Omron CJ2 User Manual page 181

I/O Setting Error (Fatal Error)
An I/O setting error will occur if the Units that are actually connected do not match the Unit in the regis-
tered I/O tables.
POWER
Lit. Not lit.
Recovery Processing Flow
I/O setting error
Check the location of
the error.
Restart the PLC.
Is the error cleared?
Restart the System.
Error Causes and Remedies
Suspected cause of
error
Faulty connection at Unit
(at a connector)
Unit failure
Noise
• Data corruption in bus
signals
CJ2 CPU Unit Hardware User's Manual
RUN ERR/ALM
Flashing.
Use the I/O table verification procedure (refer to 6-1-5
I/O Table Verification) to check where the error
occurred.
Turn the power OFF and back ON.
No
Yes
Confirmation method
Check the insertion at the
connector. Restart the
Unit and check whether
the error is cleared.
If restarting the Unit does
not clear the error, check
whether the error is
cleared by replacing the
Unit.
Restart the CPU Unit and
check whether the error
continues to occur.
CX-Program-
Error flag
mer display
I/O Setting A402.09
Error
Check the Unit
connections.
Replace the Unit
where the error
occurred.
Restart the PLC.
Remedy
Tighten the screws.
Replace the applicable
Unit.
Take measures against
noise. (Investigate the
path of entry.)
• FG
• Power lines
6 Troubleshooting
Error infor-
Error code
mation
80E0 ---
Prevention of recur-
rence
Same as at the left.
Same as at the left.
Same as at the left.
6-15
6