and general control
circuit wiring

Power lines

• If the I/O wiring and power cables must be placed in the same duct, they must
be shielded from each other using grounded steel sheet metal.

PC power supply

Communications
cables

and general control
circuit wiring

Power cables

Ground to 100 Ω or less.

Power lines

300 mm min.

300 mm min.

Steel sheet metal

18

200 mm min.

Ground to 100 Ω or less.