Mitsubishi GOT 1000 GT16, Руководство пользователя

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10.2 Troubleshooting in Bus Connection
10.2.3 Specific example of troubleshooting
Taking the following system as an example, troubleshooting is shown when PLC CPU error occurred. (When QnASCPU
and the extension base unit are used)
PLC
(main base unit)
GOT 1) GOT 2)
PLC
(extension base unit)
Bus connection
cable Bus connection
cable
Extension cable
Start
Check the error code/step appearing on the PLC CPU.
(Obtain the status of the error and the location where the error occurs.)
The error occurs further (not on the GOT 2) (bus connection unit)).
The SP. UNIT DOWN message appears on PLC CPU.
Turn off the power of the GOT.
Turn off the power of the PLC.
Replace the faulty PLC CPU with a new one.
The error occurs further (not on PLC CPU).
Turn off the power of the GOT.
Turn off the power of the PLC.
Disconnect the bus-connection cable from the GOT 2) at IN side
(to further locate the error positions).
Turn on the power of the PLC.
Turn on the power of the GOT.
Turn off the power of the GOT.
Turn off the power of the PLC.
Turn on the power of the PLC.
Turn on the power of the GOT.
Disconnect the bus-connection cable from the GOT 1) at OUT side
(to further locate the error positions).
Turn on the power of the PLC.
Turn on the power of the GOT.
The error will not occur.
The bus-connection cable connecting the GOT 1) to the GOT 2) is judged faulty.
Replace the faulty bus-connection cable with a new one.
End