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FX2N-64CL-M CC-Link/LT Master Block
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.
Data link status
When an abnormality
has occurred in the
master station PLC,
the PLC is stopped.
(The data link in the
entire system is
continued.)
When a remote station becomes
abnormal (by data link error, etc.)
(The data link in the entire system is
continued.)
When the power is interrupted in a
remote station (The data link in the entire
system is continued.)
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.
Remote input Remote output
FX
1N
Program
error
FX
,
2N
FX
2NC
FX
1N
CPU
FX
,
2N
error
FX
2NC
Clears inputs
from a remote
station in the
abnormal
status.
Clears inputs
from a remote
station where
the power is
interrupted.
Status of each station
Master station
--
Holds the status.
--
Clears.
--
Clears.
--
Clears.
Continues the
operation.
Continues the
operation.
Troubleshooting 12
Remote station
Input
Output
Holds the
status.
Continues the
Clears.
operation.
(Input LED is
Clears.
lit.)
Clears.
Continues the
operation, but
Depends
disables data
on the
transfer to the
DIP
master station.
switch
(Input LED is
status.
lit.)
Depends on
Turns
the external
OFF all
signal.
points.
12-1
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