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Founded in 2012, Shree Vijayvargiya Technologies Pvt. Ltd. is a leading provider of industrial and commercial supplies, specializing in industrial switchgear and automation products. We focus on excellence, innovation, and customer delight across wholesale, distribution, and automation solutions.

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Omron CJ1M

Omron CJ1M Programmable Logic Controller

The Omron CJ1M is a high-performance PLC (Programmable Logic Controller) designed for applications that demand reliability, speed, and flexibility in a compact footprint. Ideal for machine control, process automation, and distributed control systems, the CJ1M series offers scalable solutions with advanced features to meet the evolving needs of modern industries.

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Omron CJ Series PLC
  • Compact 90 × 65 mm (H × D) dimensions are first class in the industry.
  • Provides excellent high-speed control performance, with high-speed processing of 0.1 μs for LD instructions and 13.3 μs for floating-point calculations.
  • Other models are available with special functions such as the CJ1M-CPU2[], which provides positioning functions and built-in I/O, and the CJ1G-CPU4[]P.
  • High-capacity Memory Cards up to 128 MB can be installed, and used to backup the program and system settings, or log customer data.
  • The large instruction set can support diverse applications. Four types of programming are supported (ladder, structured text, sequential function charts, and instruction lists), with approximately 400 instructions and 800 instruction variations.
  • These CJ-series CPU Units support structured programming using function blocks, which can improve the customer's program development resources.
  • The various protection functions provide improved security to protect valuable software resources and property.
  • The CPU Units are compatible with the CX-One Integrated Tool Package. Information for each component can be linked, and the system's data can be integrated into one database. The software can provide total support from PLC settings to network startup.
Specification Description
I/O control method Cyclic scan and immediate processing are both possible.
Programming LD (Ladder), SFC (Sequential Function Chart), ST (Structured Text), Mnemonic
CPU processing mode CJ1M CPU Units: Normal Mode or Peripheral Servicing Priority Mode
Instruction length 1 to 7 steps per instruction
Ladder instructions Approx. 400 (3-digit function codes)
Execution time
  • CJ1M CPU Units (CPU12/13/22/23):
  • Basic instructions: 0.10 μs min.
  • Special instructions: 0.15 μs min.
  • CJ1M CPU Units (CPU11/21):
  • Basic instructions: 0.10 μs min.
  • Special instructions: 0.15 μs min.
Overhead time
  • CJ1M CPU Units (CPU12/13/22/23): 0.5 ms min.
  • CJ1M CPU Units (CPU11/21): 0.7 ms min.
Unit connection method No Backplane: Units connected directly to each other.
Mounting method DIN Track (screw mounting not possible)
Maximum number of connectable Units CJ1M CPU Units: Total of 20 Units in the System, including 10 Units on CPU Rack and 10 Units on one Expansion Rack.
Maximum number of Expansion Racks
  • CJ1M CPU Units (CPU 13/23 only): 1 max. (An I/O Control Unit is required on the CPU Rack and an I/O Interface Unit is required on the Expansion Rack.)
  • CJ1M CPU Units (CPU11/12/21/22): Expansion is not possible.
Number of tasks
  • 288 (cyclic tasks: 32, interrupt tasks: 256) With CJ1M CPU Units, interrupt tasks can be defined as cyclic tasks called "extra cyclic tasks." Including these, up to 288 cyclic tasks can be used.
  • Note 1. Cyclic tasks are executed each cycle and are controlled with TKON(820) and TKOF(821) instructions.
  • Note 2. The following 4 types of interrupt tasks are supported.
    • Power OFF interrupt tasks: 1 max.
    • Scheduled interrupt tasks: 2 max.
    • I/O interrupt tasks: 32 max.
    • External interrupt tasks: 256 max.
Interrupt types Scheduled Interrupts:
  • Interrupts generated at a time scheduled by the CPU Unit's built-in timer. (See note. 1) I/O Interrupts: Interrupts from Interrupt Input Units.
  • Power OFF Interrupts (See note 2.): Interrupts executed when the CPU Unit's power is turned OFF.
  • External I/O Interrupts: Interrupts from the Special I/O Units or CPU Bus Units.
    • Note 1. CJ1M CPU Units: Scheduled interrupt time interval is 0.5 ms to 999.9 ms (in increments of 0.1 ms), 1 ms to 9,999 ms (in increments of 1 ms), or 10 ms to 99,990 ms (in increments of 10 ms)
    • Note 2. Not supported when the CJ1W-PD022 Power Supply Unit is mounted.
Function blocks (CPU Unit with unit version 3.0 or later only) Languages in function block definitions: ladder programming, structured text
CIO(CoreI/O)Area I/O Area 1,280: CIO 000000 to CIO 007915 (80 words from CIO 0000 to CIO 0079) The setting of the first word can be changed from the default (CIO 0000) so that CIO 0000 to CIO 0999 can be used. I/O bits are allocated to Basic I/O Units. The CIO Area can be used as work bits if the bits are not used as shown here.
Link Area 3,200 (200 words): CIO 10000 to CIO 119915 (words CIO 1000 to CIO 1199) Link bits are used for data links and are allocated to Units in Controller Link Systems.
CPU Bus Unit Area 6,400 (400 words): CIO 150000 to CIO 189915 (words CIO 1500 to CIO 1899) CPU Bus Unit bits store the operating status of CPU Bus Units. (25 words per Unit, 16 Units max.)
Special I/O Unit Area
  • 15,360 (960 words): CIO 200000 to CIO 295915 (words CIO 2000 to CIO 2959) Special I/O Unit bits are allocated to Special I/O Units. (10 words per Unit, 96 Units max.)
  • Note: Special I/O Units are I/O Units that belong to a special group called "Special I/O Units."
  • Example: CJ1W-AD081 Analog Input Unit
Serial PLC Link Area (CJ1M CPU Units only) 1,440 (90 words): CIO 310000 to CIO 318915 (words CIO 3100 to CIO 3189)
DeviceNet Area 9,600 (600 words): CIO 320000 to CIO 379915 (words CIO 3200 to CIO 3799) DeviceNet bits are allocated to Slaves for DeviceNet Unit remote I/O communications when the Master function is used with fixed allocations.
Fixed allocation setting 1
  • Outputs: CIO 3200 to CIO 3263
  • Inputs: CIO 3300 to CIO 3363
Fixed allocation setting 2
  • Outputs: CIO 3400 to CIO 3463
  • Inputs: CIO 3500 to CIO 3563
Fixed allocation setting 3
  • Outputs: CIO 3600 to CIO 3663
  • Inputs: CIO 3700 to CIO 3763
The following words are allocated to the Master function even when the DeviceNet Unit is used as a Slave.
Fixed allocation setting 1
  • Outputs: CIO 3370 (Slave to Master)
  • Inputs: CIO 3270 (Master to Slave)
Fixed allocation setting 2
  • Outputs: CIO 3570 (Slave to Master)
  • Inputs: CIO 3470 (Master to Slave)
Fixed allocation setting 3
  • Outputs: CIO 3370 (Slave to Master)
  • Inputs: CIO 3670 (Master to Slave)
Internal I/O Area 4,800 (300 words): CIO 120000 to CIO 149915 (words CIO 1200 to CIO 1499) 37,504 (2,344 words): CIO 380000 to CIO 614315 (words CIO 3800 to CIO 6143) These bits in the CIO Area are used as work bits in programming to control program execution. They cannot be used for external I/O.
Work Area
  • 8,192 bits (512 words): W00000 to W51115 (W000 to W511) Controls the programs only. (I/O from external I/O terminals is not possible.)
  • Note: When using work bits in programming, use the bits in the Work Area first before using bits from other areas.
Holding Area
  • 8,192 bits (512 words): H00000 to H51115 (H000 to H511) Holding bits are used to control the execution of the program, and maintain their ON/OFF status when the PLC is turned OFF or theoperating mode is changed.
  • Note: The Function Block Holding Area words are allocated from H512 to H1535. These words can be used only for the function block instance area (internally allocated variable area).
Auxiliary Area
  • Read only: 7,168 bits (448 words): A00000 to A44715 (words A000 to A447)
  • Read/write: 8,192 bits (512 words): A44800 to A95915 (words A448 to A959) Auxiliary bits are allocated specific functions.
Temporary Area 16 bits (TR0 to TR15) Temporary bits are used to temporarily store the ON/OFF execution conditions at program branches.
Timer Area 4,096: T0000 to T4095 (used for timers only)
Counter Area 4,096: C0000 to C4095 (used for counters only)
DM Area
  • 32 Kwords: D00000 to D32767 Used as a general-purpose data area for reading and writing data in word units (16 bits). Words in the DM Area maintain their status when the PLC is turned OFF or the operating mode is changed.
  • Internal Special I/O Unit DM Area: D20000 to D29599 (100 words × 96 Units) Used to set parameters for Special I/O Units.
  • CPU Bus Unit DM Area: D30000 to D31599 (100 words × 16 Units) Used to set parameters for CPU Bus Units.
Index Registers IR0 to IR15 Store PLC memory addresses for indirect addressing. Index registers can be used independently in each task. One register is 32 bits (2words). CJ1M CPU Units: Setting to use index registers either independently in each task or to share them between tasks.
Task Flag Area 32 (TK0000 to TK0031) Task Flags are read-only flags that are ON when the corresponding cyclic task is executable and OFF when the corresponding task is not executable or in standby status.
Trace Memory 4,000 words (trace data: 31 bits, 6 words)
File Memory Memory Cards: Compact flash memory cards can be used (MS-DOS format).
Function Specification
Constant cycle time 1 to 32,000 ms (Unit: 1 ms)
Cycle time monitoring Possible (Unit stops operating if the cycle is too long): 10 to 40,000 ms (Unit: 10 ms)
I/O refreshing Cyclic refreshing, immediate refreshing, refreshing by IORF(097). IORF(097) refreshes I/O bits allocated to Basic I/O Units and Special I/O Units. With the CJ1M CPU Units, the CPU BUS UNIT I/O REFRESH (DLNK(226)) instruction can be used to refresh bits allocated to CPU Bus Units in the CIO and DM Areas whenever required.
Timing of special refreshing for CPU Bus Units
  • Data links for Controller Link Units and SYSMAC LINK Units, remote I/O for DeviceNet Units, and other special refreshing for CPU Bus Units is performed at the following times:
  • CJ1M CPU Units: I/O refresh period and when the CPU BUS UNIT I/O REFRESH (DLNK(226)) instruction is executed.
I/O memory holding when changing operating modes Depends on the ON/OFF status of the IOM Hold Bit in the Auxiliary Area.
Load OFF All outputs on Output Units can be turned OFF when the CPU Unit is operating in RUN, MONITOR, or PROGRAM mode.
Timer/Counter PV refresh method CJ1M CPU Units: BCD or binary (CX-Programmer Ver. 3.0 or higher).
Input response time setting Time constants can be set for inputs from Basic I/O Units. The time constant can be increased to reduce the influence of noise and chattering or it can be decreased to detect shorter pulses on the inputs.
Mode setting at power-up Possible (By default, the CPU Unit will start in RUN mode if a Programming Console is not connected.)
Flash memory (CJ1M CPU Units only)
  • The user program and parameter area data (e.g., PLC Setup) are always backed up automatically in flash memory. (automatic backup and restore.)
  • CPU Units with unit version 3.0 or later only: When downloading projects from CX-Programmer Ver. 5.0 or higher, symbol table files (including CX-Programmer symbol names, I/O comments), comment files (CX-Programmer rung comments, other comments), and program index files (CX-Programmer section names, section comments, or program comments) are stored in comment memory within the flash memory.
Memory Card functions Automatically reading programs (autoboot) from the Memory Card when the power is turned ON. Possible
Program replacement during PLC operation Possible
Format in which data is stored in Memory Card User program: Program file format PLC Setup and other parameters: Data file format I/O memory: Data file format (binary format), text format, or CSV format
Functions for which Memory Card read/ write is supported User program instructions, Programming Devices (including CX-Programmer and Programming Consoles), Host Link computers, AR Area control bits, easy backup operation
Filing Memory Card data and the EM (Extended Data Memory) Area can be handled as files.
Debugging
  • Control set/reset
  • Differential monitoring
  • Data tracing (scheduled, per cycle, or triggered by instruction)
  • Instruction error tracing
  • Stores the location generating an error when a program error occurs
Online Editing
  • Edit multiple program sections ("circuits") in MONITOR or PROGRAM mode
  • Not supported for block programming areas
  • With CX-Programmer: full editing support
  • With Programming Console: mnemonic editing only
Program Protection
  • Overwrite protection: Set via DIP switch
  • Copy protection: Password set via CX-Programmer or Programming Console
Error Check
  • User-defined fatal and non-fatal errors
  • FPD(269) instruction checks execution time and logic per block
  • FAL and FALS instructions simulate errors on CJ1M CPUs
Error Log
  • Up to 20 errors stored with code, details, and timestamp
  • User-defined FAL errors can be excluded from the log
Serial Communications
  • Peripheral Port: Programming Device (with Programming Console), Host Links, NT Links
  • RS-232C Port: Programming Device (excluding Console), Host Links, No-protocol, NT Links, Serial Gateway (Compoway/F master)
  • Optional Serial Unit: Protocol macros, Host Links, NT Links, Modbus-RTU slave, No-protocol, Serial Gateway (Compoway/F master, Modbus master)
Clock Provided on all models. Accuracy:
Ambient temperature Monthly error
55 °C -3.5 min to +0.5 min
25 °C -1.5 min to +1.5 min
0 °C -3 min to +1 min
Note: Used to store the time when power is turned ON and when errors occur.
Power OFF detection time
  • AC Power Supply Unit: 10 to 25 ms (not fixed)
  • DC Power Supply Unit PD025: 2 to 5 ms; PD022: 2 to 10 ms
Power OFF Detection Delay 0 to 10 ms (user-defined, default: 0 ms)
Note: Not supported when the CJ1W-PD022 Power Supply Unit is mounted.
Memory Protection
  • Held Areas: Holding bits, Data Memory, Extended Data Memory, counter flags, and present values.
  • If the IOM Hold Bit is ON and the PLC is set to retain it on power ON:
    • CIO Area, Work Area, part of Auxiliary Area
    • Timer Completion Flags and PVs
    • Index and Data Registers
    • All retained for up to 20 days
Sending Commands to Host Link Computer FINS commands can be sent via Host Link using Network Communications Instructions from the PLC.
Remote Programming & Monitoring Host Link communications allow remote programming and monitoring via:
  • Controller Link
  • Ethernet
  • DeviceNet
  • SYSMAC LINK
Communicating Across Network Levels
  • Supports FINS message communication across multiple networks.
  • Pre-Version 2.0: 3 network levels
  • Version 2.0 and later:
    • 8 levels for Controller Link and Ethernet (requires CX-Integrator or CX-Net v4.0+)
    • 3 levels for other networks
Storing Comments in CPU Unit
  • I/O comments stored as symbol table files in:
    • Memory Card
    • EM File Memory
    • Comment Memory
  • Note: Comment memory supported in CX-Programmer v5.0+ and CPU unit version 3.0+.
Program Check
  • Automatic check for: missing END instructions, instruction errors
  • Can also be performed via CX-Programmer
Control Output Signals RUN output: Internal contacts turn ON (close) while CPU is running (e.g., CJ1W-PA205R)
Battery Life Battery Set: CJ1W-BAT01 (for CJ1M CPU Units)
Self-Diagnostics
  • CPU errors (watchdog timer)
  • I/O bus errors
  • Memory errors
  • Battery errors
Other Functions Stores number of times power was interrupted (stored in A514)
Name Specifications Current Consumption (A) Model Number
Maximum number of I/O points and mountable Units (No. of Expansion Racks) Program Capacity Data Area Memory LD Execution Time 5 V system 24 V system
CJ1M CPU Units
  • 640 I/O points
  • 20 Units max.
  • 1 Expansion Rack max.
 20K steps
  • 32K words
  • DM: 32K words
  • EM: None
 0.1 μs 5V: 0.58 A * --- CJ1M-CPU13
  • 320 I/O points
  • 10 Units max.
  • No Expansion Racks
 10K steps CJ1M-CPU12
  • 160 I/O points
  • 10 Units max.
  • No Expansion Racks
 5K steps CJ1M-CPU11
Catalog Name
Catalog Number[size]
Last Update
CJ1M-CPU1 Data Sheet [601KB] Dec 03, 2018 CJ1M-CPU1 Data Sheet

Applications

  • Packaging Machines
  • Textile Automation
  • Conveying Systems
  • Food and Beverage Processing
  • HVAC Control
  • Small-scale Industrial Equipment

Why Choose

  • Proven reliability and long lifecycle.
  • Seamless integration with Omron’s sensors, drives, and HMIs.
  • Cost-effective solution with strong global support.
  • Ideal for OEMs and system integrators looking for compact automation.

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