Hitachi NJI-350B - Manual (Page 284)

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
13 12 11 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