Rockwell Automation RECOMM-CNET ControlNet Communications Module - Manual (Page 98)

8-4 ControlNet Communications Module
8.1.3 NET A and B Together
Table 8.3 – NET A and B Together: State Definitions
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. • No action required. The module
will exit this mode when the
self-test is completed.
LEDs are
alternating
red/off There is a bad
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.