User manual

Troubleshooting
Communication Channel 5-4
Enhanced, Ethernet,
and ControlNet PLC-5
processors only
troubleshooting – Enhanced, Ethernet, and ControlNet PLC-5 processor communication channel continued...
Indicator Color Channel Mode Description Probable Cause Recommended Action
A or B
(continued)
red
(steady)
RIO scanner
RIO 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)
RIO scanner faulted adapters detected • cable disconnected or
broken
• power off at remote
racks
• Repair cable
• Restore power to racks
DH+ bad communication on
DH+
duplicate node detected Correct station address
off RIO scanner channel off-line channel is not being used Place channel online if needed
RIO adapter
DH+
A
A
B