Mitsubishi Electric GOT2000 Series User Manual page 311

(4) Check of the screen display
Check
The screen is completely
□
black.
The screen is completely
□
white.
A line is displayed on the
□
screen.
□ Other faulty displays
□ The screen freezes.
(5) Check of buzzer sound
Check
□ No buzzer sound
□ Continues to beep randomly.
Continues to beep in a
□
particular pattern.
□ Beeps continuously.
■2. Status of the GOT when it freezes (screen operation stopped)
(1) Check of switching to the utility screen
Check Symptom
□ Possible
□ Impossible
(2) Executing the I/O check from the GOT utility
Check Symptom
□ Communication error
□ No error
Symptom
The LCD or basic software may be faulty.
The GOT hardware may be faulty.
The GOT hardware may be faulty.
Example: A vertical line is displayed.
The screen display is not updated and any
operation is unavailable.
Symptom
-
• 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
Perform the following in order.
1) Write the package data again.
2) Install the basic software again.
If the GOT is not restored by the above
operations, proceed to ■5. Faulty product
investigation.
Proceed to ■5. Faulty product investigation.
Proceed to (5).
Cause/status
Proceed to ■2. 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 ■2. Status of the GOT when it
freezes (screen operation stopped).
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 (2).
Proceed to (3).
Proceed to (3).
Proceed to ■3. PLC status.
12.1 GOT Restoration Sheets
Corrective action
Corrective action
Corrective action
Corrective action
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