Cpu Reset - Omron CJ2 User Manual

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.
Start running program when initial-
izing Unit/Inner board recognition

CPU Reset

The CPU Unit is being reset, and Programming Devices cannot be connected.
POWER
Lit. Not lit.
Error Causes and Remedies
Suspected cause of error
Power to an Expansion Rack is 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.
*1 The following table shows the allowable power supply ranges for each Power Supply Unit.
Model
CJ1W-PA205R/PA202
CJ1W-PD025
Precautions for Correct Use Precautions 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.
CJ2 CPU Unit Hardware User's Manual
Name
OFF: Wait for Units.
ON: Don't wait.
CX-Program-
RUN ERR/ALM
Not lit. ----
Power supply voltage
100 to 240 VAC
24 VDC
Settings Default
OFF: Wait for Units.
Error flag
mer display
None
Confirmation method
Use a tester to measure Turn ON the
the voltage at the input power.
terminals of the Power
*1
Supply Unit.
Check the connections. Reconnect
the cable.
Allowable power supply
voltage fluctuation
85 to 264 VAC
19.2 to 28.8 VDC
6 Troubleshooting
Error infor-
Error code
mation
None None
Prevention of
Remedy
recurrence
Investigate the
reason that the
power was OFF.
If the Cable is dis-
connected, check
for vibration and
shock.
6
6-9