Omron SYSMAC CS Series Owner's manual

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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 dam-
age to property.
'$1*(5 Indicates an imminently hazardous situation which, if not avoided, will result in death or
serious injury.
:$51,1* Indicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury.
&DXWLRQ Indicates a potentially hazardous situation which, if not avoided, may result in minor or
moderate injury, or property damage.
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All OMRON products are capitalized in this manual. The word “Unit” is also capitalized when it refers to
an OMRON product, regardless of whether or not it appears in the proper name of the product.
The abbreviation “Ch,” which appears in some displays and on some OMRON products, often means
“word” and is abbreviated “Wd” in documentation in this sense.
The abbreviation “PC” means Programmable Controller and is not used as an abbreviation for anything
else.
9LVXDO$LGV
The following headings appear in the left column of the manual to help you locate different types of
information.
Note Indicates information of particular interest for efficient and convenient opera-
tion of the product.
1,2,3...  ,QGLFDWHVOLVWVRIRQHVRUWRUDQRWKHUVXFKDVSURFHGXUHVFKHFNOLVWVHWF
OMRON, 2001
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 con-
stantly 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.

vi

vii
TABLE OF CONTENTS
PRECAUTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi
1 Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii
2 General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii
3 Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii
4 Operating Environment Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiv
5 Application Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xiv
6 Conformance to EC Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii
SECTION 1
CPU Unit Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1-1 Checking the Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1-2 Initial Setup (CS-series CPU Units Only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1-3 Using the Internal Clock (CS-series CPU Units Only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1-4 Internal Structure of the CPU Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1-5 Operating Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1-6 Programs and Tasks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1-7 Description of Tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
SECTION 2
Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2-1 Basic Concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2-2 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
2-3 Checking Programs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
SECTION 3
Instruction Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
3-1 Sequence Input Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
3-2 Sequence Output Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
3-3 Sequence Control Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
3-4 Timer and Counter Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
3-5 Comparison Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
3-6 Data Movement Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
3-7 Data Shift Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
3-8 Increment/Decrement Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
3-9 Symbol Math Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
3-10 Conversion Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
3-11 Logic Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
3-12 Special Math Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
3-13 Floating-point Math Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
3-14 Table Data Processing Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
3-15 Data Control Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
3-16 Subroutine Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
3-17 Interrupt Control Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
3-18 Step Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
3-19 Basic I/O Unit Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
3-20 Serial Communications Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
3-21 Network Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
3-22 File Memory Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
3-23 Display Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

viii
TABLE OF CONTENTS
3-24 Clock Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
3-25 Debugging Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
3-26 Failure Diagnosis Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .121
3-27 Other Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
3-28 Block Programming Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
3-29 Text String Processing Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
3-30 Task Control Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
SECTION 4
Tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
4-1 Task Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
4-2 Using Tasks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
4-3 Interrupt Tasks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
4-4 Programming Device Operations for Tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
SECTION 5
File Memory Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
5-1 File Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
5-2 Manipulating Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
5-3 Using File Memory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
SECTION 6
Advanced Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
6-1 Cycle Time/High-speed Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
6-2 Index Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212
6-3 Serial Communications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .221
6-4 Startup Settings and Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
6-5 Diagnostic Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234
6-6 Peripheral Servicing Priority Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238
6-7 Other Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
SECTION 7
Program Transfer, Trial Operation, and Debugging . . . . . 245
7-1 Program Transfer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246
7-2 Trial Operation and Debugging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246
Appendices
A PC Comparison Charts: CJ-series, CS-series, C200HG/HE/HX,
CQM1H, CVM1, and CV-series PCs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253
B Changes from Previous Host Link Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283

ix
$ERXWWKLV0DQXDO
This manual describes the programming of the CS1G/H-CPU##-EV1 and CJ1G-CPU## CPU Units
for CS/CJ-series Programmable Controllers (PCs) and includes the sections described on the follow-
ing page.
Please read this manual and all related manuals listed in the following table and be sure you under-
stand information provided before attempting to install or use CS1G/H-CPU##-EV1 or CJ1G-CPU##
CPU Units in a PC System.
Name Cat. No. Contents
SYSMAC CS/CJ Series
CS1G/H-CPU##-EV1
CJ1G-CPU##
Programmable Controllers
Programming Manual
W394 This manual describes programming and other
methods to use the functions of the CS/CJ-
series PCs. (This manual)
SYSMAC CJ Series
CJ1G-CPU##
Programmable Controllers
Operation Manual
W393 Provides an outlines of and describes the
design, installation, maintenance, and other
basic operations for the CJ-series PCs.
SYSMAC CS/CJ-series
CS1G/H-CPU##-EV1
CJ1G-CPU##
Programmable Controllers
Programming Manual
W340 Describes the ladder diagram programming
instructions supported by CS/CJ-series PCs.
SYSMAC CS/CJ-series
CQM1H-PRO01-E, C200H-PRO27-E,
CQM1-PRO01-E
Programming Consoles
Operation Manual
W341 Provides information on how to program and
operate CS/CJ-series PCs using a Program-
ming Console.
SYSMAC CS/CJ-series
CS1G/H-CPU##-EV1, CJ1G-CPU##,
CS1W-SCB21/41, CS1W-SCU21,
CJ1W-SCU41
Communications Commands
Reference Manual
W342 Describes the C-series (Host Link) and FINS
communications commands used with CS/CJ-
series PCs.
SYSMAC WS02-CXP##-E
CX-Programmer
User Manual
W361 Provide information on how to use the CX-Pro-
grammer, a programming device that supports
the CS/CJ-series PCs, and the CX-Net con-
tained within CX-Programmer.
SYSMAC WS02-CXP##-E
CX-Server
User Manual
W362
SYSMAC CS/CJ-series
CS1W-SCB21/41, CS1W-SCU21,
CJ1W-SCU41
Serial Communications Boards and
Serial Communications Units
Operation Manual
W336 Describes the use of Serial Communications
Unit and Boards to perform serial communica-
tions with external devices, including the usage
of standard system protocols for OMRON prod-
ucts.
SYSMAC WS02-PSTC1-E
CX-Protocol
Operation Manual
W344 Describes the use of the CX-Protocol to create
protocol macros as communications sequences
to communicate with external devices.
SYSMAC CS/CJ-series
CJ1W-ETN01/ENT11, CJ1W-ETN11
Ethernet Unit
Operation Manual
W343 Describes the installation and operation of
CJ1W-ETN01, CJ1W-ENT11, and CJ1W-
ETN11 Ethernet Units.

x
About this Manual, Continued
This manual contains the following sections.
Section 1 describes the basic structure and operation of the CPU Unit.
Section 2 describes basic information required to write, check, and input programs.
Section 3 outlines the instructions that can be used to write user programs.
Section 4 describes the operation of tasks.
Section 5 describes the functions used to manipulate file memory.
Section 6 provides details on advanced functions: Cycle time/high-speed processing, index registers,
serial communications, startup and maintenance, diagnostic and debugging, Programming Devices,
and CJ Basic I/O Unit input response time settings.
Section 7 describes the processes used to transfer the program to the CPU Unit and the functions that
can be used to test and debug the program.
The Appendices provide a comparison of CS/CJ-series, restrictions in using C200H Special I/O Units,
and changes made to Host Link Systems.
:$51,1* 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.

xi
PRECAUTIONS
This section provides general precautions for using the CS/CJ-series Programmable Controllers (PCs) and related devices.
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 PC system.
1 Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii
2 General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii
3 Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii
4 Operating Environment Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiv
5 Application Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiv
6 Conformance to EC Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii
6-1 Applicable Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii
6-2 Concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii
6-3 Conformance to EC Directives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii
6-4 Relay Output Noise Reduction Methods . . . . . . . . . . . . . . . . . . . . . xix

xii
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 specifica-
tions 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, amuse-
ment machines, safety equipment, and other systems, machines, and equip-
ment 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 man-
ual close at hand for reference during operation.
:$51,1* It is extremely important that a PC and all PC 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 PC System to the above-mentioned applica-
tions.
3 Safety Precautions
:$51,1* The CPU Unit refreshes I/O even when the program is stopped (i.e., even in
PROGRAM mode). Confirm safety thoroughly in advance before changing the
status of any part of memory allocated to I/O Units, Special I/O Units, or CPU
Bus Units. Any changes to the data allocated to any Unit may result in unex-
pected operation of the loads connected to the Unit. Any of the following oper-
ation 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.
:$51,1* Do not attempt to take any Unit apart while the power is being supplied. Doing
so may result in electric shock.

xiii
Safety Precautions 3
:$51,1* Do not touch any of the terminals or terminal blocks while the power is being
supplied. Doing so may result in electric shock.
:$51,1* Do not attempt to disassemble, repair, or modify any Units. Any attempt to do
so may result in malfunction, fire, or electric shock.
:$51,1* Do not touch the Power Supply Unit while power is being supplied or immedi-
ately after power has been turned OFF. Doing so may result in electric shock.
:$51,1* 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 PC or another external factor
affecting the PC 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 PC 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 PC outputs may remain ON or OFF due to deposition or burning of
the output relays or destruction of the output transistors. As a counter-
measure for such problems, external safety measures must be provided
to ensure safety in the system.
•When the 24-VDC output (service power supply to the PC) is overloaded
or short-circuited, the voltage may drop and result in the outputs being
turned OFF. As a countermeasure for such problems, external safety
measures must be provided to ensure safety in the system.
&DXWLRQ Confirm safety before transferring data files stored in the file memory (Mem-
ory Card or EM file memory) to the I/O area (CIO) of the CPU Unit using a
peripheral tool. Otherwise, the devices connected to the output unit may mal-
function regardless of the operation mode of the CPU Unit.
&DXWLRQ 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.
&DXWLRQ Confirm safety at the destination node before transferring a program to
another node or changing contents of the I/O memory area. Doing either of
these without confirming safety may result in injury.
&DXWLRQ Tighten the screws on the terminal block of the AC Power Supply Unit to the
torque specified in the operation manual. The loose screws may result in
burning or malfunction.

xiv
Operating Environment Precautions 4
4 Operating Environment Precautions
&DXWLRQ Do not operate the control system in the following locations:
•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 tem-
perature.
•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.
&DXWLRQ 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.
&DXWLRQ The operating environment of the PC 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 PC
System. Be sure that the operating environment is within the specified condi-
tions 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 System.
•You must use the CX-Programmer (programming software that runs on
Windows) if you need to program more than one task. A Programming
Console can be used to program only one cyclic task plus interrupt tasks.
A Programming Console can, however, be used to edit multitask pro-
grams originally created with the CX-Programmer.
•There are restrictions in the areas and addresses that can be accessed in
I/O memory of the CS-series CS1 CPU Units when using the C200H Spe-
cial I/O Units in combination with the following functions.
•There are restrictions in data transfer with the CPU Unit when pro-
gramming transfers inside an ASCII Unit using the PC READ, PC
WRITE, and similar commands.
•There are restrictions in data transfer with the CPU Unit for allocated
bits and DM area specifications (areas and addresses for source and
destination specifications).
•The DeviceNet (CompoBus/D) output area for a DeviceNet (Compo-
Bus/D) Master Unit (CIO 0050 to CIO 0099) overlaps with the I/O bit
area (CIO 0000 to CIO 0319). Do not use automatic allocations for I/O
in any system where allocations to the DeviceNet system will overlap

xv
Application Precautions 5
with allocations to I/O Units. Instead, use a Programming Device or the
CX-Programmer to manually allocate I/O for the DeviceNet devices,
being sure that the same words and bits are not allocated more than
once, and transfer the resulting I/O table to the CPU Unit. If DeviceNet
communications are attempted when the same bits are allocated to
both DeviceNet devices and I/O Units (which can occur even if auto-
matic allocation is used), the DeviceNet devices and I/O Units may
both exhibit faulty operation.
•Special bits and flags for PC Link Units (CIO 0247 to CIO 0250) over-
lap with the I/O bit area (CIO 0000 to CIO 0319). Do not use automatic
allocations for I/O in any system where allocations to the I/O Units will
overlap with allocations to I/O Units. Instead, use a Programming De-
vice or the CX-Programmer to manually allocate I/O to I/O Units, being
sure that the special bits and flags for PC Link Units are not used, and
transfer the resulting I/O table to the CPU Unit. If operation is attempt-
ed when the special bits and flags for PC Link Units are also allocated
to I/O Units (which can occur even if automatic allocation is used), the
PC Link Units and I/O Units may both exhibit faulty operation.
:$51,1* 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 Ωor less when installing the Units. Not
connecting to a ground of 100 Ω or less may result in electric shock.
•A ground of 100 Ωor less must be installed when shorting the GR and LG
terminals on the Power Supply Unit.
•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.
•Mounting or dismounting Power Supply Units, I/O Units, CPU Units,
Inner Boards, or any other Units.
•Assembling the Units.
•Setting DIP switches or rotary switches.
•Connecting cables or wiring the system.
•Connecting or disconnecting the connectors.
&DXWLRQ Failure to abide by the following precautions could lead to faulty operation of
the PC or the system, or could damage the PC or PC Units. Always heed
these precautions.
•A CJ-series CPU Unit is shipped with the battery installed and the time
already set on the internal clock. It is not necessary to clear memory or
set the clock before application, as it is for the CS-series CS1 CPU Units.
•When using a CS-series CS1 CPU Unit for the first time, install the CJ1W-
BAT1 Battery provided with the Unit and clear all memory areas from a
Programming Device before starting to program. When using the internal
clock, turn ON power after installing the battery and set the clock from a
Programming Device or using the DATE(735) instruction. The clock will
not start until the time has been set.
•When creating an AUTOEXEC.IOM file from a Programming Device (a
Programming Console or the CX-Programmer) to automatically transfer
data at startup, set the first write address to D20000 and be sure that the

xvi
Application Precautions 5
size of data written does not exceed the size of the DM Area. When the
data file is read from the Memory Card at startup, data will be written in
the CPU Unit starting at D20000 even if another address was set when
the AUTOEXEC.IOM file was created. Also, if the DM Area is exceeded
(which is possible when the CX-Programmer is used), the remaining data
will be written to the EM Area.
•Always turn ON power to the PC before turning ON power to the control
system. If the PC power supply is turned ON after the control power sup-
ply, temporary errors may result in control system signals because the
output terminals on DC Output Units and other Units will momentarily turn
ON when power is turned ON to the PC.
•Fail-safe measures must be taken by the customer to ensure safety in the
event that outputs from Output Units remain ON as a result of internal cir-
cuit failures, which can occur in relays, transistors, and other elements.
•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.
•Interlock circuits, limit circuits, and similar safety measures in external cir-
cuits (i.e., not in the Programmable Controller) must be provided by the
customer.
•Do not turn OFF the power supply to the PC when data is being trans-
ferred. In particular, do not turn OFF the power supply when reading or
writing a Memory Card. Also, do not remove the Memory Card when the
BUSY indicator is lit. To remove a Memory Card, first press the memory
card power supply switch and then wait for the BUSY indicator to go out
before removing the Memory Card.
•If the I/O Hold Bit is turned ON, the outputs from the PC will not be turned
OFF and will maintain their previous status when the PC is switched from
RUN or MONITOR mode to PROGRAM mode. Make sure that the exter-
nal loads will not produce dangerous conditions when this occurs. (When
operation stops for a fatal error, including those produced with the
FALS(007) instruction, all outputs from Output Unit will be turned OFF
and only the internal output status will be maintained.)
•When supplying power at 200 to 240 VAC with a CS-series PC, always
remove the metal jumper from the voltage selector terminals. The product
will be destroyed if 200 to 240 VAC is supplied while the metal jumper is
attached.
•Always use the power supply voltages specified in the operation manuals.
An incorrect voltage may result in malfunction or burning.
•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.
•Install external breakers and take other safety measures against short-cir-
cuiting in external wiring. Insufficient safety measures against short-cir-
cuiting may result in burning.
•Do not apply voltages to the Input Units in excess of the rated input volt-
age. Excess voltages may result in burning.
•Do not apply voltages or connect loads to the Output Units in excess of
the maximum switching capacity. Excess voltage or loads may result in
burning.

xvii
Application Precautions 5
•Disconnect the functional ground terminal when performing withstand
voltage tests. Not disconnecting the functional ground terminal may result
in burning.
•Install the Units properly as specified in the operation manuals. Improper
installation of the Units may result in malfunction.
•With CS-series PCs, be sure that all the Unit and Backplane mounting
screws are tightened to the torque specified in the relevant manuals.
Incorrect tightening torque may result in malfunction.
•Be sure that all terminal screws, and cable connector screws are tight-
ened to the torque specified in the relevant manuals. Incorrect tightening
torque 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.
•Remove the label after the completion of wiring to ensure proper heat dis-
sipation. Leaving the label attached may result in malfunction.
•Use crimp terminals for wiring. Do not connect bare stranded wires
directly to terminals. Connection of bare stranded wires may result in
burning.
•Wire all connections correctly.
•Double-check all wiring and switch settings before turning ON the power
supply. Incorrect wiring may result in burning.
•Mount Units only after checking terminal blocks and connectors com-
pletely.
•Be sure that the terminal blocks, Memory Units, expansion cables, and
other items with locking devices are properly locked into place. Improper
locking may result in malfunction.
•Check switch settings, the contents of the DM Area, and other prepara-
tions before starting operation. Starting operation without the proper set-
tings or data may result in an unexpected operation.
•Check the user program for proper execution before actually running it on
the Unit. Not checking the program may result in an unexpected opera-
tion.
•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.
•Resume operation only after transferring to the new CPU Unit the con-
tents of the DM Area, HR Area, and other data required for resuming
operation. Not doing so may result in an unexpected operation.
•Do not pull on the cables or bend the cables beyond their natural limit.
Doing either of these may break the cables.
•Do not place objects on top of the cables or other wiring lines. Doing so
may break the cables.
•When replacing parts, be sure to confirm that the rating of a new part is
correct. Not doing so may result in malfunction or burning.
•Before touching a Unit, be sure to first touch a grounded metallic object in
order to discharge any static build-up. Not doing so may result in malfunc-
tion or damage.

xviii
Conformance to EC Directives 6
•When transporting or storing circuit boards, cover them in antistatic mate-
rial to protect them from static electricity and maintain the proper storage
temperature.
•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.
•Do not short the battery terminals or charge, disassemble, heat, or incin-
erate the battery. Do not subject the battery to strong shocks. Doing any
of these may result in leakage, rupture, heat generation, or ignition of the
battery. Dispose of any battery that has been dropped on the floor or oth-
erwise subjected to excessive shock. Batteries that have been subjected
to shock may leak if they are used.
•UL standards required that batteries be replaced only by experienced
technicians. Do not allow unqualified persons to replace batteries.
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
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 Direc-
tives 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 EMC (Electromagnetic Compatibility) standards are as follows:
EMS (Electromagnetic Susceptibility): CS Series: EN61131-2
CJ Series: EN61000-6-2
EMI (Electromagnetic Interference): EN50081-2
(Radiated emission: 10-m regulations)
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 PC (EN61131-2).
6-3 Conformance to EC Directives
The CS/CJ-series PCs comply with EC Directives. To ensure that the
machine or device in which the CS/CJ-series PC is used complies with EC
Directives, the PC must be installed as follows:
1,2,3... 1. The CS/CJ-series PC must be installed within a control panel.

xix
Conformance to EC Directives 6
2. You must use reinforced insulation or double insulation for the DC power
supplies used for the communications power supply and I/O power sup-
plies.
3. CS/CJ-series PCs complying with EC Directives also conform to the Com-
mon Emission Standard (EN50081-2). 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 equip-
ment complies with EC Directives.
6-4 Relay Output Noise Reduction Methods
The CS/CJ-series PCs conforms to the Common Emission Standards
(EN50081-2) of the EMC Directives. However, noise generated by relay out-
put switching may not satisfy these Standards. In such a case, a noise filter
must be connected to the load side or other appropriate countermeasures
must be provided external to the PC.
Countermeasures taken to satisfy the standards vary depending on the
devices on the load side, wiring, configuration of machines, etc. Following are
examples of countermeasures for reducing the generated noise.
Countermeasures (Refer to EN50081-2 for more details.)
Countermeasures are not required if the frequency of load switching for the
whole system with the PC included is less than 5 times per minute.
Countermeasures are required if the frequency of load switching for the whole
system with the PC included is more than 5 times per minute.
Countermeasure Examples
When switching an inductive load, connect an surge protector, diodes, etc., in
parallel with the load or contact as shown below.

xx
Conformance to EC Directives 6
Circuit Current Characteristic Required element
AC DC
Yes Yes If the load is a relay or solenoid, there is
a time lag between the moment the cir-
cuit is opened and the moment the load
is reset.
If the supply voltage is 24 or 48 V, insert
the surge protector in parallel with the
load. If the supply voltage is 100 to
200 V, insert the surge protector
between the contacts.
The capacitance of the capacitor must
be 1 to 0.5 µF per contact current of
1 A and resistance of the resistor must
be 0.5 to 1 Ωper contact voltage of 1 V.
These values, however, vary with the
load and the characteristics of the
relay. Decide these values from experi-
ments, and take into consideration that
the capacitance suppresses spark dis-
charge when the contacts are sepa-
rated and the resistance limits the
current that flows into the load when
the circuit is closed again.
The dielectric strength of the capacitor
must be 200 to 300 V. If the circuit is an
AC circuit, use a capacitor with no
polarity.
No Yes The diode connected in parallel with
the load changes energy accumulated
by the coil into a current, which then
flowsinto the coil so that the current will
be converted into Joule heat by the
resistance of the inductive load.
This time lag, between the moment the
circuit is opened and the moment the
load is reset, caused by this method is
longer than that caused by the CR
method.
The reversed dielectric strength value
of the diode must be at least 10 times
as large as the circuit voltage value.
The forward current of the diode must
be the same as or larger than the load
current.
The reversed dielectric strength value
of the diode may be two to three times
larger than the supply voltage if the
surge protector is applied to electronic
circuits with low circuit voltages.
Yes Yes The varistor method prevents the impo-
sition of high voltage between the con-
tacts by using the constant voltage
characteristic of the varistor. There is
time lag between the moment the cir-
cuit is opened and the moment the load
is reset.
If the supply voltage is 24 or 48 V, insert
the varistor in parallel with the load. If
the supply voltage is 100 to 200 V,
insert the varistor between the con-
tacts.
---
CR method
Power
supply
Inductive load
C
R
Diode method
Power
supply
Inductive load
Varistor method
Power
supply
Inductive load

xxi
Conformance to EC Directives 6
When switching a load with a high inrush current such as an incandescent
lamp, suppress the inrush current as shown below.
OUT
COM ROUT COM
R
C
ountermeasure 1
P
roviding a dark current of
a
pprox.one-third of the rated
v
alue through an incandescent
Countermeasure 2
Providing a limiting resistor
amp