Rockwell Automation 1785-L20C_L40C QUICK START CONTROLNET PLC-5 - Manual (Page 25)

4–5 Troubleshoot the Processor System
Publication 1785-10.7 – October 1997
Indicator Color Channel Mode Description Probable Cause Recommended Action
A or B Green
(steady) Remote I/O
Scanner Active Remote I/O link, all
adapter modules are
present and not faulted Normal operation No action required
Remote I/O
Adapter Communicating with
scanner
DH+ Processor is transmitting or
receiving on DH+ link
Green
(blinking
rapidly or
slowly) Remote I/O
Scanner At least one adapter is
faulted or has failed •
Power off at
remote rack
•
Cable broken
•
Restore power to
the rack
•
Repair cable
DH+ No other nodes on network
Red
(steady) Remote I/O
Scanner
Remote I/O
Adapter
DH+ Hardware fault Hardware error
•
Turn power off, then
on.
•
Check that the
software
configurations match
the hardware set-up.
•
Replace the
processor.
Red
(blinking
rapidly or
slowly) Remote I/O
Scanner Faulted adapters detected
•
Cable not
connected or
is broken
•
Power off at
remote racks
•
Repair cable
•
Restore power to
racks
DH+ Bad communication on DH+ Duplicate
node detected Correct station address
Off Remote I/O
Scanner
Remote I/O
Adapter
DH+ Channel offline Channel is not
being used Place channel online if
needed
Using the DH+/RIO
Status Indicators