Rockwell Automation Allen-Bradley ControlNet 1734-ACNR User Manual page 139

Table 8.8 1788-CNC, 1788-CNCR and 1788-CNF Module and I/O Status Indicators
If The Module It Means
Status (MS)
Indicator Is
Off No power
Host is faulted
Host is holding daughtercard in reset
Steady red Major fault
Flashing red Minor fault
Firmware update in progress
Node address switch change – The daughtercard's
node address switches may have been changed
since power-up.
I module firmware
Duplicate node address – The daughtercard's node
address duplicates that of another device.
Steady green Connections established
Flashing green No connections established
Flashing red/green Module is performing self-diagnostics.
If The I/O Status It Means
(IO) Indicator Is
Always off
This table describes the 1788-CNC, 1788-CNCR and 1788-CNF module and
I/O status indicators.
Troubleshoot Your ControlNet Communication Modules
Take This Action
Apply power.
Make sure that the daughtercard is firmly seated in the slot.
1. Cycle power.
2. If the indicator remains off, replace the daughtercard
or the host.
1. Cycle power.
2. If the problem persists, replace the daughtercard.
No action required (firmware update in progress.)
No action required (firmware update in progress.)
Change the node address switches back to the original
setting. The module will continue to operate properly.
Update module firmware with ControlFlash Update utility.
1. Remove power.
2. Change the node address to a unique setting.
3. Reapply power.
None
Establish connections, if necessary.
Wait briefly to see if problem corrects itself.
If problem persists, check the host. If the daughtercard
cannot communicate with the host, the card may remain in
self-test mode.
Take This Action
This LED is on during the LED portion of the self-tests.
Publication CNET-UM001C-EN-P - November 2005
8-19