Special I/O Unit Error (Non-Fatal Error) - Omron CJ2 CPU UNIT User Manual

6 Troubleshooting

Special I/O Unit Error (Non-fatal Error)

A Special I/O Unit error occurs when there is an error in the data conversion between the CPU Unit and
a Special I/O Unit.
POWER
Lit. Lit.
* The bit corresponding to the unit number where the error occurred turns ON.
Recovery Processing Flow
Special I/O Unit error
occurs.
Restart the Special I/O Unit.
Is the error cleared?
Restart the System.
Error Causes and Remedies
Suspected cause of
error
An error specific to the
Unit
Faulty connection at Unit
(at a connector)
Unit failure
Noise
• Data corruption in bus
signals
6-22
RUN ERR/ALM
Flashing.
Reset, or turn the power OFF and back ON.
No
Yes
Check the Unit connections.
Replace the Special I/O Unit.
Restart the Special I/O Unit.
Confirmation method
Refer to the manual for the
particular Unit.
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
occurs again after this.
Error flag Error code
A402.06 0300 to 035F
or 03FF
Remedy
Same as at the left.
Tighten the screws.
Replace the applicable
Unit.
Take measures against
noise. (Investigate the
path of entry.)
• FG
• Power lines
CJ2 CPU Unit Hardware User's Manual
Error information
*
A418 to A423
Prevention of recur-
rence
Same as at the left.
Check for vibration and
shock.
Same as at the left.
Same as at the left.