Rockwell Automation Allen-Bradley ControlNet 1734-ACNR User Manual page 130

8-10 Troubleshoot Your ControlNet Communication Modules
If Both Channel It Means
Status Indicators Are
Off No power
Steady red Faulted module
Alternating red/green Self-test
Alternating red/off One of the following:
If either channel It means:
status indicators are:
Off Channel disabled
Steady green Normal operation
Flashing green/off Temporary network errors
Node is not configured to go online
Flashing red/off Media fault
No other nodes present on network
Flashing red/green Incorrect node address
Incorrect network configuration
(1)
UMAX is the highest node address on a ControlNet network that can transmit data.
Publication CNET-UM001C-EN-P - November 2005
This table describes the 1756-CNB and 1756-CNBR network channel status
indicators.
Table 8.4 .1756-CNB and 1756-CNBR Network Channel Status Indicators
• incorrect node configuration
• duplicate ControlNet node address
Take This Action
Apply power.
1. Cycle power to the module.
2. If fault persists, contact your Rockwell Automation
representative or distributor.
None
Check the node address and other ControlNet configuration
parameters.
Take this action:
Program network for redundant media, if necessary.
None
1. Check media for broken cables, loose connectors,
missing terminators.
2. If condition persists, refer to the ControlNet Coax
Media Planning and Installation Manual, publication
and CNET-IN002
Make sure the network keeper is present and working and
the selected address is less or equal to the UMAX
1. Check media for broken cables, loose connectors,
missing terminators.
2. If condition persists, refer to the ControlNet Coax
Media Planning and Installation Manual, publication
and CNET-IN002
Add other nodes to the network.
1. Change the node address so that it is less than or
equal to UMAX.
2. Stop and restart the PCIC/PCICS driver in RSLinx
software.
Reconfigure the ControlNet network so that UMAX is greater
than or equal to the node address.
(1)
.