Mitsubishi Electric GOT2000 Series Hardware User Manual page 369

■Check of buzzer sound
Check Symptom
□ No buzzer sound
□ Continues to beep randomly.
□ Continues to beep in a particular
pattern.
□ Beeps continuously.
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
Cause/status
—
Buzzer sound:
• Example: The rhythm repeats as three beeps,
one beep, and two beeps.
When the read device of the system information
was set, the device was turned on and the Buzzer
Output signal was input.
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.
Corrective action
Proceed to the following.
Status of the GOT when it freezes (screen operation
stopped)
Check the setting of the read device.
If the Buzzer Output signal has no error, proceed to the
following.
Status of the GOT when it freezes (screen operation
stopped)
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
12 TROUBLESHOOTING
12.1 GOT Restoration Sheets
12
367