Mitsubishi Electric SW0DNC-MNETH-B User Manual page 185

14 TROUBLESHOOTING
1)
Perform self-loopback tests for the
control station and first through last
stations.
Is there any station with error?
NO
Check the loop line using a station-to-
station test.
Replace the faulty cable.
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Replace the MELSECNET/H board
network module of the faulty station
among the control station and first through
last stations.
NO
Did the data link begin?
YES
Replace the MELSECNET/H board
network module of the faulty station.
NO
Did the data link begin?
Did the data link begin?
Consult with the dealer regarding the
problem.
REMARK
For the Q80BD-J71LP21-25, Q81BD-J71LP21-25 or Q80BD-J71LP21S-25 with the
communication speed set to 25 Mbps, mounting multiple boards with the same
network No. is not allowed. Doing so may cause errors at all stations at the time of
OS startup/shutdown or when resetting the board. If multiple boards with the same
network No. should be installed, set the communication speed to 10Mbps.
2)
YES
YES
YES
NO
MELSEC
3)
Complete
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