Omron CJ2 User Manual

6-9
6 Troubleshooting
CJ2 CPU Unit Hardware User’s Manual
6-1 CPU Unit Errors
6
6-1-7 Handling Errors
Additional Information
The CJ2 CPU Units support a startup condition setting. To start the CPU Unit in RUN or MONI-
TOR mode even if there is one or more Units that has not completed startup processing, select
the Start running program when initializing Unit/Inner board recognition Check Box in the PLC
Setup.
The CPU Unit is being reset, and Programming Devices cannot be connected.
z Error Causes and Remedies
*1 The following table shows the allowable power supply ranges for each Power Supply Unit.
Precautions for Correct UsePrecautions for Correct Use
Observe the following points when using Expansion Racks.
• Always confirm the safety of any related equipment before turning the power supply ON or
OFF.
• When the power supply is interrupted to an Expansion Rack, the CPU Unit will stop program
execution and the same operations as are performed when the power supply to the CPU Unit
is interrupted will be performed. For example, if the power OFF interrupt task is enabled, it will
be executed. If power is then restored to the Expansion Rack, the CPU Unit will perform star-
tup processing. The same operational status as existed before the power interrupt will not nec-
essarily be continued.
Name Settings Default
Start running program when initial-
izing Unit/Inner board recognition
OFF: Wait for Units.
ON: Don't wait.
OFF: Wait for Units.
CPU Reset
POWER RUN ERR/ALM
CX-Program-
mer display
Error flag Error code
Error infor-
mation
Lit. Not lit. Not lit. ---- None None None
Suspected cause of error Confirmation method Remedy
Prevention of
recurrence
Power to an Expansion Rack is OFF. Use a tester to measure
the voltage at the input
terminals of the Power
Supply Unit.
*1
Turn ON the
power.
Investigate the
reason that the
power was OFF.
The I/O Connecting Cable is incorrectly installed.
• The IN-OUT connectors are reversed.
• The cable does not have good contact at the
connectors.
• Two or more I/O Control Units are mounted on
the CPU Rack, or an I/O Control Unit is
mounted to an Expansion Rack.
Check the connections. Reconnect
the cable.
If the Cable is dis-
connected, check
for vibration and
shock.
Model Power supply voltage
Allowable power supply
voltage fluctuation
CJ1W-PA205R/PA202 100 to 240 VAC 85 to 264 VAC
CJ1W-PD025 24 VDC 19.2 to 28.8 VDC

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)