Rockwell Automation 1747-KFC15 SLC500 CONTROLNET RS-232 USER MANUAL - Manual (Page 34)

5-2 Troubleshooting the KFC15 Module
1747-5.34 - June 1998
The following terms are used to describe the state of the LEDs:
solid - on continuously in the defined state
flashing - each LED alternates between the two defined states (or with
OFF if only one state is defined). This only applies to a single LED
viewed independently of the other. If both ControlNet LEDs are flashing,
they flash together (in phase).
railroad - both LEDs alternate between the two defined states at the same
time. This only applies to both ControlNet LEDs when viewed together.
The two LEDs are always in opposite states (out-of-phase).
flickering - intermittent on/off between the two states, often in an erratic
pattern
LED State Probable Cause Recommended Action
Channels A
and B
(viewed
together) OFF No power or reset
SOLID RED Failed unit Check network setup then cycle
power to the KFC15 module. If
the fault persists, contact your
authorized Allen-Bradley
representative or distributor.
RAILROAD RED -
GREEN Self test None
RAILROAD RED -
OFF Incorrect node
configuration
(duplicate node, ID,
etc.)
Check network address and
other ControlNet configuration
parameters.