Omron CJ1W-DRM21, Operation Manual

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9 Troubleshooting and Maintenance
9-2
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
9-1 Troubleshooting with the DeviceNet
Unit Indicators
9-1-1 Determining Operating Status from the Indicators
Indicator status Network/Unit status Comments
MS NS 7-segment
OFF OFF OFF Initializing with CPU Unit Initialization processing with the CPU Unit is in
progress.
Restart the DeviceNet Unit if this status continues
for an extended period of time. Replace the CPU
Unit and/or DeviceNet Unit if the problem is not
corrected by restarting.
ON
(green) OFF Master's node
address
(flashing) Checking for node address
duplication The node address duplication check is performed
after initialization.
ON
(green) Flash-
ing
(green) Master's node
address
(flashing) Waiting for remote I/O com-
munications The Unit will have this status until remote I/O com-
munications are performed with the master or
slave function. (When both functions are operat-
ing, the Unit will have this status until remote I/O
communications are performed with either func-
tion.)
Master's node
address Waiting for message commu-
nications connection The Unit will have this status when both the master
and slave functions are disabled and the Unit is
waiting for a connection by message communica-
tions.
ON
(green) ON
(green) Master's node
address Remote I/O or message com-
munications in progress. This is the normal display when the master and/or
slave is active.
ON
(green) ON
(green) - - (flashing) Scan list operation in
progress. The scan list is being saved in flash memory or the
scan list is being cleared.