OMRON CPM2C Programmable Controller

OMRON CPM2C Programmable Controller

1. Basic Overview

The CPM2C programmable controller operation manual released by Omron is the only official guidance document for the installation, wiring, programming, debugging, and maintenance of this model. It is also used in conjunction with the programming manual (W353) and CX Programmer operation manual (W437). Applicable personnel: FA system design, installation, and operation personnel with electrical knowledge.

2. Safety and usage regulations

(1) Safety warning level

Level meaning and consequences

DANGER Extremely dangerous death/serious injury+severe property damage

! Warning Potential fatal danger of death/serious injury

! Caution Minor danger Minor injury/equipment damage

(2) Core security requirements

Grounding: The grounding resistance of the power unit is ≤ 100 Ω to prevent electric shock;

Live operation: It is strictly prohibited to disassemble, touch terminals, or modify equipment when powered on;

External security: Emergency stop, interlock, and limit external circuits must be configured;

Battery: Do not disassemble, heat, or short-circuit backup batteries to prevent explosion and leakage.

(3) Operating environment requirements

Temperature: 0~55 ℃, storage -20~75 ℃;

Humidity: 10%~90% RH, no condensation;

Prohibited: direct sunlight, corrosive/flammable gases, dust, strong vibration, strong electromagnetic interference.

3. Hardware core specifications

(1) Basic parameters

Power supply: 24VDC (working range 20.4~26.4VDC);

Program capacity: 4096 words, basic instruction execution speed of 0.64 μ s;

I/O configuration:

Single machine: 10 o'clock (6 in and 4 out), 20 o'clock (12 in and 8 out), 32 o'clock (16 in and 16 out);

Expansion: Up to 5 expansion units can be connected, with a maximum of 192 I/O points;

Memory backup:

Equipped with clock: lithium battery backup (2 years at 25 ℃);

No clock: capacitor backup (10 days) or optional battery (5 years).

(2) Core control function

Functional parameters applicable models

High speed counter 5kHz (phase difference)/20kHz (single-phase) for all models

Pulse output 10Hz~10kHz, 2-point simultaneous output transistor output type

Synchronous pulse control input frequency 10-20kHz, output 10kHz transistor output type

Fast response input minimum pulse width 50 μ s 20/32 point CPU unit

Interrupt input 2-point (10 point CPU)/4-point (20/32 point CPU) for all models

(3) Expansion unit type

Digital expansion: 10/20/24/32 point IO unit, relay/transistor output;

Analog unit: CPM2C-MAD11, 2 inputs and 1 output, resolution 1/6000;

Temperature unit: CPM2C-TS001 (thermocouple)/TS101 (platinum resistance), 2-point input;

Communication units: CPM2-CIF21 (simple communication), CPM2C-SRT21 (CompoBus/S slave);

Power supply unit: CPM2C-PA201100~240VAC input, 24VDC/600mA output.

4. Installation and wiring

(1) Installation method

Standard: 35mm DIN rail installation, must be placed horizontally to ensure heat dissipation;

Spacing: Distance from other devices * * ≥ 100mm * *, away from heat sources.

(2) Wiring specifications

Power supply: AC power terminal torque 0.74-0.9N · m, AC connection to 24V terminal is prohibited;

IO wiring: power supply IO、 Separate communication lines with a spacing of ≥ 300mm;

Output protection: Inductive loads require parallel surge absorbers/diodes, relay output life: electrical 100000 times, mechanical 20 million times;

Communication wiring: RS-422/485 requires terminal resistors at both ends, with RS-422 having 235 Ω and RS-485 having 118 Ω.

5. Programming and Operations

(1) Working mode

Program: Program editing, parameter settings, prohibit running;

MONITOR: Program running, supports online modification, forced IO, and monitoring;

RUN: Normal operation, only monitoring, prohibited from modification.

(2) Programming tools

Handheld programmers: CQM1H-PRO01-E, CQM1-PRO01-E, C200H-PRO27-E;

Computer software: CX Programmer (V2.1 and above) SYSMAC-CPT。

(3) Core Operations

Program operations: writing, modifying, inserting/deleting instructions, program checking;

Monitoring operations: bit/word monitoring, forced set/reset, timed/counter value modification;

Communication operation: Host Link, no protocol, 1:1 NT Link, 1:1 PLC Link.

6. Debugging and maintenance

(1) Debugging process

System design → hardware installation → wiring → initial setup → program writing → trial operation;

Self diagnosis: detect CPU, battery, memory, IO bus faults;

Fault handling: According to the ERR/ALARM indicator light, a fatal error will cause the machine to shut down, while a non fatal error will continue to operate.

(2) Maintain the project

Battery replacement: Replace when low battery alarm occurs and maintain power-off operation;

Regular inspection: check wiring, terminals, heat dissipation, and environment;

Error log: stored in DM2000~DM2021, historical faults can be viewed.

7. Communication function

Port: One communication port can simultaneously serve as an external device port and RS-232C port;

Protocol: Host Link, no protocol, 1:1 PLC Link, 1:1 NT Link;

Expansion: CPM2-CIF01-V1 (Peripheral/RS-232C), CPM2-CIF11 (RS-422/232C);

Networking: 1: N Host Link can connect up to 32 PLCs.

Key questions and answers

Question 1: What is the I/O expansion capability and maximum configuration of CPM2C PLC?

Answer: The CPM2C CPU unit can connect up to 5 expansion I/O/expansion units, with single machine I/O available in three specifications: 10/20/32 points; When paired with a 32 point CPU unit and 5 32 point expansion units, a maximum of 192 I/O points (96 inputs and 96 outputs) can be achieved.

Question 2: What are the three working modes of CPM2C and what are their usage scenarios?

answer:

Program mode: used for program writing, modification, parameter setting, memory clearing, without executing the program, and is the basic mode for programming and debugging;

MONITOR mode: The program runs normally and can monitor online, force IO, modify parameters, and be used for on-site debugging and troubleshooting;

RUN mode: The program runs at full speed, only supports status monitoring, prohibits any modification operations, and is used for the official operation of the device.

Question 3: What are the core safety points for wiring and installation of CPM2C?

answer:

Grounding: The grounding resistance of the power unit must be * * ≤ 100 Ω * * to prevent electric shock and interference;

Live taboos: It is strictly prohibited to disassemble units, connect wires, or replace batteries when powered on;

Environment: Installed in a position with 0~55 ℃, no dust corrosion, no strong vibration, and horizontally mounted on DIN rails;

Output protection: Inductive loads must be connected in parallel with surge absorbing devices to prevent damage to the output module;

Terminal tightening: The torque of the power terminal is 0.74-0.9N · m to avoid loosening and burning.