User manual

Publication CNET-UM001C-EN-P - November 2005
Troubleshoot Your ControlNet Communication Modules 8-19
This table describes the 1788-CNC, 1788-CNCR and 1788-CNF module and
I/O status indicators.
Table 8.8 1788-CNC, 1788-CNCR and 1788-CNF Module and I/O Status Indicators
If The Module
Status (MS)
Indicator Is
It Means Take This Action
Off No power Apply power.
Host is faulted Make sure that the daughtercard is firmly seated in the slot.
Host is holding daughtercard in reset 1. Cycle power.
2. If the indicator remains off, replace the daughtercard
or the host.
Steady red Major fault 1. Cycle power.
2. If the problem persists, replace the daughtercard.
Flashing red Minor fault No action required (firmware update in progress.)
Firmware update in progress No action required (firmware update in progress.)
Node address switch change – The daughtercard’s
node address switches may have been changed
since power-up.
Change the node address switches back to the original
setting. The module will continue to operate properly.
I module firmware Update module firmware with ControlFlash Update utility.
Duplicate node address – The daughtercard’s node
address duplicates that of another device.
1. Remove power.
2. Change the node address to a unique setting.
3. Reapply power.
Steady green Connections established None
Flashing green No connections established Establish connections, if necessary.
Flashing red/green Module is performing self-diagnostics. 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.
If The I/O Status
(IO) Indicator Is
It Means Take This Action
Always off This LED is on during the LED portion of the self-tests.