Mitsubishi Electric GOT SIMPLE Series Operation Manual page 109

Status of the GOT when it freezes (screen operation stopped)
■Check of switching to the utility screen
Check Symptom
□ Possible
□ Impossible
■Executing the I/O check from the GOT utility
Check Symptom
□ Communication error
□ No error
■Check of the objects that are not displayed on the monitor screen
Check Symptom
□ Found
□ Not found
PLC status
■PLC failure
Check Symptom
□ Always occurs.
□ Occurs sometimes.
□ Operates normally.
Cause/status
Error code (system alarm):
• Example: 460 Communication unit error
The system alarm cannot be used.
Cause/status
Display details:
• Example: A message indicating that the cause
may be a connection error has been displayed.
The hardware such as a communication interface
has no error.
Cause/status
Details:
• Example: The numerical display object is not
displayed.
Cause/status
CONTROL-BUS. ERROR, SP. UNIT LAY.
ERROR, or others is considered.
Error code (system alarm):
• Example: 1204 CPU H/W failure
The PLC CPU may be affected by noise or the
hardware may be faulty.
Frequency:
• Example: Once a month
Error code (system alarm):
• Example: 1204 CPU H/W failure
-
Corrective action
When the system alarm display function can be used,
take the action for the error code (system alarm)
displayed.
If the corrective action cannot be taken, proceed to the
following.
Executing the I/O check from the GOT utility
Proceed to the following.
Check of the objects that are not displayed on the
monitor screen
Corrective action
Proceed to the following.
Check of the objects that are not displayed on the
monitor screen
Proceed to the following.
PLC status
Corrective action
Proceed to the following.
PLC status
Corrective action
Proceed to the following.
Page 105 GOT Restoration Sheets
Proceed to the following.
GOT restoration procedure
11 TROUBLESHOOTING
11.1 GOT Restoration Sheets
11
107