Rockwell Automation 1747-SCNR ControlNet Scanner Module Reference Manual - Manual (Page 46)

Publication 1747-RM623D-EN-P - June 2006
5-2 Troubleshoot
Apply Chassis Power When you apply chassis power, the module address and status display
cycles through the following mnemonics:
1 . POST - The 1747-SCNR runs Power On Self Test.
2. 1 1 1 1 , 2222, etc. - The 1747-SCNR is executing its startup
sequence.
3. The 1747-SCNR firmware version is displayed temporarily after
startup.
4. A#nn (where nn = ControlNet node address) then I/O or I/OX
(based on the number of connections configured and
established) then
IDLE or RUN (based on the scanner mode).
Alphanumeric Display The four character alphanumeric display provides you with additional
visual information about the current operational status of the module.
See the tables that describe problems that may occur while using your
1747-SCNR module, the probable causes, and the recommended
action.