User manual

Publication CNET-UM001C-EN-P - November 2005
8-14 Troubleshoot Your ControlNet Communication Modules
Network Channel Status Indicators
Channel B is only labelled on the 1769-L35CR controller. The 1769-L32C
controller only has channel A but uses the second indicator in some LED
patterns as described in (Table 10)Need CR.
This table describes the 1769-L32C and 1769-l35CR CompactLogix network
channel status indicators.
Table 8.6 1769-L32C and 1769-L35CR Network Channel Status Indicators
If Both Channel
Indicators Are
It Means Take This Action
Off A channel is disabled. Program network for redundant media, if necessary.
Steady green Normal operation is occurring. None
Flashing green/off Temporary network errors have occurred. 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.
The node is not configured to go online. Make sure the network keeper is present and
working and the selected address is less or equal to
the UMAX
(1)
.
(1)
UMAX is the highest node address on a ControlNet network that can transmit data.
Flashing red/off Media fault has occurred. 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.
No other nodes present on the network. Add other nodes to the network.
Flashing red/green The network is configured incorrectly. Reconfigure the ControlNet network so that UMAX >
the card’s node address.
If Either Channel
Indicator Is
It Means Take This Action:
Off You should check the module status indicator. Check the module status indicator.
Steady red The controller is faulted. 1. Cycle power.
2. If the fault persists, contact your Rockwell
Automation representative or distributor.
Alternating red/green The controller is performing a self-test. None
Alternating red/off The node is configured incorrectly. Check the card’s network address and other
ControlNet configuration parameters.