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6 TROUBLESHOOTING
1
Is the "L RUN" LED lit?
station number
setting switches properly
(not overlapping with
other stations)?
Corresponding module malfunction
( station number setting switch )
*1 Check for a short, reversed connection, wire breakage, terminal resistor, FG connection,
overall distance and station-to-station distance.
6 - 6
2
N
Y
Are the
station number
setting switches properly
(not overlapping with
other stations)?
Y
Is the transmission speed
setting correct?
Y
Is the communication
cable wired properlly ?
*1
Y
Corresponding module malfunction
( Transmission speed setting switch )
Are the
N
Y
N
Set the station number
setting switches properly
N
Set the correct transmission speed
Turn on the power again
N
Wire the communication
cable properly
Set the station number
setting switches properly
End
MELSEC-A
Turn on the power again
Turn on the power again
3
6 - 6
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