Rockwell Automation 1785-Lx0C15 ControlNet PLC-5 Programmable Controllers Quick Start - Manual (Page 27)

Publication 1785-QS006C-EN-P - April 2002
Troubleshoot the Processor System 4-5
Use the DH+/RIO
Status Indicators
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