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SYSMAC CJ-series CJ1M CPU Units (with Ethernet function)


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Features :

  • Compact 90 × 65 mm (H × D) dimensions are first class in the industry.
  • SYSMAC CJ-series CPU Unit with the functionality of an Ethernet Unit.
  • The CPU functional element has the same functionality as a CJ1M-CPU11/12/13. The enables effective usage of legacy applications.
  • 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.





Item Specifications
Control method Stored program
I/O control method Cyclic scan and immediate processing are both possible.
Programming Languages Ladder Logic (LD), Sequential Function Charts (SFC), Structured Text (ST), and Mnemonic.
CPU processing mode Normal Mode or Peripheral Servicing Priority Mode
Instruction length 1 to 7 steps per instruction
Ladder instructions Approx. 400 (3-digit function codes)
Basic instructions 0.10 μs min.
Special instructions 0.15 μs min.
Overhead time CJ1M-CPU12-ETN/CPU13-ETN: 0.5 ms min.
CJ1M-CPU11-ETN: 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
Total of 19 Units, including 9 Units on CPU Rack and 10 Units on one Expansion Rack.
(The built-in Ethernet port on the CPU Unit must be allocated to a slots 0, and is counted as one Unit.
Maximum number of Expansion
CJ1M-CPU13-ETN: 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-CPU11-ETN/12-ETN: Expansion is not possible.
Number of tasks 288 (cyclic tasks: 32, interrupt tasks: 256)
With CJ1-H or 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.
Cyclic tasks are executed each cycle and are controlled with TKON(820) and TKOF(821) instructions.
Note 1.
The following 4 types of interrupt tasks are supported.
Note 2.
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 Units built-in timer.
I/O Interrupts: Interrupts from Interrupt Input Units.
Power OFF Interrupts (See note): Interrupts executed when the CPU Units power is turned OFF.
External I/O Interrupts: Interrupts from the Special I/O Units or CPU Bus Units.
Note: Not supported when the CJ1W-PD022 Power Supply Unit is mounted.
Calling subroutines from more
than one task
Supported (called global subroutines).
(Core I/O)
I/O Area 2,560: CIO 000000 to CIO 015915 (160 words from CIO 0000 to CIO 0159)
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
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
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
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.)
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 3770 (Slave to Master)
Inputs: CIO 3670 (Master to Slave)
Internal I/O Area 4,800 bits (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 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 the
operating 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.
EM Area None
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 (2 words).
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).
OMRON Memory Cards can be used.
Constant cycle time 1 to 32,000 ms (Unit: 1 ms)
Cycle time
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).
Note: ORF(097) refreshes I/O bits allocated to Basic I/O Units and Special I/O Units.
Timing of special
refreshing for CPU
Bus Units
Data links for Controller Link Units remote I/O for DeviceNet Units, and other special refreshing for
CPU Bus Units is performed at the following times:
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
Timer/Counter PV
refresh method
BCD or binary (CX-Programmer Ver. 3.0 or higher).
Input response time
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
Note: By default, the CPU Unit will start in RUN mode if a Programming Console is not connected.
Flash memory
(CJ1-H and 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
Automatically reading programs
(autoboot) from the Memory Card
when the power is turned ON.
Program replacement during PLC
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, each cycle, or when instruction is
executed), instruction error tracing, storing location generating error when a program error occurs.
Online editing User programs can be overwritten in program-block units when the CPU Unit is in MONITOR or
This function is not available for block programming areas.
With the CX-Programmer, more than one program block can be edited at the same time.
Program protection Overwrite protection: Set using DIP switch.
Copy protection: Password set using CX-Programmer or Programming Consoles.
Error check User-defined errors (i.e., user can define fatal errors and non-fatal errors)
The FPD(269) instruction can be used to check the execution time and logic of each programming
Note: FAL and FALS instructions can be used with the CJ1-H and CJ1M CPU Units to simulate errors.
Error log Up to 20 errors are stored in the error log. Information includes the error code, error details, and the
time the error occurred.
Note: CJ1M CPU Unit can be set so that user-defined FAL errors are not stored in the error log.
Built-in peripheral port: Programming Device (including Programming Console) connections, Host
Links, NT Links, Serial Gateway (CompoWay/F master)
Built-in RS-232C port: Programming Device (excluding Programming Console) connections, Host
Links, no-protocol communications, NT Links, Modbus-RTU Slave, Serial Gateway (CompoWay/F
master or Modbus master)
Serial Communications Unit (sold separately): Protocol macros, Host Links, NT Links
Clock Provided on all models.
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 time
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, contents of Data Memory and Extended Data Memory, and status of the
counter Completion Flags and present values.
If the IOM Hold Bit in the Auxiliary Area is turned ON, and the PLC Setup is set to maintain the IOM
Hold Bit status when power to the PLC is turned ON, the contents of the CIO Area, the Work Area,
part of the Auxiliary Area, timer Completion Flag and PVs, Index Registers, and the Data Registers will
be saved for up to 20 days.
Sending commands
to a Host Link
FINS commands can be sent to a computer connected via the Host Link System by executing
Network Communications Instructions from the PLC.
programming and
Host Link communications can be used for remote programming and remote monitoring through a
Controller Link System or Ethernet network.
network levels
Remote programming and monitoring from Support Software and FINS message communications can
be performed across different network levels, even for different types of network.
Pre-Ver. 2.0: Three levels
Version 2.0 or later: Eight levels for Controller Link and Ethernet networks (See note.), three levels
for other networks.
Note: To communicate across eight levels, the CX-Integrator or the CX-Net in Programmer version
4.0 or higher must be used to set the routing tables.
Storing comments
in CPU Unit
I/O comments can be stored as symbol table files in the Memory Card, EM file memory, or comment
memory (see note).
Note: Comment memory is supported for CX-Programmer version 5.0 or higher and CS/CJ-series
CPU Units with unit version 3.0 or later only.
Program check Program checks are performed at the beginning of operation for items such as no END instruction
and instruction errors.
CX-Programmer can also be used to check programs.
Control output
RUN output: The internal contacts will turn ON (close) while the CPU Unit is operating (CJ1W-PA205R).
Battery life Battery Set for CJ1M CPU Units: CJ1W-BAT01
Self-diagnostics CPU errors (watchdog timer), I/O bus errors, memory errors, and battery errors.
Other functions Storage of number of times power has been interrupted. (Stored in A514.)



Ethernet Functional Element Transfer Specifications

Item Specifications
Media access method CSMA/CD
Modulation method Baseband
Transmission paths Star form
Baud rate 100 Mbit/s (100Base-TX), 10 Mbit/s (10Base-T)
Transmission media 100 Mbit/s Unshielded twisted-pair (UDP) cable Categories: 5, 5e
Shielded twisted-pair (STP) cable Categories: 100 Ω at 5, 5e
10 Mbit/s Unshielded twisted-pair (UDP) cable Categories: 3, 4, 5, 5e
Shielded twisted-pair (STP) cable Categories: 100 Ω at 3, 4, 5, 5e
Transmission distance 100 m (distance between hub and node)
Number of cascade connections There are no restrictions with the use of switching hubs.
CPU Bus Unit System Setup Area capacity 994 bytes


Note:The system settings for Ethernet are in the CPU Bus Unit System Setup Area in the CPU Unit.