Omron CRT1 - 10-2009 User manual

Cat. No. W457-E1-07
CompoNet Slave Units
and Repeater Unit
CRT1 Series
OPERATION MANUAL

CRT1 Series
CompoNet Slave Units
and Repeater Unit
Operation Manual
Revised October 2009

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v
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 dam-
age to property.
!DANGER Indicates an imminently hazardous situation which, if not avoided, will result in death or
serious injury. Additionally, there may be severe property damage.
!WARNING Indicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury. Additionally, there may be severe property damage.
!Caution Indicates a potentially hazardous situation which, if not avoided, may result in minor or
moderate injury, or property damage.
OMRON Product References
All OMRON products are capitalized in this manual. The word “Unit” is also capitalized when it refers to
an OMRON product, regardless of whether or not it appears in the proper name of the product.
The abbreviation “Ch,” which appears in some displays and on some OMRON products, often means
“word” and is abbreviated “Wd” in documentation in this sense.
The abbreviation “PLC” means Programmable Controller. “PC” is used, however, in some Program-
ming Device displays to mean Programmable Controller.
Visual Aids
The following headings appear in the left column of the manual to help you locate different types of
information.
Note Indicates information of particular interest for efficient and convenient opera-
tion of the product.
1,2,3... 1. Indicates lists of one sort or another, such as procedures, checklists, etc.
OMRON, 2006
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form, o
r
by any means, mechanical, electronic, photocopying, recording, or otherwise, without the prior written permission o
f
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.

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vii
TABLE OF CONTENTS
PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii
1 Intended Audience. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii
2 General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii
3 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii
4 Operating Environment Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xix
5 Application Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xx
6 Conformance to EC Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxii
SECTION 1
Features and Slave Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1-1 Features of CompoNet Slave Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1-2 Slave Unit Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
SECTION 2
Wiring Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
2-1 CompoNet Networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
2-2 Wiring Formations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
2-3 Communications Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
2-4 Communications Cable Wiring Examples. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
SECTION 3
Installation and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
3-1 Installing Slave Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
3-2 Connecting Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
3-3 Preparing Flat Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
3-4 Connecting Cables and Terminating Resistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
3-5 Power Supply Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
3-6 Connecting External I/O for Slave Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
SECTION 4
Basic Specifications of Slave Units . . . . . . . . . . . . . . . . . . . . 115
4-1 Basic Specifications of Slave Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
SECTION 5
Digital I/O Slave Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
5-1 Status Areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
5-2 Allocating I/O Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
5-3 Units with Screw Terminal Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
5-4 Units with Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
5-5 Units with Clamp Terminal Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 282

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TABLE OF CONTENTS
SECTION 6
Analog I/O Slave Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305
6-1 Analog I/O Slave Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306
6-2 Summary of the Analog Input Slave Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308
6-3 Summary of the Analog Output Slave Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 319
6-4 Status Areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322
6-5 Analog Data Monitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325
6-6 Units with Screw Terminal Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330
6-7 Units with Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337
SECTION 7
Temperature Input Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . 363
7-1 Temperature Input Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 364
7-2 Overview of Temperature Input Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 367
7-3 Status Areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 376
7-4 Monitoring Temperature Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 378
7-5 Temperature Input Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 382
SECTION 8
Expansion Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 391
8-1 Expansion Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 392
8-2 Expansion Unit Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 394
SECTION 9
Bit Slave Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 407
9-1 Status Areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 408
9-2 Allocating I/O Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 409
9-3 Bit Slave Units with e-CON Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 411
9-4 Clamp Terminal Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .432
9-5 Bit Slave Units with Compact Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 437
SECTION 10
Repeater Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 471
10-1 Status Areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 472
10-2 Repeater Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 474

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TABLE OF CONTENTS
SECTION 11
Smart Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 479
11-1 CX-Integrator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 481
11-2 Functions Common to All Slave Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 486
11-3 Functions of Digital I/O Slave Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 495
11-4 Analog I/O Slave Unit (input) Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 507
11-5 Analog I/O Slave Unit (output) Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 530
11-6 Temperature Input Unit Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 540
SECTION 12
Troubleshooting and Maintenance . . . . . . . . . . . . . . . . . . . . 579
12-1 Indicator Meanings and Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 580
12-2 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 581
12-3 Device Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 588
Appendices
A CompoNet Explicit Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 591
B Object Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 615
C Current Consumption Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 631
D Precautions with Connecting Two-wire DC Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 637
E I/O Power Supply Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 639
F Node Address Settings for Bit Slave Units with Compact Connectors . . . . . . . . . . . . . . . . 641
Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 645
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 649

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xi
About this Manual:
This manual describes the installation and operation of the CompoNet Slave Units, and the Repeater
Unit and includes the sections described below.
Please read this manual carefully and be sure you understand the information provided before
attempting to install or operate a CompoNet Slave Unit or Repeater Unit. Be sure to read the precau-
tions provided in the following section. Also be sure to read the CompoNet Master Unit Operation Man-
ual (see following table) together with this manual.
Precautions provide general precautions for using the CompoNet Slave Units, Repeater Units, Pro-
grammable Controller, and related devices.
Section 1 introduces the CompoNet Slave Units and the various models that are available.
Section 2 describes the configurations of CompoNet Networks.
Section 3 describes how to install and wire a CompoNet Network.
Section 4 provides the basic specifications of the Slave Units.
Section 5 describes the Digital I/O Slave Units.
Section 6 describes the Analog I/O Slave Units.
Section 7 describes the Temperature Input Units.
Section 8 describes the Expansion Units.
Section 9 describes the Bit Slave Units.
Section 10 describes the Repeater Unit.
Section 11 individually describes the functions provided by CompoNet Slave Unit. The functions are
divided into those supported by all CompoNet Slave Units and those supported only by specific Com-
poNet Slave Units.
Section 12 provides troubleshooting information that can be used in the event a problem occurs in
CompoNet Slave Unit operation. It also provides information on maintenance that should be performed
to ensure optimum application of the CompoNet Slave Units.
The Appendices provide specialized information, including information on CompoNet explicit mes-
sages, object mounting, connectable devices, current consumption, and precautions for connecting
two-wire DC sensors.
!WARNING Failure to read and understand the information provided in this manual may result in per-
sonal injury or death, damage to the product, or product failure. Please read each section
in its entirety and be sure you understand the information provided in the section and
related sections before attempting any of the procedures or operations given.

xii
Related Manuals:
Cat. No. Models Name Description
W457
(this manual)
CRT1 Series CompoNet Slave Units and
Repeater Unit Operation
Manual
Provides the specifications of CompoNet
Slave Units and Repeater Unit.
W456 CS1W-CRM21 and CJ1W-
CRM21
CS/CJ-series CompoNet
Master Units Operation
Manual
Provides an overview of CompoNet Networks,
communications specifications, wring meth-
ods, and CompoNet Master Unit functions.
W342 CS1G/H-CPU@@H
CS1G/H-CPU@@-EV1
CS1D-CPU@@H
CS1D-CPU@@S
CS1W-SCB@@-V1
CS1W-SCU@@-V1
CJ1G/H-CPU@@H
CJ1G-CPU@@P
CJ1G-CPU@@
CJ1M-CPU@@
CJ1W-SCU@@-V1
CP1H-X@@@@-@
CP1H-XA@@@@-@
CP1H-Y@@@@-@
NSJ@-@@@@(B)-G5D
NSJ@-@@@@(B)-M3D
SYSMAC CS/CJ/CP Series
SYSMAC One NSJ Series
Communications Com-
mands Reference Manual
Describes the communications commands
used with CS-series, CJ-series, and CP-
series PLCs and NSJ Controllers.
W464 CXONE-AL@@C-EV@/
CXONE-AL@@D-EV@
SYSMAC CS/CJ/CP/NSJ
Series CX-Integrator Ver.
2.3 Operation Manual
Describes CX-Integrator operating methods,
e.g., for setting up and monitoring networks.

xiii
Read and Understand this Manual
Please read and understand this manual before using the product. Please consult your OMRON
representative if you have any questions or comments.
Warranty and Limitations of Liability
WARRANTY
OMRON's exclusive warranty is that the products are free from defects in materials and workmanship for a
period of one year (or other period if specified) from date of sale by OMRON.
OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, REGARDING NON-
INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR PARTICULAR PURPOSE OF THE
PRODUCTS. ANY BUYER OR USER ACKNOWLEDGES THAT THE BUYER OR USER ALONE HAS
DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR
INTENDED USE. OMRON DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED.
LIMITATIONS OF LIABILITY
OMRON SHALL NOT BE RESPONSIBLE FOR SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES,
LOSS OF PROFITS OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS,
WHETHER SUCH CLAIM IS BASED ON CONTRACT, WARRANTY, NEGLIGENCE, OR STRICT
LIABILITY.
In no event shall the responsibility of OMRON for any act exceed the individual price of the product on which
liability is asserted.
IN NO EVENT SHALL OMRON BE RESPONSIBLE FOR WARRANTY, REPAIR, OR OTHER CLAIMS
REGARDING THE PRODUCTS UNLESS OMRON'S ANALYSIS CONFIRMS THAT THE PRODUCTS
WERE PROPERLY HANDLED, STORED, INSTALLED, AND MAINTAINED AND NOT SUBJECT TO
CONTAMINATION, ABUSE, MISUSE, OR INAPPROPRIATE MODIFICATION OR REPAIR.

xiv
Application Considerations
SUITABILITY FOR USE
OMRON shall not be responsible for conformity with any standards, codes, or regulations that apply to the
combination of products in the customer's application or use of the products.
At the customer's request, OMRON will provide applicable third party certification documents identifying
ratings and limitations of use that apply to the products. This information by itself is not sufficient for a
complete determination of the suitability of the products in combination with the end product, machine,
system, or other application or use.
The following are some examples of applications for which particular attention must be given. This is not
intended to be an exhaustive list of all possible uses of the products, nor is it intended to imply that the uses
listed may be suitable for the products:
• Outdoor use, uses involving potential chemical contamination or electrical interference, or conditions or
uses not described in this manual.
• Nuclear energy control systems, combustion systems, railroad systems, aviation systems, medical
equipment, amusement machines, vehicles, safety equipment, and installations subject to separate
industry or government regulations.
• Systems, machines, and equipment that could present a risk to life or property.
Please know and observe all prohibitions of use applicable to the products.
NEVER USE THE PRODUCTS FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR
PROPERTY WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO
ADDRESS THE RISKS, AND THAT THE OMRON PRODUCTS ARE PROPERLY RATED AND INSTALLED
FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM.
PROGRAMMABLE PRODUCTS
OMRON shall not be responsible for the user's programming of a programmable product, or any
consequence thereof.

xv
Disclaimers
CHANGE IN SPECIFICATIONS
Product specifications and accessories may be changed at any time based on improvements and other
reasons.
It is our practice to change model numbers when published ratings or features are changed, or when
significant construction changes are made. However, some specifications of the products may be changed
without any notice. When in doubt, special model numbers may be assigned to fix or establish key
specifications for your application on your request. Please consult with your OMRON representative at any
time to confirm actual specifications of purchased products.
DIMENSIONS AND WEIGHTS
Dimensions and weights are nominal and are not to be used for manufacturing purposes, even when
tolerances are shown.
PERFORMANCE DATA
Performance data given in this manual is provided as a guide for the user in determining suitability and does
not constitute a warranty. It may represent the result of OMRON's test conditions, and the users must
correlate it to actual application requirements. Actual performance is subject to the OMRON Warranty and
Limitations of Liability.
ERRORS AND OMISSIONS
The information in this manual has been carefully checked and is believed to be accurate; however, no
responsibility is assumed for clerical, typographical, or proofreading errors, or omissions.

xvi

xvii
PRECAUTIONS
This section provides general precautions for using the CompoNet Slave Units, and the Repeater Unit.
The information contained in this section is important for the safe and reliable application of the CompoNet Slave
Units and Repeater Unit. You must read this section and understand the information contained before attempting
to set up or operate a CompoNet Network using CompoNet Slave Units or Repeater Units.
1 Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii
2 General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii
3 Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii
4 Operating Environment Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xix
5 Application Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xx
6 Conformance to EC Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxii
6-1 Applicable Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxii
6-2 Concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxii
6-3 Conformance to EC Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxii

xviii
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. Be sure this manual is deliv-
ered to the persons actually using the CompoNet Slave Units and Repeater
Units.
!WARNING It is extremely important that a PLC and all PLC Units be used for the speci-
fied purpose and under the specified conditions, especially in applications that
can directly or indirectly affect human life. You must consult with your OMRON
representative before applying a PLC System to the above-mentioned appli-
cations.
3 Safety Precautions
!WARNING Do not attempt to take any Unit apart and do not touch the interior of any Unit
while the power is being supplied. Also, do not turn ON the power supply
while the cover is open. Doing any of these may result in electric shock.
!WARNING Do not input voltages or currents exceeding the rated range to the Unit.
Exceeding the rated range may cause Unit failure or fire.

xix
Operating Environment Precautions 4
!WARNING Provide safety measures in external circuits (i.e., not in the Slave Units),
including the following items, to ensure safety in the system if an abnormality
occurs due to malfunction of the PLC or another external factor affecting the
PLC operation. (“PLC” includes CPU Units, other Units mounted in the PLC,
and Remote I/O Terminals.) Not doing so may result in serious accidents.
• Emergency stop circuits, interlock circuits, limit circuits, and similar safety
measures must be provided in external control circuits.
• The PLC will turn OFF all outputs when its self-diagnosis function detects
any error or when a severe failure alarm (FALS) instruction is executed.
As a countermeasure for such errors, external safety measures must be
provided to ensure safety in the system.
• The PLC outputs may remain ON or OFF due to deposits on 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) 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.
!WARNING 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 PLC on a
network.
4 Operating Environment Precautions
!Caution 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 (including acids).
• Locations subject to shock or vibration.

xx
Application Precautions 5
!Caution The operating environment of the PLC System can have a large effect on the
longevity and reliability of the system. Improper operating environments can
lead to malfunction, failure, and other unforeseeable problems with the PLC
System. Make sure that the operating environment is within the specified con-
ditions at installation and remains within the specified conditions during the
life of the system.
5 Application Precautions
Observe the following precautions when using a CompoNet Network.
• When transporting the Unit, use special packing boxes and protect it from
being exposed to excessive vibration or impact during transportation.
• Do not drop any Unit or subject any Unit to excessive shock or vibration.
Otherwise, Unit failure or malfunction may occur.
• Mount the Units securely using DIN Track, a Mounting Bracket, or screws.
• Make sure that all Slave Unit mounting screws and cable connector
screws are tightened to the torque specified in the relevant manuals.
Incorrect tightening torque may result in malfunction.
• Make sure that the terminal blocks, communications cables, and other
items with locking devices are properly locked into place. Improper locking
may result in malfunction.
• When installing the Units, ground to 100 Ωmin.
• Wire all connections correctly according to instructions in the manual.
• Always separate Special Flat Cables (Standard and Sheathed) for differ-
ent CompoNet systems by at least 5 mm to prevent unstable operation
due to interference. Do not bundle Special Flat Cables.
• Do not extend connection distances or the number of connected nodes
beyond the ranges given in the specifications.
• Do not allow foreign matter to enter the Units when wiring and installing
the Units.
• Use the correct wiring materials to wire the Units.
• Use the correct tools to wire the Units.
• Always use the specified communications cables and connectors.
• Confirm the polarity of all terminals before wiring them.
• Make sure that all terminal block screws are tightened to the torque spec-
ified in this manuals. Incorrect tightening torque may result in fire, mal-
function, or failure.
• Always use the power supply voltage specified in this manual.
• Do not bend cables past their natural bending radius or pull on cables.
• Observe the following precautions when wiring the communications
cable.
• Separate the communications cables from the power lines or high-ten-
sion lines.
• Do not bend the communications cables past their natural bending ra-
dius.
• Do not pull on the communications cables.
• Do not place heavy objects on top of the communications cables.
• Always lay communications cable inside ducts.