Rockwell Automation RECOMM-CNET ControlNet Communications Module - Manual (Page 99)

Troubleshooting the ControlNet Module and Network 8-5
8.1.4 NET A and B Independently
Table 8.4 – NET A and B Independently: State Definitions
Status Cause Corrective Actions
One
channel
LED is
steady off That channel is
disabled or not
supported. • Program the network for
redundant media, if required.
One
channel
LED is
flashing
red/green There is an invalid
link configuration
for that channel. • Power cycle or reset the
module.
• Reset the controller.
• If the problem persists, contact
Rockwell Automation support.
One
channel
LED is
flashing
red/off The channel is not
receiving network
activity. • Check media for broken calbes,
loose connectors, missing
terminators, etc.
One
channel
LED is
flashing
green/off A temporary
channel error has
occurred, or the
channel is in listen-
only mode. • Verify the controller is present
on the network and working.
One
channel
LED is
steady
green Normal operation
for that channel. • No action required.