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168
Troubleshooting Flowcharts
Section 8-4
Fatal Error Check
Identify the error, eliminate
its cause, and clear the
error.
Follow the Memory Error
Check flowchart if a
memory error has occurred.
Determine the cause
of the error with a
Programming Device.
End
RUN indicator not lit.
Replace the CPU
Board.
Turn the power
supply OFF, and
then ON again.
Switch to RUN or
MONITOR mode.
No
Yes
Is a fatal error
displayed?
No
Yes
Yes
No
Is the RUN
indicator lit?
No
Yes
Yes
No
Is the ERR indi-
cator lit?
Is PLC mode dis-
played on Program-
ming Device?
Is PLC mode displayed
on Programming De-
vice?
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