OMRON CJ Series PLC (CJ1H-R/H/G, CJ1M, CJ1) Operating Instructions

Product scope and unit version management

Covered models

High speed type: CJ1H CPU @ @ H-R (Ver. 4.0/4.1/4.2)

Standard type: CJ1G/H-CPU @ @ H, CJ1G CPU@@

Loop control type: CJ1G CPU @ @ P (built-in loop control board)

Compact: CJ1M CPU @ @ (with built-in I/O and pulse functions)

Unit version rules

Ver.2.0: Task independent download and upload, 8-level network communication, I/O slot header setting

Ver.3.0: FB Function Block, Serial Gateway, Annotation Flash, Simple Backup Expansion

Ver.4.0: FB online editing, input/output variables, string support, ST/SFC programming

CJ1H-R: Basic instruction 0.016 μ s, floating point operation speed increased by 70 times, newly added high-speed timer

Core Performance Parameters (Key Tables)

Model Basic Instructions Special Instructions Program Capacity Maximum I/O Expansion Rack

CJ1H-R 0.016 μ s 0.048 μ s 250K step 2560 point 3

CJ1H 0.02 μ s 0.06 μ s 60~120K step 2560 point 3

CJ1M 0.10 μ s 0.40 μ s 5-20K step 640 point 1

CJ1 0.08 μ s 0.29 μ s 10~60K step 1280 points 3

System architecture and installation

structure

No backboard side plug connection, DIN rail installation, cannot be fixed with screws

The mainframe can have up to 10 units and up to 40 units

Expansion rules

CJ1H/CJ1G/CJ1: Up to 3 expansion racks

CJ1M: Up to 1 expansion rack

Power supply unit

Model: CJ1W-PA203/206/216 (AC), PD026 (DC)

5V bus current: maximum 6A

Memory Area System

Regional abbreviation, capacity, power outage maintenance purpose

Core I/O CIO 6144 word No External I/O, Internal Relay

The HR 512 word retention area is for status maintenance

System flags, errors, and clocks in the AR 448 character section of the auxiliary area

Data memory DM 32768 words are parameters, formulas, and data

Extended memory EM up to 13Bank for large capacity data and file storage

Timer counter TC 8192 word SV maintains timing and counting

Programming and Functional Architecture

programming paradigm

Multi tasking: 32 loop tasks+256 interrupt tasks

Language: ladder diagram, ST structured text, SFC sequential function diagram

Function block FB: supports online editing, string, array variables

High speed function

Interrupt: timed interrupt starting from 0.1ms, input interrupt, high-speed counting interrupt

High speed counting: up to 100kHz, 4-axis

Pulse output: 100kHz, 2-axis, supports origin regression and triangle control

communication skills

Network: Ethernet, Controller Link, DeviceNet

Serial port: RS-232C, supports serial gateway, protocol macros, and protocol free communication

Penetration: Up to 8 levels of network cross network access

Protection and Security

program protection

Machine password, task password, no backup, no rewriting allowed

Network protection

FINS write protection, can release specified nodes

hardware protection

Overcurrent, Overvoltage, Overheating, Battery Low Voltage, Unit Abnormality

Fault diagnosis and maintenance

diagnosis

Error log: Record the last 20 faults

Status lights: POWER/RUN/ALARM/ERROR

Auxiliary Zone Sign: Accurately locate the type of fault

maintain

Flash backup: Program/parameter battery free storage

Easy backup: One click backup to storage card

Battery life: 5 years at 25 ℃

Key issues

Question 1: What is the core improvement of CJ1H-R high-speed CPU compared to ordinary CJ1H? What scenarios are applicable?

answer

Speed: Basic instruction 0.016 μ s (25% faster), floating-point operations 70 times faster

Processing: I/O refresh, interrupt response, and FB startup are all accelerated by more than twice

Function: Added 0.1ms timed interrupt, high-speed trigonometric function, 1ms timer

Scenario: Millisecond level response devices such as high-speed packaging, flying shears, electronic camshafts, and high-frequency data acquisition.

Question 2: What are the core differences between unit versions Ver.2.0/3.0/4.0? What are the limitations of upgrading?

answer

Ver.2.0: Task loading and downloading separately, 8-level network, slot address setting

Ver.3.0: FB Function Block, Serial Gateway, Annotation Flash Memory

Ver.4.0: FB online editing, string ST/SFC

Restriction: High version programs cannot be downloaded to low version CPUs and will report compilation errors.

Question 3: What are the two modes of CJ series I/O allocation? What situations are applicable to each?

answer

Automatic allocation: power on automatic recognition unit, suitable for rapid construction, on-site renovation, and small projects

Fixed I/O table: manually specified address, suitable for standardized equipment, batch production, and safety systems

Switching: Select in the PLC settings, and after modification, it needs to be powered off and restarted to take effect.