User manual

Troubleshooting
Communication Channel 5-5
Troubleshooting – PLC-5/40L and PLC-5/60L Processor (Only)
Communication Channel
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Indicator Color
Channel
Mode
Description Probable Cause Recommended Action
2 green
(steady)
extended
local I/O
scanner
active extended
local I/O link, all
adapter modules
are present and
not faulted
normal operation none
green
(blinking
rapidly or
slowly)
extended
local I/O
scanner
at least one
adapter is faulted
or failed
• power off at extended local
I/O rack
• communication fault
• cable broken
• Restore power to the rack
• Restart adapters using the
processor restart lockout
push-button
• Repair cable
BATT
PROC
FORCE
COMM
PROG
RUN
R
E
M