Mitsubishi FX2N-64CL-M, User Manual

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Troubleshooting 12
12-1
12. Troubleshooting
12.1 Status of each station during abnormal operation
The table below shows the status of each station when an abnormal operation has occurred.
Holds the status.
Holds the ON/OFF status just before abnormality occurrence.
Continues the operation.
Executes the same operation as that in the normal status even if abnormality has occurred.
Clears.
Turns OFF inputs or outputs when abnormality has occurred.
If monitoring a remote station and a program error has occurred in the master station PLC,
inputs on the monitoring device may turn ON and OFF repeatedly. When the program error is
cleared, the inputs will return to their correct state.
Data link status
Status of each station
Master station Remote station
Remote input Remote output Input Output
When an abnormality
has occurred in the
master station PLC,
the PLC is stopped.
(The data link in the
entire system is
continued.)
Program
error
FX
1N
-- Holds the status.
Continues the
operation.
(Input LED is
lit.)
Holds the
status.
FX
2N
,
FX
2NC
,
FX
3U
,
FX
3UC
-- Clears. Clears.
CPU
error
FX
1N
-- Clears. Clears.
FX
2N
,
FX
2NC
,
FX
3U
,
FX
3UC
-- Clears. Clears.
When a remote station becomes
abnormal (by data link error, etc.)
(The data link in the entire system is
continued.)
Clears inputs
from a remote
station in the
abnormal
status.
Continues the
operation.
Continues the
operation, but
disables data
transfer to the
master station.
(Input LED is
lit.)
Depends
on the
DIP
switch
status.
When the power is interrupted in a
remote station (The data link in the entire
system is continued.)
Clears inputs
from a remote
station where
the power is
interrupted.
Continues the
operation.
Depends on
the external
signal. Turns
OFF all
points.
FX2N-64CL-M CC-Link/LT Master Block