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9. Troubleshooting
9-6
9.2.4 Error code E01-01 : Communication failure in Fnet
E01-02 : Communication failure in Mnet
E01-03 : Communication failure in FOU group
Are there
duplicated station numbers in
entire network?
Is
terminal resistance
connected at both terminal
of network?
Network check
Yes
No
Is it electric
communication module?
Check numbers used and
connection method of EOC,
repeater, and active coupler.
Does cable length exceed
specification range?
No
No
No
Are network cables
combined?
No
Are
Tx/Rx connectors
connected to right
position?
Is using
method of EOC,
repeater, and active
coupler correct?
Connect terminal resistance
at both terminal of network.
Reduce the cable length
within specified range. Use
repeater if cable length is
longer than specified range.
Change the station number so
as not to be duplicated.
Use single type of specified
cable.
Is the entire network a
closed circuit?
Check the entire network so
as not to be a closed circuit.
This is the hardware error of
communication module.
Contact Service station.
Connect TX cable to other’s
RX, and connect RX cable to
other’s TX.
No
No
A
End
A
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No