Mitsubishi GT16 User Manual page 168

(2) Status of the GOT when it freezes (screen operation stopped)
Phenomenon
(a) Switching to the utility
Enabled
Disabled
(b) Executing of I/O check from the GOT utility
Communication error
No error
(c) Objects not displayed on the monitor screen
Found
Not found
(3) Status of the PLC CPU
Phenomenon
(a) PLC failure
Occurs always.
Occurs sometimes.
Operates normally.
10 - 4 10.1 GOT Restoration Sheet
Cause/status
Error code (system alarm):
(
Example: 460 Communication unit error
The system alarm display function cannot be
used.
Display details:
(
Example: A message indicating the cause may be
a connection error was displayed.
The hardware such as a communication interface
has no error.
Details:
(
Example: The numerical display object is not
displayed.
Cause/status
An error such as CONTROL-BUS. ERROR or SP.
UNIT LAY. ERROR may have occurred.
Error code (system alarm):
(
Example: 1204 CPU H/W fault
The PLC CPU may be influenced by noise or the
hardware may be faulty.
Occurrence frequency:
(
Example: Once a month
Error code (system alarm):
(
Example: 1204 CPU H/W fault
Action
When the system alarm display function
can be used, take the action for the error
) code (system alarm) displayed.
If the action cannot be taken, proceed to
(2)-(b).
Proceed to (2)-(c).
)
Proceed to (2)-(c).
Proceed to (3) Status of the PLC CPU.
)
Proceed to (3) Status of the PLC CPU.
Action
Proceed to the following.
10.2 Troubleshooting in Bus
)
Connection
)
Proceed to (4) GOT restoration
procedure.
)