QUICK START CONTROLNET PLC-5
4–2 Troubleshoot the Processor System
Publication
1785-10.7 – October 1997
Recommended ActionProbable CauseDescriptionColorIndicator
FORCE
Amber
(steady)
SFC and/or I/O forces
enabled
Normal operation No action required
Amber
(blinking)
SFC and/or I/O forces
present but not enabled
Off SFC and/or I/O forces
not present
COMM
Off No transmission on
channel 0
Normal operation if
channel is not
being used
Green
(blinking)
Transmission on
channel 0
Normal operation if
channel is being used