Table of Contents
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Troubleshooting Flowcharts
Fatal Error Check
168
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RUN indicator not lit.
No
Is the ERR indi-
cator lit?
Yes
Determine the cause
of the error with a
Programming Device.
Is PLC mode displayed
on Programming De-
vice?
Yes
Is a fatal error
displayed?
No
Switch to RUN or
MONITOR mode.
Is the RUN
indicator lit?
Yes
End
Yes
Is PLC mode dis-
played on Program-
ming 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 8-4
No
Replace the CPU
Board.
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Table of Contents
Troubleshooting
