Allen-Bradley PowerFlex 20-comm-c FRN 1. Series, User Manual

Page: 102 / 159

7-4 Troubleshooting
Net A and B Together
Status Cause Corrective Actions
Both LEDs are
off A reset occurred or there is
no power.
•
Apply power to the module
Both LEDs are
steady red. A link interface failed
•
Check media for broken cables, loose
connectors, missing terminators, etc.
•
Power cycle or reset the module. If the
problem persists, contact Rockwell
Automation support.
LEDs are
alternating red/
green. The module is in self-test
mode
•
None. The module 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 module’s configuration.
•
Check media for broken cables, loose
connectors, missing terminators, etc.
•
Power cycle or reset the module.
Net A or B 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 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 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.
•
None.
20COMM-UM003A-EN-P.book Page 4 Wednesday, November 7, 2001 3:46 PM