Rockwell Automation 20-750-CNETC PowerFlex Coaxial ControlNet Option Module - Manual (Page 91)

Rockwell Automation Publication 750COM-UM003B-EN-P - November 2012 91
Troubleshooting Chapter 7
NET A and NET B Status
Indicators These red/green bicolor LEDs indicate the status for the ControlNet Channel A
and Channel B network connections. Depending on the state of these LEDs,
they should be interpreted together or independently.
Indicators Interpreted Together
When interpreted together, the NET A and NET B LEDs indicate the network
status as shown in the table below.
Indicators Interpreted Independently
When interpreted independently, the NET A and NET B LEDs respectively
indicate the network status as shown in the table below.
Status Cause Corrective Actions
Both indicators Off A reset occurred or the option module is not powered. Apply power to the drive.
Both indicators Steady
Red A link interface failed. • Check network coaxial media for broken cables, loose connectors,
missing terminators, and so forth.
• Cycle power to the drive, or reset the option module. If the problem
persists, contact Rockwell Technical Support.
Indicators Alternately
Flashing Red/Green The option module is in self-test mode. No action required. The option module will exit this mode after the
self-test is completed.
Indicators Alternately
Flashing Red/Off There is a bad node configuration. • Verify that all node addresses are unique.
• Check the option module’s configuration.
• Check network coaxial media for broken cables, loose connectors,
missing terminators, and so forth.
• Cycle power to the drive, or reset the option module.
Status Cause Corrective Actions
One channel indicator is
Steady Off That channel is disabled or not supported. Program the network for redundant media, if required.
One channel indicator is
Flashing Red/Green There is an invalid link configuration for that channel. • Cycle power to the drive, or reset the option module.
• Reset the controller.
• If the problem persists, contact Rockwell Technical Support.
One channel indicator is
Flashing Red/Off The channel is not receiving network activity. Check network coaxial media for broken cables, loose connectors,
missing terminators, and so forth.
One channel indicator is
Flashing Green/Off A temporary channel error has occurred, or the
channel is in ‘listen-only’ mode. Verify that the controller is present on the network and working.
One channel indicator is
Steady Green Normal operation for that channel. No action required.