OMRON SYSMAC CPM1A series programmable controller

Basic product information

Omron CPM1A is a compact high-speed PLC designed for small control systems with 10-100 I/O. It is divided into V1 version and Pre-V1 version, and the V1 version is fully compliant with EC directives.

Program capacity: 2048 words

Instruction types: 14 basic instructions, 77 special instructions (135)

Instruction execution speed: Basic instruction 0.72-16.2 μ s

Backup method:

Flash: User Program, Read Only DM Area, PC Settings

Internal capacitance: Read/write DM area, HR area, counter, backup for up to 20 days at 25 ℃

Hardware specifications and composition

(1) CPU Unit Model 

I/O point input/output power supply model suffix

10:6:4:00am AC/DC 10CDR/10CDT/10CDT1

20:12:08:00 AC/DC 20CDR/20CDT/20CDT1

30:18:12pm AC/DC 30CDR/30CDT/30CDT1

40 o’clock 24 o’clock 16 o’clock AC/DC 40CDR/40CDT/40CDT1

(2) Expansion Unit

Maximum expansion: 3 expansion units, 30/40 point CPU can be expanded to 100 point I/O

Type: I/O Expansion, Analog I/O, Temperature Sensor, CompoBus/S, DeviceNet Unit

Analog quantity: up to 6 inputs and 3 outputs, resolution 1/256~1/6000

(3) Environmental and electrical parameters

Working temperature: 0~55 ℃, humidity 10%~90% (no condensation)

Power supply: AC 100~240V, DC 24V

Grounding: ≤ 100 Ω

Anti vibration: 0.075mm at 10~57Hz, 9.8m/s ² at 57~150Hz

Installation and wiring specifications

(1) Installation requirements

Prohibited: direct sunlight, high temperature, high humidity, corrosive gases, dust, vibration

Installation method: panel installation, 35mm DIN rail installation

Distance: ≥ 200mm * * from high-voltage equipment to ensure ventilation and heat dissipation

(2) Core requirements for wiring

Power supply: AC/DC strictly distinguished, independent circuit, with circuit breaker added

Grounding: Dedicated grounding, ≤ 100 Ω, wire diameter ≥ 1.25mm ²

Input: 24VDC, ON voltage ≥ 14.4V, OFF voltage ≤ 5V

output:

Relay: 2A/point, 250VAC, mechanical life V1 version 20 million times

Transistor: 0.3A/point, 24VDC, drain/source type

Safety: External emergency stop, interlock, and limit circuits must be configured

Peripherals and Programming Operations

(1) Support peripherals

Programmer: CQM1-PRO01-E, C200H-PRO27-E

Software: SSS, SYSMAC-CPT, CX Programmer

Communication adapters: CPM1-CIF01 (RS232), CPM1-CIF11 (RS422)

(2) Working mode

Program: programming, clearing memory, program checking

MONITOR: Run+Monitor, Force Set/Reset, Modify Parameters

RUN: Normal operation, no modifications allowed

(3) Programming operation

Language: ladder diagram

Essential instruction: END (01) must be added at the end of the program

Operation: Address positioning, writing, inserting, deleting, searching, monitoring

Debugging and troubleshooting

(1) Self diagnostic function

Fatal error: Stop running, all outputs disconnected, ERR/ALM constantly on

Non fatal error: Continuing to run, ERR/ALM flashing

Common errors: memory error, no END instruction, I/O bus error, scan timeout

(2) Troubleshooting process

Power check: PWR indicator light

Operation check: RUN indicator light

Error checking: ERR/ALM status

I/O check: input/output indicator lights and wiring

Environmental inspection: temperature and humidity, dust, interference

(3) Program inspection

Level 3 inspection: detect circuit errors, operand errors, coil duplication, jump/subroutine errors

Expansion and Special Features

(1) Communication function

Host Link: Communication with 32 PLCs

NT Link: 1-on-1 connected touch screen

DeviceNet: Up to 3 slave units, 96 inputs and 96 outputs

CompoBus/S: 8 in and 8 out stations

(2) Special Features

High speed counter: 5kHz single-phase/2.5kHz two-phase

Pulse output: 20Hz~2kHz, controlling stepper motor

Input interrupt: 2/4 channels, response 0.3ms

Fast response input: minimum 0.2ms pulse

Interval timer: 0.5ms~319968ms interrupt

(3) Expand memory

CPM1-EMU01-V1: Program download, supports EEPROM storage

Maintenance and Safety

Regular inspection: power supply, environment, wiring, installation and fastening

Relay lifespan: 150000 times for resistive loads and 100000 times for inductive loads

Safety taboos: Do not disassemble, touch terminals, or modify equipment when powered on

Key questions and answers

Question 1: What is the memory backup method and duration for CPM1A? How to determine data loss?

answer:

Backup is divided into two types: Flash memory and internal capacitors:

Flash: permanently saves user programs, read-only DM area (6144~6599), PC settings (6600~6655), without power failure or loss;

Capacitor: stores read and write DM area, HR area, and counter. It can be backed up for up to 20 days in a 25 ℃ environment, and the higher the temperature, the shorter the backup time.

When the capacitor backup fails, the AR1314 bit will be set to ON, and the corresponding data will be reset. This flag can be cleared through the programmer.

Question 2: What are the output types of CPM1A? What are the respective electrical parameters and usage restrictions?

answer:

Relay output:

Capacity: 2A/point, 250VAC/24VDC, maximum common terminal 4A;

Lifespan: V1 version mechanical 20 million cycles, electrical resistance 150000 cycles;

Limitation: Suitable for AC/DC loads, action delay of 15ms.

Transistor output (drain/source):

Capacity: 0.3A/point, 24VDC, common terminal 0.9A;

Features: Fast response of 0.1~1ms, supporting 20Hz~2kHz pulse output;

Limitation: Only DC load, pulse output must ensure a load current of 0.1~0.2A.

Question 3: How to quickly troubleshoot and solve the fatal error of CPM1A with RUN light not on and ERR/ALM constantly on?

answer:

Troubleshooting steps:

Use a programmer to read error codes and locate the type of fault;

Check whether the program has END instruction, whether the connection of the expansion unit is loose, and whether the memory reports errors;

Check the error flags (AR1308~AR1314) in the AR area.

Common solutions:

No END instruction: Add END (01) at the end of the program;

Memory error: Clear all memory and download program again;

I/O bus error: Re plug and unplug expansion cables to reduce the number of expansion units;

After resolving the issue, clear the error in the program mode and restart the operation.