Chapter 13 Troubleshooting
13-9
(c) Operation stopped (RUN stopped)
During normal operation, the CPU suddenly stops (the RUN LED turns off).
NO
YES
NO
YES
131211
1F
Check the power supply
•
Instantaneous power failure
occurs
•
Power is shut off on the
expansion unit side
Contact our service department
if a fatal error occurs frequently
Turn the power off and turn it
back on
Check the program
Check parameters
Check I/O assignment
•
Parameter settings
•
Program congestion
•
Check I/O assignment
•
Duplicate use of the timer
counter
•
Retransfer of program
•
Connection with the expansion
connector
POWER LED is lit
(Power supply is
normal)
Fatal CPU error
Self-diagnostic error code
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