6 Troubleshooting
6-22
CJ2 CPU Unit Hardware User’s Manual
z Error Causes and Remedies
Suspected cause of
error
Confirmation method Remedy
Prevention of recur-
rence
An error specific to the
Unit
Refer to the manual for the
particular Unit.
Same as at the left. Same as at the left.
Faulty connection at Unit
(at a connector)
Check the insertion at the
connector. Restart the
Unit and check whether
the error is cleared.
Tighten the screws. Check for vibration and
shock.
Unit failure If restarting the Unit does
not clear the error, check
whether the error is
cleared by replacing the
Unit.
Replace the applicable
Unit.
Same as at the left.
Noise
• Data corruption in bus
signals
Restart the CPU Unit and
check whether the error
occurs again after this.
Take measures against
noise. (Investigate the
path of entry.)
•FG
• Power lines
Same as at the left.
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