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Rockwell Automation 1785-L20C_L40C QUICK START CONTROLNET PLC-5 User Manual

Page 22

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4–2

Troubleshoot the Processor System

Publication 1785-10.7 – October 1997

Recommended Action

Probable Cause

Description

Color

Indicator

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