Omron CJ2 User Manual

7 Inspection and Maintenance
7-4
CJ2 CPU Unit Hardware User’s Manual
Check the following after replacing any faulty Unit.
• Do not replace a Unit until the power is turned OFF.
• Check the new Unit to make sure that there are no errors.
• If a faulty Unit is being returned for repair, describe the problem in as much detail as possible,
enclose this description with the Unit, and return the Unit to your OMRON representative.
• For poor contact, take a clean cotton cloth, soak the cloth in industrial alcohol, and carefully wipe the
contacts clean. Be sure to remove any lint prior to remounting the Unit.
Precautions for Correct UsePrecautions for Correct Use
• When replacing a CPU Unit, be sure that not only the user program but also all other data
required for operation is transferred to or set in the new CPU Unit before starting operation,
including DM Area and HR Area settings. If data area and other data are not correct for the
user program, unexpected accidents may occur.
• Be sure to include the routing tables, Controller Link Unit data link tables, network parameters,
and other CPU Bus Unit data, which are stored as parameters in the CPU Unit. Be sure to set
this data again after replacing the CPU Unit.
• Refer to the CPU Bus Unit and Special I/O Unit operation manuals for details on the data
required by each Unit.
Additional Information
The simple backup operation can be used to store the user program and all parameters for the
CJ2 CPU Unit, DeviceNet Units, Serial Communications Units, and other specific Units in a
Memory Card as backup files. A Memory Card and the simple backup operation can be used to
easily restore data after replacing any of these Units.
Refer to 8-3-6 Data Backed Up Using Simple Backup for details.
7-1-2 Unit Replacement Precautions

Omron CJ2 Specifications

General

Model	CJ2
Manufacturer	Omron
Type	Programmable Logic Controller (PLC)
CPU Units	Multiple models available (e.g., CJ2M, CJ2H)
Number of I/O Points	Up to 2, 560 points
Communication Ports	Ethernet/IP, EtherCAT, USB, Serial
Expansion	Yes, via I/O Units and Special I/O Units
I/O Control Method	Cyclic Scan, Interrupt
Programming Language	Ladder diagram, structured text, function block diagram, sequential function chart, instruction list
Built-in I/O	Available on some models (e.g., CJ2M)
Ethernet Port	Yes, 1 port (depending on CPU Unit)
Serial Ports	RS-232C, RS-422/485 (configurable)
USB Port	Yes (for programming and monitoring)
Operating Temperature	0°C to 55°C
Storage Temperature	-25 to 70°C
Humidity	10 to 95% RH (non-condensing)
Vibration Resistance	10 to 57 Hz, Amplitude: 0.075 mm, 57 to 150 Hz, Acceleration: 1 G, X, Y, and Z directions, 80 min each
Power Supply Voltage	24 VDC or 100 to 240 VAC (depending on CPU Unit)