Omron CPM2C Operation Manual page 145

Fatal Error Check
RUN indicator not lit.
No
Is the ERR/ALM
indicator lit?
Yes
Determine the cause
of the error with a
Programming Device.
Is PC mode displayed on
Programming Device?
Yes
Is a fatal error
displayed?
No
Switch to RUN or
MONITOR mode.
Is the RUN
indicator lit?
Yes
End
Yes
Is PC mode displayed
on Programming
Device?
No
Turn the power
supply OFF, and
then ON again.
Yes
Identify the error, eliminate
its cause, and clear the
error.
Follow the Memory Error
Check flowchart if a
memory error has occurred.
No
Section 5-5
No
Replace the CPU
Unit.