Mitsubishi GOT 1000 GT16, User Manual

Page: 168 / 218

10 - 4
10.1 GOT Restoration Sheet
(2) Status of the GOT when it freezes (screen operation stopped)
(3) Status of the PLC CPU
Phenomenon Cause/status Action
(a) Switching to the utility
Enabled
Error code (system alarm):
( )
Example: 460 Communication unit error
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).
Disabled
The system alarm display function cannot be
used.
Proceed to (2)-(c).
(b) Executing of I/O check from the GOT utility
Communication error
Display details:
( )
Example: A message indicating the cause may be
a connection error was displayed.
Proceed to (2)-(c).
No error
The hardware such as a communication interface
has no error.
Proceed to (3) Status of the PLC CPU.
(c) Objects not displayed on the monitor screen
Found
Details:
( )
Example: The numerical display object is not
displayed.
Proceed to (3) Status of the PLC CPU.
Not found
Phenomenon Cause/status Action
(a) PLC failure
Occurs always.
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
Proceed to the following.
10.2 Troubleshooting in Bus
Connection
Occurs sometimes.
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
Proceed to (4) GOT restoration
procedure.
Operates normally.