Omron CPM1A PROGRAMMING MANUAL

Cat. No. W317-E1-11

SYSMAC
CPM1A

Programmable Controllers

OPERATION MANUAL

CPM1A Programmable Controllers

Operation Manual

Revised October 2007

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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 dam­age to property.

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

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serious injury. Additionally, there may be severe property damage.

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

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serious injury. Additionally, there may be severe property damage.

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

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moderate injury, or property damage.

OMRON Product References

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

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

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

Visual Aids

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

 OMRON, 1997

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

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

Note Indicates information of particular interest for efficient and convenient operation

of the product.

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

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TABLE OF CONTENTS

PRECAUTIONS xv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 Intended Audience xvi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 General Precautions xvi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Safety Precautions xvi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Operating Environment Precautions xvii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 Application Precautions xviii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6 EC Directives xxi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7 Revised Specifications xxiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 1

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

1-1 CPM1A Features and Functions 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2 System Configuration 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 2

Unit Specifications and Components 21. . . . . . . . . . . . . . . .

2-1 Specifications 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2 Unit Components 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 3

Installation and Wiring 41. . . . . . . . . . . . . . . . . . . . . . . . . . .

3-1 Design Precautions 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-2 Selecting an Installation Site 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-3 Installing the CPM1A 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-4 Wiring and Connections 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 4

Using Peripheral Devices 77. . . . . . . . . . . . . . . . . . . . . . . . . .

4-1 Support Software Capabilities 78. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-2 Using a Programming Console 84. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-3 Programming Console Operations 90. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-4 Programming Example 112. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 5

Test Runs and Error Processing 119. . . . . . . . . . . . . . . . . . . .

5-1 Initial System Checks and Test Run Procedure 120. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-2 The CPM1A Cycle 122. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-3 Self-diagnosis Functions 123. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-4 Programming Console Operation Errors 125. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-5 Programming Errors 125. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-6 Troubleshooting Flowcharts 127. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-7 Maintenance Inspections 135. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-8 Handling Precautions 136. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 6

Expansion Memory Unit 137. . . . . . . . . . . . . . . . . . . . . . . . . .

6-1 Overview 138. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-2 Specifications and Nomenclature 139. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-3 Handling 140. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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TABLE OF CONTENTS

Appendices

A Standard Models 147. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

B Dimensions 151. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Glossary 159. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Index 175. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Revision History 179. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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About this Manual:

The CPM1A is a compact, high-speed Programmable Controller (PC) designed for control operations in
systems requiring from 10 to 100 I/O points per PC. There are two manuals describing the setup and
operation of the CPM1A: the CPM1A Operation Manual (this manual) and the CPM1/CPM1A/CPM2A/
CPM2C/SRM1(-V2) Programming Manual (W353).

This manual describes the system configuration and installation of the CPM1A and provides a basic
explanation of operating procedures for the Programming Consoles. It also introduces the capabilities of
the SYSMAC Support Software (SSS). Read this manual first to acquaint yourself with the CPM1A.

The CPM1/CPM1A/CPM2A/CPM2C/SRM1(-V2) Programming Manual (W353) provides detailed
descriptions of the CPM1A’s programming functions. The SYSMAC Support Software Operation Manu-
als: Basics and C-series PCs (W247 and W248) provide descriptions of SSS operations for the CPM1A
and other SYSMAC C-series PCs. The SYSMAC-CPT Support Software Quick Start Guide (W332) and

User Manual (W333) provide descriptions of ladder diagram operations in the Windows environment. The
WS02-CXPC1-E-V72 CX-Programmer Ver. 7.2 Operation Manual (W446) and the WS02-CXPC1-E-V7
CX-Programmer Ver. 7.2 Operation Manual: Function Blocks/Structured Text (W447) provide details of

operations for the WS02-CXPC1-E CX-Programmer. The CompoBus/S Operation Manual (W266) pro­vides CompoBus/S communications specifications and describes CompoBus/S application methods.

Please read this manual carefully and be sure you understand the information provide before attempting
to install and operate the CPM1A.

Section 1 gives a brief overview of the steps involved in developing of a CPM1A System, describes the
possible system configurations, and describes the CPM1A’s special features and functions.

Section 2 provides the technical specifications of the Units that go together to create a CPM1A PC and
describes the main components of the Units.

Section 3 describes how to install and wire a CPM1A PC.

Section 4 describes SSS capabilities, how to connect the Programming Console, and how to perform the

various Programming Console operations.

Section 5 describes how to perform a test run and how to diagnose and correct the hardware and soft­ware errors that can occur during PC operation.

Section 6 describes how to use the CPM1-EMU01-V1 Expansion Memory Unit. Follow the handling pre­cautions and procedures to properly use the Unit.

Appendix A provides tables of CPM1A Units and related products.

Appendix B provides the dimensions of CPM1A Units.

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

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

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TABLE OF CONTENTS

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Read and Understand this Manual

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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

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a period of one year (or other period if specified) from date of sale by OMRON.

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OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, REGARDING

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NON–INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR PARTICULAR PURPOSE OF THE

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PRODUCTS. ANY BUYER OR USER ACKNOWLEDGES THAT THE BUYER OR USER ALONE HAS

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DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR
INTENDED USE. OMRON DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED.

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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

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PRODUCTS, WHETHER SUCH CLAIM IS BASED ON CONTRACT, WARRANTY, NEGLIGENCE, OR

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STRICT LIABILITY.

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In no event shall the responsibility of OMRON for any act exceed the individual price of the product on

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which liability is asserted.

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IN NO EVENT SHALL OMRON BE RESPONSIBLE FOR WARRANTY, REPAIR, OR OTHER CLAIMS

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REGARDING THE PRODUCTS UNLESS OMRON’S ANALYSIS CONFIRMS THAT THE PRODUCTS

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WERE PROPERLY HANDLED, STORED, INSTALLED, AND MAINTAINED AND NOT SUBJECT TO

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CONTAMINATION, ABUSE, MISUSE, OR INAPPROPRIATE MODIFICATION OR REPAIR.

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Application Considerations

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SUITABILITY FOR USE

OMRON shall not be responsible for conformity with any standards, codes, or regulations that apply to

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the combination of products in the customer’s application or use of the products.

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At the customer’s request, OMRON will provide applicable third party certification documents identifying

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ratings and limitations of use that apply to the products. This information by itself is not sufficient for a

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complete determination of the suitability of the products in combination with the end product, machine,

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system, or other application or use.

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The following are some examples of applications for which particular attention must be given. This is not

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intended to be an exhaustive list of all possible uses of the products, nor is it intended to imply that the

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uses listed may be suitable for the products:

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• Outdoor use, uses involving potential chemical contamination or electrical interference, or conditions

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or uses not described in this manual.

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• Nuclear energy control systems, combustion systems, railroad systems, aviation systems, medical

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equipment, amusement machines, vehicles, safety equipment, and installations subject to separate

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industry or government regulations.

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

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

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NEVER USE THE PRODUCTS FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR

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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

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INSTALLED FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM.

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PROGRAMMABLE PRODUCTS

OMRON shall not be responsible for the user’s programming of a programmable product, or any

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consequence thereof.

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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.

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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

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changed without any notice. When in doubt, special model numbers may be assigned to fix or establish

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key specifications for your application on your request. Please consult with your OMRON representative

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at any time to confirm actual specifications of purchased products.

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DIMENSIONS AND WEIGHTS

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

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PERFORMANCE DATA

Performance data given in this manual is provided as a guide for the user in determining suitability and

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does not constitute a warranty. It may represent the result of OMRON’s test conditions, and the users

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must correlate it to actual application requirements. Actual performance is subject to the OMRON

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Warranty and Limitations of Liability.

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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.

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ERRORS AND OMISSIONS

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xiv

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 Con­troller. You must read this section and understand the information contained before attempting to set up or operate a
PC system.

1 Intended Audience xvi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 General Precautions xvi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Safety Precautions xvi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Operating Environment Precautions xvii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 Application Precautions xviii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6 EC Directives xxi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7 Revised Specifications xxiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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1 Intended Audience

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

• Personnel in charge of installing FA systems.

• Personnel in charge of designing FA systems.

• Personnel in charge of managing FA systems and facilities.

2 General Precautions

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

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

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

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

7Safety Precautions

WARNING It is extremely important that a PC and all PC Units be used for the specified

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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

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may result in electric shock.

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

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supplied. Doing so may result in electric shock.

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

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may result in malfunction, fire, or electric shock.

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

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Controller), including the following items, in order 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.

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• 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 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 transferring programs to other nodes, or when making changes to I/O

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memory, confirm the safety of the destination node before transfer. Not doing so
may result in injury.

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

!

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

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 burning
or malfunction.

4Operating Environment Precautions

Caution When connecting a personal computer or other peripheral device to the CPM1A,

!

either ground the 0 V side of the CPM1A or do not ground at all. Depending on
the method of grounding, the 24-V power supply may short-circuit; do not
ground the 24-V side as shown in the following diagram.

Example: Connections where 24-V Power Supply Will Short-circuit

Non-isolated DC
power supply

CPM1A Peripheral device

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:

xvii

• 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 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.

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

!

could lead to serious or possibly fatal injury.

• Always connect to a ground of 100 Ω or less when installing the Units. Not con­necting to a ground of 100 Ω or less may result in electric shock.

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

• Mounting or dismounting I/O Units, CPU Units, or any other Units.

• Assembling the Units.

• Connecting or wiring the cables.

• Connecting or disconnecting the connectors.

5Application Precautions

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 pre­cautions.

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

• 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 tempo­rarily 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 operation error (including FALS instruc­tions), the values in the internal memory of the CPU Unit will be saved, but the
outputs will all turn OFF.)

• Always use the power supply voltage 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-circuit­ing in external wiring. Insufficient safety measures against short-circuiting may
result in burning.

xviii

5Application Precautions

• Do not apply voltages to the Input Units in excess of the rated input voltage.
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.

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

• Install the Unit properly as specified in the operation manual. Improper installa­tion of the Unit may result in malfunction.

• 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.

• With version-1 CPU Units, leave the label attached wiring in order to prevent
wiring cuttings from entering in the Unit.

• With pre-version-1 CPU Units, be sure to attach the supplied labels when wir­ing in order to prevent wiring cuttings from entering in the Unit.

• Remove the label after the completion of wiring to ensure proper heat dissipa­tion. 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.

• Double-check all the wiring before turning on the power supply. Incorrect wir­ing may result in burning.

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

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

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

• Changing the operating mode of the 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 contents of

the DM and HR Areas 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. 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 the Unit, be sure to first touch a grounded metallic object in
order to discharge any static built-up. Not doing so may result in malfunction or
damage.

• Do not touch the Expansion I/O Unit Connecting Cable while the power is be­ing supplied in order to prevent any malfunction due to static electricity.

• When using a thermocouple-input type Temperature Sensor Unit, observe the
following precautions:

• Do not remove the cold junction compensator attached at the time of deliv-

ery. If the cold junction compensator is removed the Unit will not be able to
measure temperatures correctly.

• Each of the input circuits is calibrated with the cold junction compensator

attached to the Unit. If the Unit is used with the cold junction compensator
from other Units, the Unit will not be able to measure temperatures correct­ly.

xix

• Do not touch the cold junction compensator. Doing so may result in incor-

rect temperature measurement.

Caution Always clear memory before beginning to program the CPM1A. Although

!

memory is cleared before the CPU Unit is shipped (except for bits with specific
functions), AR 1314, which turns ON when the internal capacitor cannot back up
memory, may have turned ON during shipment.

Caution If the CPM1A will be turned off for periods exceeding the data backup period of

!

the internal capacitor, design the system so that it will not be influenced if data in
the DM, HR, and CNT areas is cleared when power is turned off.

Caution Either switch the CPM1A to RUN or MONITOR mode, or turn off and on power to

!

the CPM1A after changing from a Programming Device any data that is backed
up in flash memory. This data includes the user program, read-only DM area
(DM 6144 to DM 6599), and the PC Setup (DM 6600 to DM 6655).

• The user program and memory area data in the CPM1A are backed up either
by an internal capacitor or in flash memory as shown in the following table.

Backup method Data

Internal capacitor Read/write DM area (DM 0000 to DM 0999, DM 1022, and

Flash memory User program

DM 1023)

Error log area (DM 1000 to DM 1021)

HR area (HR 00 to HR 19)

Counter area (CNT 000 to CNT 127)

Read-only DM area (DM 6144 to DM 6599)

PC Setup (DM 6600 to DM 6655)

5Application Precautions

Note 1. The IR, TR, LR, and timer areas are not normally backed up when power is

turned off and all contents will be cleared the next time power is turned on.
(The PC Setup setting in DM 6601 can be used to back up this data. Refer to
details on the PC Setup later in this manual for details.)

2. The bits in the AR and SR areas have special functions and are set accord­ing to these functions when power is turned on.

• The capacitor backup time depends on the ambient temperature, as shown in

the following graph. The backup time, however, assumes that the capacitor is
fully charged, which requires that power be supplied to the CPU Unit continu­ously for at least 15 minutes.

20

10

Backup time (days)

7

1

25 40 80

Ambient temperature (C)

xx

If the power remains off for a period exceeding the data backup period,
AR 1314 will turn ON to indicate that the capacitor can no longer back up data
and the data backed up by the capacitor will be cleared. AR 1314 will remain
ON unless it is turned OFF using I/O monitor operations, using memory clear
operations, or from the user program.

If desired, the PC Setup setting in DM 6604 can be set to create a fatal error
and thus stop the system when AR 1314 goes ON.

• The data stored in flash memory will not be lost even if power remains off for a

period exceeding the data backup period, because the data stored in flash
memory will be read to the CPU Unit when the CPM1A is turned on.

• If the power is turned off without changing the mode from PROGRAM mode to

RUN or MONITOR mode after having made changes in the data that is backed
up in flash memory, the changes will not be written to flash memory. If the pow­er is then left off for more than 20 days (at 25C), the changes (i.e., the con­tents of the RAM) will be erased and the data values will become undefined.

6 EC Directives

6-1 Applicable Directives

• EMC Directives

• Low Voltage Directive

6EC Directives

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

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

EMS (Electromagnetic Susceptibility): EN61131-2
EMI (Electromagnetic Interference): EN61000-6-4

Low Voltage Directive

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

6-3 Conformance to EC Directives

All CPM1A CPU Units with model numbers ending in “-V1” conform to EC direc­tives.

The following restrictions apply to CPM1A CPU Units with model numbers not
ending in “-V1.”

• Relay Output Units and Transistor Output Units of CPU Units with DC power

supplies conform to EC Directives. Relay Output Units, however, conform to
EC Directives only when the output load power supply is outside the ranges
specified for the Low Voltage Directive (less than 75 VDC or less than 50 VAC).

• Relay Output Units and Transistor Output Units of CPM1A CPU Units with AC

power supplies do not conform to EC Directives.

(Radiated emission: 10-m regulations)

xxi

All Expansion I/O Units except for the CPM1A-20EDR conform to EC Directives.

To ensure that the machine or device in which the CPM1A PC is used complies
with EC Directives, the PC must be installed as follows:

1, 2, 3... 1. The CPM1A PC must be installed within a control panel.

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

3. CPM1A PCs complying with EC Directives also conform to the Common
Emission Standard (EN61000-6-4). Radiated emission characteristics
(10-m regulations) may vary depending on the configuration of the control
panel used, other devices connected to the control panel, wiring, and other
conditions. You must therefore confirm that the overall machine or equip­ment complies with EC Directives.

6-4 Relay Output Noise Reduction Methods

All CPM1A CPU Units with model numbers ending in “-V1” conform to the Com­mon Emission Standards (EN61000-6-4) of the EMC Directives.

For CPM1A CPU Units with model numbers not ending in “-V1,” Relay Output
Units and Transistor Output Units of CPU Units with DC power supplies conform
to the Common Emission Standards (EN61000-6-4) of the EMC Directives.
Relay Output Units, however, conform to the Common Emission Standards
(EN61000-6-4) only when the output load power supply is outside the ranges
specified for the Low Voltage Directive (less than 75 VDC or less than 50 VAC).

6EC Directives

When a Unit is built into another device, however, it may not satisfy these stan­dards due to noise generated by relay output switching. 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 including the PC is less than 5 times per minute.

Countermeasures are required if the frequency of load switching for the whole
system including the PC is more than 5 times per minute.

Countermeasure Examples

When switching an inductive load, connect a surge protector, diodes, etc., in par­allel with the load or contact. For detailed circuit examples, refer to the relevant
parts of this manual.

6-5 CPM1A-MAD01 Conformance to EMC Directives

xxii

Immunity testing conditions when using the current I/O of the CPM1A-MAD01
are as follows.

• Total accuracy: +10%/-1%

• Insert the following core in each line as shown below.

Recommended core: 2643-002402

Manufacturer: Fair Rite Products Corp.

7 Revised Specifications

The following table shows the changes that have been made in product specifi­cations beginning with lots produced in January 1998 (December 1997 for some
models).

Item Previous specifications New specifications Relevant pages

Input indicator operation
when an error occurs

Memory holding operation
of built-in capacitor

The input indicators will
maintain the current status
and will not change with the
status of the input signal
when a memory error, no
END instruction error, or
system error occurs.

If the power remains OFF
for a period exceeding the
data backup period, the
capacitor will not be able to
back up data and the
status of the data backed
up by the capacitor
(Read/write DM area, Error
log area, HR area, and
Counter area) will become
unstable.

The input indicators will
change with the status of
the input signal when a
memory error, no END
instruction error, or system
error occurs.

If the power remains OFF
for a period exceeding the
data backup period,
AR 1314 will turn ON to
indicate that the capacitor
can no longer back up data
and the data backed up by
the capacitor (Read/write
DM area, Error log area,
HR area, and Counter
area) will be cleared. The
PC Setup setting in
DM 6604 can be set to
create a fatal error and thus
stop the system when
AR 1314 goes ON.

7Revised Specifications

Item 8., Input Indicators, on
page 33.

Pages xviii to xx under 5
Application Precautions.

Page 24 under 2-1-2
Characteristics.

See also information on the
PC Setup in the

CPM1/CPM1A/CPM2A/CPM2
C/SRM1(-V2) Programmable
Controllers Programming
Manual (W353).

xxiii

Item Relevant pagesNew specificationsPrevious specifications

spec ca o s

Online editing and changing
set values from the SSS

Communications
parameters for the
peripheral port

If unsupported addresses
are set in the program for
operands or for set values
for timers or counters from
the SSS during online
editing, the values will be
accepted, but a memory
error will occur in
MONITOR or RUN mode.

Communications are not
possible if unsupported
settings are made for the
peripheral port’s
communications
parameters.

If unsupported addresses
are set in the program for
operands or for set values
for timers or counters from
the SSS during online
editing, error messages will
be displayed and the
values will not be accepted.

Communications are
possible using the following
parameters if unsupported
settings are made for the
peripheral port’s
communications
parameters.

Mode: Host Link
Standard format

1 start bit
7-bit data
Even parity
2 stop bits

9,600 bps baud
Transmission delay: None
Unit number: 0

7Revised Specifications

4-1-2 CPM1A Restrictions and
Precautions

See information on the PC
Setup in the

CPM1/CPM1A/CPM2A/CPM2
C/SRM1(-V2) Programmable
Controllers Programming
Manual (W353).

Item Previous specifications New specifications Relevant pages

Support for UM Area
allocation function

The following specifications have changed in products manufactured since Oc­tober 2000.

The UM Area allocation
function is not supported.
As a result, a memory error
will be displayed if the I/O
comment area is set
(although no actual
memory error has
occurred).

CX-Programmer can be
used to set the I/O
comment area in the CPU
Unit, and I/O comments
can be set together with
programs.

See information on UM Area
allocation in the

WS02-CXPC1-EV3
CX-Programmer Operation
Manual (W414) and the
WS02-CXPC1-E-V4
CX-Programmer Operation
Manual (W425).

The following table shows the changes that have been made in product specifi­cations beginning with the introduction of version-1 Units in May 2001 (April
2001 for some models).

Item New specifications (V1 models)

EC Directives All products with model numbers ending in “-V1”

conform to EC Directives.

Model numbers “-V1” was added to the end of the model

numbers.

External appearance

Output
specifications

Terminal blocks The functional earth terminal was eliminated

External dimensions The depth of CPU Units with AC power supplies

Relay outputs The mechanical life of output relays was

Transistor
outputs

The arrangement of input, output, and operation
indicators was changed.

The shape of the I/O connector was changed.

increased from 10 to 20 million operations.
The fuse was eliminated for both sourcing and

sinking outputs.

(i.e., converted to an NC terminal) on CPU Units
with AC power supplies.

was decreased from 85 mm to 70 mm.

xxiv

In this manual, version-1 CPU Units are referred to as V1 CPU Units and the
previous CPU Units are referred to as pre-V1 CPU Units.

Unless otherwise specified, “CPM1A” refers to both V1 and pre-V1 CPU Units.

7Revised Specifications

xxv

SECTION 1

Introduction

This section describes the CPM1A’s special features and functions and shows the possible system configurations. Refer to the
Programming Manual (W353) for details on programming actual operation.

1-1 CPM1A Features and Functions 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1-1 CPM1A Features 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1-2 I/O Terminal and IR Bit Allocation 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1-3 CPM1A Functions 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2 System Configuration 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2-1 CPU Unit and Expansion I/O Unit Configuration 10. . . . . . . . . . . . . . . . . . . . . . . . .

1-2-2 CPU Unit and Expansion Unit 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2-3 Host Link Communications 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2-4 One-to-one PC Link Communications 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2-5 One-to-one NT Link Communications 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2-6 CompoBus/S I/O Link Connections 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2-7 DeviceNet I/O Link Connections 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2-8 Peripheral Device Connections 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1

CPM1A Features and Functions Section 1-1

1-1 CPM1A Features and Functions

1-1-1 CPM1A Features

One-piece Construction The CPM1A CPU Units feature a one-piece construction including 10, 20, 30, or

40 built-in I/O terminals. The following three model groups are available: relay
output models, sinking transistor output models, and sourcing transistor output
models.

CPU Units with 10 I/O Points

CPM1A-10CD--V1 CPM1A-10CD-

CPU Units with 30 I/O Points

CPM1A-30CD--V1 CPM1A-30CD-

CPU Units with 40 I/O Points

CPM1A-40CD--V1 CPM1A-40CD-

CPU Units with 20 I/O Points
CPM1A-20CD--V1 CPM1A-20CD-

Extra I/O Capacity Up to three Expansion I/O Units can be connected to a CPM1A-30CD-(-V1)

or CPM1A-40CD-(-V1) CPU Unit to add an extra 8 or 20 I/O points for each,
for a maximum of up to 100 I/O points.

Input Filter Function The CPM1A is equipped with a filter function to prevent incorrect operation

caused by chatter or noise in the input signal. The user can select an input time
constant of 1 ms, 2 ms, 4 ms, 8 ms, 16 ms, 32 ms, 64 ms, or 128 ms.

Low-maintenance Design Flash memory provides memory backup without a battery.

Input Interrupts The CPM1A-10CD-(-V1) CPU Units can handle 2 interrupt inputs; the

CPM1A-20CD-(-V1), CPM1A-30CD-(-V1), and CPM1A-40CD-
(-V1) CPU Units can handle 4 interrupt inputs. In addition to normal input inter­rupts, the CPM1A has a counter mode that counts high-speed input signals and
triggers interrupts at fixed count multiples.

Quick-response Inputs Quick-response inputs can detect input signals with a pulse width as short as

0.2 ms regardless of their timing during the PC cycle. Quick-response inputs
and interrupt inputs use the same input terminals.

2

CPM1A Features and Functions Section 1-1

Interval Timer CPM1A PCs have a high-speed interval timer which can be set from 0.5 ms to

319,968 ms. The timer can be set to trigger a single interrupt (one-shot mode) or
repeat scheduled interrupts (scheduled interrupt mode).

High-speed Counter CPM1A PCs have a high-speed counter that can be used in incremental mode

or up/down mode. The high-speed counter can be combined with input inter­rupts to perform target value control or zone comparison control that isn’t
affected by the PC’s cycle time.

Pulse Output Function The CPM1A transistor output models have an output function capable of output-

ting a pulse of 20 Hz to 2 kHz (single-phase output).

Analog Setting Function The CPM1A PCs have 2 analog volume controls that can be used to make

manual analog settings.

Analog I/O Units

Up to 3 Analog I/O Units can be connected to provide analog inputs and outputs.
Each Unit provides 2 analog inputs and 1 analog output, so a maximum of 6 ana­log inputs and 3 analog outputs can be achieved by connecting 3 Analog I/O
Units.

Unit Analog inputs Analog outputs

CPM1A-MAD01 Signal range: 0 to 10 V, 1 to 5 V, or

4 to 20 mA, Resolution of 1/256

The open-circuit detection function
can be used with the 1 to 5 VDC
and 4 to 20 mA settings.

CPM1A-MAD11 Signal range: 0 to V 5, 0 to 10 V, 1

to 5 V, –10 to 10 V, 0 to 20 mA, or 4
to 20 mA, Resolution of 1/6,000

The open-circuit detection function
can be used with the 1 to 5 VDC
and 4 to 20 mA settings.

Signal range: 0 to 10 V,
–10 to 10 V, or 4 to
20 mA,
Resolution of 1/256

Signal range: 0 to 10 V, 1
to 5 V, –10 to 10 V, 0 to
20 mA, or 4 to 20 mA,
Resolution of 1/6,000

Temperature Sensor
Units

A Temperature Sensor Unit can be connected to provide up to 6 inputs for tem­perature input from sensors, such as thermocouples or platinum resistance
thermometers.

Temperature Sensor Unit Functions

Thermocouple input (CPM1A-TS001/002; 2/4 input points):
K: –200° to 1,300°C (–300° to 2,300°F)

0.0° to 500.0°C (0.0° to 900.0°F)

J: –100° to 850°C (–100° to 1,500°F)

0.0° to 400.0°C (0.0° to 750.0°F)

Platinum resistance thermometer input (CPM1A-TS101/102; 2/4 input points):
Pt100: –200.0° to 650.0°C (–300.0° to 1,200.0°F)
JPt100: –200.0° to 650.0°C (–300.0° to 1,200.0°F)

Host Link Communications The CPM1A PCs are compatible with the Host Link, which allows communica-

tions with personal computers. The CPM1A using the Host Link can also com­municate with Programmable Terminal using host link commands.

An RS-232C Adapter is used for 1:1 communications and an RS-422 Adapter is
used for 1:N communications.

One-to-one PC Link A data link can be created with a data area in another CPM1A, CQM1, CPM1,

SRM1 or C200HS or C200HX/HG/HE PC. An RS-232C Adapter is used to make
the 1:1 connection.

NT Link Communications High-speed operations can be achieved by providing a direct access by con-

necting the CPM1A to the OMRON Programmable Terminal through the NT Link
Interface. An RS-232C Adapter is used for this connection.

CompoBus/S I/O Link
Units

Up to 3 CompoBus/S I/O Link Units can be connected to make the CPM1A a
Slave Device in a CompoBus/S Network. The I/O Link Unit has 8 input bits (inter­nal) and 8 output bits (internal).

3

CPM1A Features and Functions Section 1-1

The CompoBus/S Network provides distributed CPU control based on a “PC +
compact PC” configuration, which is an improvement on the earlier distributed
I/O control based on a “PC + remote I/O” configuration. The distributed CPU
control makes equipment modular, so designs can be standardized, special
needs can be addressed, and modules can be replaced easily in the event of a
breakdown.

CompoBus/S Master Unit

Master PC

DeviceNet I/O Link Units DeviceNet I/O Link Units can be connected to enable using the CPM1A as a De-

viceNet slave. Up to 32 internal input and 32 internal outputs points are sup­ported for each Unit, and up to 3 Units can connected. DeviceNet application
allows networks to be constructed including devices from other manufacturers.

(or SRM1 CompoBus/S Master Control Unit)

CPM1A (Slave) CompoBus/S I/O Link Unit

CompoBus/S

Distributed CPU control

Standard Peripheral Devices The CPM1A uses the same Programming Consoles and SYSMAC Support

Software (SSS) as the C200H/HS, C200HX/HG/HE, CPM1, SRM1, and CQM1
PCs.

Programming is Possible
Using the PT

Expansion Memory Unit

Programming operation is possible through the PT screen by using an OMRON
PT that has a built-in Programming Console function.

The CPM1-EMU01-V1 Expansion Memory Unit is a program loader for small­size or micro PLCs. Using the CPM1-EMU01-V1, simple on-site transfer of user
programs and data memory is possible with PLCs.

Uploading

Download­ing

EEPROM

SYSMAC

4

yp

CPM1A Features and Functions Section 1-1

1-1-2 I/O Terminal and IR Bit Allocation

The following table shows which IR bits are allocated to the I/O terminals on the
CPM1A’s CPU Units and Expansion I/O Unit.

CPU Units

No. of I/O termi­nals on the CPU
Unit

Power supply AC DC AC DC AC DC AC DC

Model
No.

Relay
outputs

Sinking
transistor
outputs

Sourcing
transistor
outputs

CPU

Inputs 6 points:
Unit
termi­nals

Outputs 4 points:

10 20 30 40

CPM1A­10CDR-A(-V1)

CPM1A­10CDT-A(-V1)

CPM1A­10CDT1-A(-V1)

00000 to 00005

01000 to 01003

CPM1A­10CDR-D(-V1)

CPM1A­10CDT-D(-V1)

CPM1A­10CDT1-D(-V1)

CPM1A­20CDR-A(-V1)

CPM1A­20CDT-A(-V1)

CPM1A­20CDT1-A(-V1)

12 points:

00000 to 00011

8 points:

01000 to 01007

CPM1A­20CDR-D(-V1)

CPM1A­20CDT-D(-V1)

CPM1A­20CDT1-D(-V1)

CPM1A­30CDR-A(-V1)

CPM1A­30CDT-A(-V1)

CPM1A­30CDT1-A(-V1)

18 points:

00000 to 00011

00100 to 00105

12 points:

01000 to 01007

01100 to 01103

CPM1A­30CDR-D(-V1)

CPM1A­30CDT-D(-V1)

CPM1A­30CDT1-D(-V1)

CPM1A­40CDR-A(-V1)

CPM1A­40CDT-A(-V1)

CPM1A­40CDT1-A(-V1)

24 points:

00000 to 00011

00100 to 00111

16 points:

01000 to 01007

01100 to 01107

CPM1A­40CDR-D(-V1)

CPM1A­40CDT-D(-V1)

CPM1A­40CDT1-D(-V1)

Expansion I/O Units

Unit I/O Relay output

Sinking outputs Sourcing outputs

20 I/O
points

12 inputs
8 outputs

CPM1A-20EDR
CPM1A-20EDR1

CPM1A-20EDT CPM1A-20EDT1

8 inputs 8 inputs CPM1A-8ED

8 outputs 8 outputs CPM1A-8ER CPM1A-8ET CPM1A-8ET1

Transistor output

1-1-3 CPM1A Functions

Analog Setting Function CPM1A PCs have 2 variable-resistor adjustment knobs used to control analog

timer and counter settings manually. When one of the adjustments is turned, the
content of the corresponding IR word is set automatically between 0 and 200
(BCD).

Turn the adjustment knob with a Phillips screwdriver.

Analog adjustment 0

Analog adjustment 1

24 VDC 0.2 A
OUT PUT

5

CPM1A Features and Functions Section 1-1

The following table shows which IR words are allocated to the analog adjust­ments on the CPM1A’s CPU Unit.

Control Corresponding IR word Setting range (BCD)

Analog adjustment 0 IR 250

Analog adjustment 1 IR 251

Input Filter Function The input time constant for the CPM1A’s external inputs can be set to 1, 2, 4, 8,

16, 32, 64, or 128 ms. Increasing the input time constant can reduce the effects
of chatter or noise in the input signal.

Input from an input device
such as a limit switch

Input bit status

t

0000 to 0200

t

Input time constant

With the CPM1A, actual response time for each set input time constant for word
000 is different from that for word 001 or later.

Set value Word 000 Word 001 or later

1 ms 1 to 1.5 ms 0.1 to 0.3 ms

2 ms 2 to 2.5 ms 0.7 to 1.5 ms

4 ms 4 to 4.5 ms 1.5 to 2.5 ms

8 ms 8 to 8.5 ms 3 to 4.5 ms

16 ms 16 to 16.5 ms 6 to 9 ms

32 ms 32 to 32.5 ms 12 to 18 ms

64 ms 64 to 64.5 ms 24 to 35 ms

128 ms 128 to 128.5 ms 50 to 70 ms

The input response time of the CPM1A is obtained with the following:

2 ms max. (hardware performance) + input time constant (see above table)
+ cycle time

Input Interrupts The CPM1A-10CDR-(-V1)/10CDT-D(-V1)/10CDT1-D(-V1) PCs have 2 inter-

rupt input terminals and the CPM1A-20CDR-(-V1)/20CDT-
D(-V1)/20CDT1-D(-V1), CPM1A-30CDR-(-V1)/ 30CDT-D/30CDT1-D(-V1),
and CPM1A-40CDR-(-V1)/40CDT-D(-V1)/40CDT1-D(-V1) PCs have 4 inter-
rupt input terminals. There are two modes for input interrupts: input interrupt
mode and counter mode.

1, 2, 3... 1. When an interrupt occurs in Input Interrupt Mode, the main program is inter-

rupted and the interrupt program is executed immediately, regardless of the
cycle time.

2. In Counter Mode, external input signals are counted at high speed (up to
1 kHz) and an interrupt is generated each time the count reaches the set
value. When an interrupt occurs, the main program is interrupted and the
interrupt program is executed. The set value can be set from 0 to 65,535.

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