Omron CJ2 User Manual page 186

6 Troubleshooting
CPU Bus Unit Error (Non-fatal Error)
A CPU Bus Unit error occurs when there is an error in the data conversion between the CPU Unit and a
CPU Bus Unit.
POWER
Lit. Not lit.
*1 The exes (XX) indicate the unit number where the error occurred.
*2 The bit corresponding to the unit number where the error occurred turns ON. (Bits 00 to 15 correspond to unit
numbers 0 to F.)
Recovery Processing Flow
CPU Bus Unit error
occurs.
Check the location where
the error occurred.
Restart the PLC
Is the error cleared?
Yes
Restart the System.
6-20
CX-Program-
RUN ERR/ALM
Flashing. CPU Bus Unit
Error XX
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
Check the Unit
connections
Replace the Unit
where the error
occurred.
Restart the PLC.
Error flag
mer display
A402.07
*1
CJ2 CPU Unit Hardware User's Manual
Error infor-
Error code
mation
0200 to 020F *2
A417