Rockwell Automation 22-COMM-C ControlNet Adapter - Manual (Page 108)

8-4 Troubleshooting
Net A and B Status Indicators Together
Status Cause Corrective Actions
Both LEDs are
Off. A reset occurred or there is no
power. Apply power to the drive (or adapter if
mounted in a DSI External Comms Kit).
Both LEDs are
steady Red. A link interface failed.
• Check media for broken cables, loose
connectors, missing terminators, etc.
• Power cycle or reset the adapter. If
the problem persists, contact
Allen-Bradley Drives Technical
Support.
LEDs are
alternating
Red/Green. The adapter is in self-test
mode. No action required. The adapter will exit
this mode when the self-test is
completed.
LEDs are
alternating
Red/Off. There is a bad node
configuration.
• Verify that all node addresses are
unique.
• Check the adapter’s configuration.
• Check media for broken cables, loose
connectors, missing terminators, etc.
• Power cycle or reset the adapter.
Net A or B Status Indicators Independently
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 adapter.
• Reset the controller.
• If the problem persists, contact
Allen-Bradley Drives Technical
Support.
One channel
LED is flashing
Red/Off. The channel is not receiving
network activity. Check media for broken cables, 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.