Rockwell Automation Allen-Bradley ControlNet 1734-ACNR User Manual page 125

For logix5000 control systems
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Table 8.2 1756-CN2 and 1756-CN2R Network Channel Status Indicators
If Both Channel
It Means
Status Indicators Are
Off
No power
Steady red
Faulted module
Alternating red/green
Self-test
Alternating red/off
Incorrect node configuration
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.
This table describes the 1756-CN2 and 1756-CN2R network channel status
indicators.
Troubleshoot Your ControlNet Communication Modules
Take This Action
Apply power.
1. Cycle power to the module.
2. If fault persists, contact your Rockwell Automation
representative or distributor.
None
Check network address and other ControlNet configuration
parameters.
Take This Action
Program network for redundant media, if necessary.
None
None unit will self-correct or
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.
Publication CNET-UM001C-EN-P - November 2005
8-5
(1)
.

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