Omron CPM1A User Manual

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The following diagram shows the program execution when an interrupt occurs.
Main program
Input interrupt
Interrupt program
MOV
ADD
END
SBN00
MOV
RET
PC model Input bits Response time
CPM1A-10CDR-(-V1)/
10CDT-D(-V1)/10CDT1-D(-V1)
IR 00003 to IR 00004
0.3 ms
(1 kHz in Counter Mode)
CPM1A-20CDR-(-V1)/
20CDT-D(-V1)/20CDT1-D(-V1)/
30CDR-(-V1)/30CDT-D(-V1)/
30CDT1-D(-V1)/40CDR-(-V1)/
40CDT-D(-V1)/40CDT1-D(-V1)
IR 00003 to IR 00006
()
Note When not using as interrupt input terminals, the input bits IR 00003 to IR 00006
can be used as normal input terminals.
Caution Although IORF(97) can be used in interrupt subroutines, you must be careful of
the interval between IORF(97) executions. If IORF(97) is executed too frequent-
ly, a fatal system error may occur (FALS 9F), stopping operation. The interval
between executions of IORF(97) should be at least 1.3 ms + total execution time
of the interrupt subroutine.
CPM1A Features and Functions Section 1-1

Omron CPM1A Specifications

General

Model	CPM1A
Type	Compact PLC
Communication Ports	RS-232C (optional)
Instruction Set	Basic and advanced instructions
Operating Temperature	0 to 55°C
Storage Temperature	-20 to 75°C
Humidity	10% to 90% RH (non-condensing)
Power Supply	24 VDC or 100-240 VAC
Expansion	Expansion I/O units available
Timers	128
Counters	256 counters
I/O Points	10, 20, 30, or 40 points (depending on model)

Summary

Application Considerations

Suitability for Use

PRECAUTIONS

Intended Audience

General Precautions

Safety Precautions

Details critical safety warnings for handling PC units, power, and external circuits.

Operating Environment Precautions

Advises on suitable locations and environmental conditions for PC operation to ensure longevity.

Application Precautions

SECTION 1 Introduction

CPM1A Features and Functions

Describes the CPM1A's key features, I/O capacity, input/output functions, and communication capabilities.

System Configuration

SECTION 2 Unit Specifications and Components

Specifications

Provides general, I/O, and communications adapter specifications for CPM1A units.

Unit Components

Identifies and describes components of CPU, Expansion I/O, Analog, Sensor, CompoBus/S, DeviceNet, and Adapter units.

SECTION 3 Installation and Wiring

Design Precautions

Covers essential precautions for designing a CPM1A system, including power wiring and interlocks.

Selecting an Installation Site

CPM1A Installation and Expansion Unit Connection

Details CPM1A orientation, mounting, and connecting expansion units correctly.

Wiring and Connections

Provides guidelines and diagrams for power, input, output, and communication wiring.

SECTION 4 Using Peripheral Devices

Using a Programming Console

Programming Console Operations

SECTION 5 Test Runs and Error Processing

Initial System Checks and Test Run Procedure

Guides on initial system checks and the CPM1A test run process.

The CPM1A Cycle and Self-Diagnosis Functions

Error Handling and Troubleshooting

Details error messages, programming errors, and troubleshooting flowcharts.

SECTION 6 Expansion Memory Unit