9 Troubleshooting and Maintenance
9-12
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
*1 The 7-segment indicator will alternate between the Unit's node address and the code given in the tables in this section.
*2 The NS indicator will flash red if the error occurs during remote I/O communications, otherwise the indicator will be OFF.
Indicators Error
category
Error Likely cause DeviceNet Unit
response
Error
log
(Hex)
MS NS 7-seg-
ment
*1
-OFF or
Red
(flash-
ing)
*2
E0 Network Network
power sup-
ply error
The communications
power supply is not being
supplied properly from the
network.
Records the error in the
error log.
As long as power is not
being supplied remote I/O
communications will
remain stopped and errors
will be returned in
response to requests for
message transmissions.
The indicator status, scan-
ning, and message pro-
cessing will return to
normal when the network
power supply is restored,
although scanning will not
resume if the DeviceNet
Unit is set to stop remote
I/O communications when
a communications error
occurs.
0341
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