42 Rockwell Automation Publication CNET-IN005A-EN-P - May 2011
Appendix A 1756 ControlNet Status Indicators
Network Channel Status Indicators
Table 2 - Network Channel Status Indicators A and B
Status Description
Off There is no power.
Steady red Unit has faulted.
Cycle power or reset unit. If the fault persists, contact a Rockwell Automation representative or
distributor.
Alternating red/green A self-test is being conducted.
Alternating red/off Node has been configured incorrectly.
Check network address and other ControlNet configuration parameters.
Table 3 - Network Channel Status Indicators A or B
Status Description
Off Channel has been disabled.
Program the network for redundant media, if required.
Steady green This is normal operation.
Flashing green/off Temporary errors exist. The unit will self-correct.
Node is not configured to go online.
Make sure that the configuration manager node (keeper) is present and working and the selected
address is not greater than the maximum unscheduled node address (UMAX).
(1)
Flashing red/off A media fault exists.
Check media for broken cables, loose connectors, or missing terminators.
No other nodes are present on the network.
Add other nodes to the network.
(1) The configuration manager node (keeper) is the node responsible for distributing ControlNet configuration data to all nodes on the network.
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