Omron CPM1 - PROGRAMING 02-2001 Owner's manual

Programmable Controllers
Cat. No. W353-E1-06
SYSMAC
CPM1/CPM1A/CPM2A/CPM2C/SRM1(-V2)
PROGRAMMING MANUAL

CPM1/CPM1A/CPM2A/CPM2C/SRM1(-V2)
Programmable Controllers
Programming Manual
Revised February 2008

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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.
WARNING Indicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury.
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 “PC” means Programmable Controller and is not used as an abbreviation for any-
thing else.
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 operation
of the product.
1, 2, 3... 1. Indicates lists of one sort or another, such as procedures, checklists, etc.
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 permis-
sion 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 informa-
tion contained in this publication.

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TABLE OF CONTENTS
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PRECAUTIONS xvii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 Intended Audience xviii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 General Precautions xviii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Safety Precautions xviii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Operating Environment Precautions xx. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Application Precautions xxi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 1
PC Setup 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1 PC Setup 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2 Basic PC Operation and I/O Processes 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-3 CPM2C Changes in SW2 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 2
Special Features 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1 CPM2A/CPM2C Interrupt Functions 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2 CPM2A/CPM2C High-speed Counters 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-3 CPM1/CPM1A Interrupt Functions 77. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-4 SRM1(-V2) Interrupt Functions 94. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-5 CPM2A/CPM2C Pulse Output Functions 97. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-6 CPM1A Pulse Output Functions 131. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-7 Synchronized Pulse Control (CPM2A/CPM2C Only) 134. . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-8 Data Computation Standards 146. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-9 Analog I/O Functions (CPM1/CPM1A/CPM2A/CPM2C Only) 147. . . . . . . . . . . . . . . . . . . .
2-10 Temperature Sensor Input Functions (CPM1A/CPM2A/CPM2C Only) 147. . . . . . . . . . . . . .
2-11 CompoBus/S I/O Slave Functions (CPM1A/CPM2A/CPM2C Only) 147. . . . . . . . . . . . . . . .
2-12 CompoBus/S I/O Master Functions (SRM1(-V2) and CPM2C-S Only) 148. . . . . . . . . . . . . .
2-13 Analog Controls (CPM1/CPM1A/CPM2A Only) 150. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-14 Quick-response Inputs 153. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-15 Macro Function 157. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-16 Calculating with Signed Binary Data 158. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-17 Differential Monitor 159. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-18 Expansion Instructions (CPM2A/CPM2C/SRM1(-V2) Only) 160. . . . . . . . . . . . . . . . . . . . . .
2-19 Using the CPM2A/CPM2C Clock Function 163. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 3
Using Expansion Units 165. . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-1 Analog I/O Units 166. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-2 Temperature Sensor Units 193. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-3 CompoBus/S I/O Link Units 214. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-4 DeviceNet I/O Link Unit 219. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 4
Communications Functions 225. . . . . . . . . . . . . . . . . . . . . . . .
4-1 Introduction 226. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-2 CPM1/CPM1A Communications Functions 227. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-3 CPM2A/CPM2C Communications Functions 231. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-4 SRM1(-V2) Communications Functions 268. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-5 Host Link Commands 281. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 5
Memory Areas 307. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-1 Memory Area Functions 308. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-2 I/O Allocation for CPM1/CPM1A/CPM2A PCs 313. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-3 I/O Allocation for CPM2C PCs 323. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

viii
SECTION 6
Ladder-diagram Programming 333. . . . . . . . . . . . . . . . . . . .
6-1 Basic Procedure 334. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-2 Instruction Terminology 334. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-3 Basic Ladder Diagrams 335. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-4 Controlling Bit Status 354. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-5 Work Bits (Internal Relays) 356. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-6 Programming Precautions 358. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-7 Program Execution 360. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 7
Instruction Set 361. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-1 Notation 364. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-2 Instruction Format 364. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-3 Data Areas, Definer Values, and Flags 364. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-4 Differentiated Instructions 366. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-5 Coding Right-hand Instructions 367. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-6 Instruction Tables 370. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-7 Ladder Diagram Instructions 376. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-8 Bit Control Instructions 377. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-9 NO OPERATION – NOP(00) 381. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-10 END – END(01) 381. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-11 INTERLOCK and INTERLOCK CLEAR – IL(02) and ILC(03) 381. . . . . . . . . . . . . . . . . . .
7-12 JUMP and JUMP END – JMP(04) and JME(05) 383. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-13 User Error Instructions:
FAILURE ALARM AND RESET – FAL(06) and
SEVERE FAILURE ALARM – FALS(07) 385. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-14 Step Instructions:
STEP DEFINE and STEP START–STEP(08)/SNXT(09) 385. . . . . . . . . . . . . . . . . . . . . . . . .
7-15 Timer and Counter Instructions 388. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-16 Shift Instructions 404. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-17 Data Movement Instructions 411. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-18 Data Control Instructions 421. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-19 Comparison Instructions 432. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-20 Conversion Instructions 439. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-21 BCD Calculation Instructions 457. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-22 Binary Calculation Instructions 467. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-23 Special Math Instructions 471. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-24 Logic Instructions 479. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-25 Increment/Decrement Instructions 483. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-26 Subroutine Instructions 484. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-27 Pulse Output Instructions 487. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-28 Special Instructions 497. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-29 Interrupt Control Instructions 501. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-30 Communications Instructions 505. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 8
PC Operations and Processing Time 511. . . . . . . . . . . . . . . .
8-1 CPM1/CPM1A Cycle Time and I/O Response Time 512. . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-2 CPM2A/CPM2C Cycle Time and I/O Response Time 523. . . . . . . . . . . . . . . . . . . . . . . . . . .
8-3 SRM1(-V2) Cycle Time and I/O Response Time 537. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TABLE OF CONTENTS
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SECTION 9
Troubleshooting 549. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9-1 Introduction 550. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9-2 Programming Console Operation Errors 550. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9-3 Programming Errors 551. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9-4 User-defined Errors 552. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9-5 Operating Errors 553. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9-6 Error Log 555. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9-7 Host Link Errors 557. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9-8 Troubleshooting Flowcharts 557. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendices
A Programming Instructions 559. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B Error and Arithmetic Flag Operation 565. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C Memory Areas 569. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D I/O Assignment Sheet 587. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
E Program Coding Sheet 589. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F List of FAL Numbers 593. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G Extended ASCII 595. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Index 597. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Revision History 603. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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xi
About this Manual:
This manual provides information on programming the CPM1, CPM1A, CPM2A, CPM2C (including the
CPM2C-S), and SRM1(-V2) PCs. The following manuals describe the system configurations and installa-
tion of the PCs and provide a basic explanation of operating procedures for the Programming Consoles.
Read the relevant manual first to acquaint yourself with the PC.
Manual Catalog No.
CPM1 Operation Manual W262
CPM1A Operation Manual W317
CPM2A Operation Manual W352
CPM2C Operation Manual W356
CPM2C-S Operation Manual W377
SRM1(-V2) Operation Manual W318
Note 1. Version 2 (-V2) of the SRM1 is included beginning with following revision of the manual:
W318-E1-3.
2. Refer to sections on the CPM2C for information on CPM2C instructions and Expansion
Units.
For programming the CPM1, CPM1A, CPM2A, CPM2C (including the CPM2C-S), and SRM1(-V2) PCs,
use the CX-Programmer, special Support Software that runs in a Windows environment. The SYSMAC
Support Software and SYSMAC-CPT Support Software can also be used. Please refer to the relevant
manuals listed in the following table when using any one of Support Software.
Name Model No. Manual Catalog
No.
CX-Programmer version 3.1 WS02-CXPC1-EV3 CX-Programmer Operation Manual W414
CX-Programmer version 4.0 WS02-CXPC1-EV4
gp
W425
SYSMAC Support Software C500-ZL3AT1-E SYSMAC Support Software
Operation Manual: Basic
W247
SYSMAC Support Software
Operation Manual: C-series PCs
W248
SYSMAC-CPT Support Software WS02-CPTB1-E SYSMAC-CPT Support Software Quick
Start Guide
W332
SYSMAC-CPT Support Software
User Manual
W333
Please read this manual carefully and be sure you understand the information provided before attempting
to program or operate the PC.
Section 1 explains the PC Setup. The PC Setup can be used to control the operating parameters.
Section 2 explains special features of the PC.
Section 3 describes how to use the CPM1A-MAD01 and CPM2C-MAD11 Analog I/O Units, the CPM1A-
TS and CPM2C-TS Temperature Sensor Units, and the CPM1A-SRT21 and CPM2C-SRT21
CompoBus/S I/O Link Units.
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.
!

xii
About this Manual, Continued
Section 4 describes how to use the communications functions provided in the PCs.
Section 5 describes the structure of the PC memory areas and explains how to use them. Details of some
areas are provided in Appendix C.
Section 6 explains the basic steps and concepts involved in writing a basic ladder diagram program. It
introduces the instructions that are used to build the basic structure of the ladder diagram and control its
execution.
Section 7 explains instructions individually and provides the ladder diagram symbol, data areas, and
flags used with each.
Section 8 explains the internal PC processing, as well as the time required for processing and execution.
Section 9 describes how to diagnose and correct hardware and software errors that can occur during
operation.
Various Appendices are also provided for easy reference. Refer to the table of contents for a list of ap-
pendices.

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
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WARRANTY
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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.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
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LIMITATIONS OF LIABILITY
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
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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
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SUITABILITY FOR USE
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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.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
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PROGRAMMABLE PRODUCTS
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
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OMRON shall not be responsible for the user’s programming of a programmable product, or any
consequence thereof.

xv
Disclaimers
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CHANGE IN SPECIFICATIONS
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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.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
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DIMENSIONS AND WEIGHTS
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
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Dimensions and weights are nominal and are not to be used for manufacturing purposes, even when
tolerances are shown.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
PERFORMANCE DATA
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
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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.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
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ERRORS AND OMISSIONS
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
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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 Programmable Controller (PC) and related devices.
The information contained in this section is important for the safe and reliable application of the Programmable Con-
troller. You must read this section and understand the information contained before attempting to set up or operate a
PC system.
1 Intended Audience xviii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 General Precautions xviii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Safety Precautions xviii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Operating Environment Precautions xx. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Application Precautions xxi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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4Safety Precautions
xviii
1 Intended Audience
This manual is intended for the following personnel, who must also have knowl-
edge 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 ma-
chines, safety equipment, and other systems, machines, and equipment that
may have a serious influence on lives and property if used improperly, consult
your OMRON representative.
Make sure that the ratings and performance characteristics of the product are
sufficient for the systems, machines, and equipment, and be sure to provide the
systems, machines, and equipment with double safety mechanisms.
This manual provides information for programming and operating the Unit. Be
sure to read this manual before attempting to use the Unit and keep this manual
close at hand for reference during operation.
WARNING It is extremely important that a 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
applications.
3 Safety Precautions
WARNING Do not attempt to take any Unit apart while the power is being supplied. Doing so
may result in electric shock.
WARNING Do not attempt to disassemble, repair, or modify any Units. Any attempt to do so
may result in malfunction, fire, or electric shock.
WARNING 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.
•Mounting or dismounting I/O Units, CPU Units, or any other Units.
•Connecting or wiring the cables.
•Connecting or disconnecting the connectors.
•Setting DIP switches.
•Replacing the battery
WARNING Do not touch any of the terminals or terminal blocks while the power is being
supplied. Doing so may result in electric shock.

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3Safety Precautions
xix
WARNING Always ground the system to 100 Ωor less when installing the Units. Not
connecting to a ground of 100 Ωor less may result in electric shock.
WARNING Provide safety measures in external circuits (i.e., not in the Programmable
Controller), including the following items, to ensure safety in the system if an
abnormality occurs due to malfunction of the 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 coun-
termeasure for such errors, external safety measures must be provided to en-
sure 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 countermeasure 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.
WARNING When handling the Memory Backup Battery, never drop, disassemble, distort,
short-circuit, recharge, heat to a temperature exceeding 100°C, or throw into
fire. The Battery may explode, catch fire, or leak fluid if mishandled in any of
these ways.
Caution Execute online edit only after confirming that no adverse effects will be caused
by extending the cycle time. Otherwise, input signals may not be readable.
Caution When transferring programs to other nodes, or when making changes to I/O
memory, confirm the safety of the destination node before transfer. Not doing so
may result in injury.
Caution 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 fire or
malfunction.
Caution When connecting the PC to a personal computer or other peripheral device,
either ground the 0-V side of the PC or do not ground the PC at all. Although
some grounding methods short the 24-V side, as shown in the following dia-
gram, never do so with the PC.
INCORRECT Grounding: Shorting the 24-V side of the Power Supply
24 V
0 V 0 V 0 V
PC Peripheral device
Non-isolated DC
power supply

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4Operating Environment Precautions
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4 Operating Environment Precautions
Caution Do not operate the control system in the following places:
•Locations subject to direct sunlight.
•Locations subject to temperatures or humidity outside the range specified in
the specifications.
•Locations subject to condensation as the result of severe changes in tempera-
ture.
•Locations subject to corrosive or flammable gases.
•Locations subject to dust (especially iron dust) or salts.
•Locations subject to exposure to water, oil, or chemicals.
•Locations subject to shock or vibration.
Caution Take appropriate and sufficient countermeasures when installing systems in the
following locations:
•Locations subject to static electricity or other forms of noise.
•Locations subject to strong electromagnetic fields.
•Locations subject to possible exposure to radioactivity.
•Locations close to power supplies.
Caution The operating environment of the PC System can have a large effect on the lon-
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 installa-
tion and remains within the specified conditions during the life of the system.

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5Application Precautions
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5 Application Precautions
Observe the following precautions when using the PC System.
Caution 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 pre-
cautions.
Designing Circuits or Creating Ladder Programs
•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.
•Construct a control circuit so that power supply for the I/O circuits does not
come ON before power supply for the Unit. If power supply for the I/O circuits
comes ON before power supply for the Unit, normal operation may be tempo-
rarily interrupted.
•If the operating mode is changed from RUN or MONITOR mode to PROGRAM
mode, with the IOM Hold Bit ON, the output will hold the most recent status. In
such a case, ensure that the external load does not exceed specifications. (If
operation is stopped because of an operating error, including errors generated
by FALS instructions, the values in the internal memory of the CPU Unit will be
saved, but the outputs will all turn OFF.)
•For models with only the super-capacitor installed, the contents of the READ/
WRITE enable area of the DM area, HR area, AR area, and CNT data area
may be damaged if the power is turned OFF for a long time. To prevent such
damage, provide ladder program that will check AR 1314 to ensure proper op-
eration of the system.
•The life of relays largely varies depending on switching conditions. Be sure to
test operating conditions using actual Units and use the product within the spe-
cified number of switchings so as not to cause any performance problems. Us-
ing the product with performance problems may result in defective insulation
between circuits or burning of the relays.
Installation
•Install the Units properly as specified in the relevant operation manual(s). Im-
proper installation of the Units may result in malfunction.
•Do not install the PC or PC Units in places where the Units may be affected by
excessive noise. Doing so may result in malfunction.
•Install the Units properly so that they will not fall off.
•Be sure that all the mounting screws, terminal screws, and cable connector
screws are tightened to the torque specified in the relevant manuals. Incorrect
tightening torque may result in malfunction.
•Install the Expansion I/O Unit connector cover to the last Expansion I/O Unit to
prevent dust or foreign matter from entering inside the Unit. Not doing so may
result in malfunction.
•Be sure that the terminal blocks, expansion cables, and other items with lock-
ing devices are properly locked into place. Improper locking may result in mal-
function.
Wiring and Connection
•Be sure to use cables as specified in the relevant manual(s).
•Install external breakers and take other safety measures against short-circuit-
ing in external wiring. Insufficient safety measures against short-circuiting may
result in burning.
•When wiring signal lines, do not place them in the same duct as high-voltage
lines or power lines. Doing so may result in malfunction.