Allen-Bradley PLC-5 User Manual page 351

Enhanced and ethernet plc-5 programmable controllers
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Indicator
Color
Description
FORCE
Amber
SFC and/or I/O forces enabled
(steady)
Amber
SFC and/or I/O forces present
(blinking)
but not enabled
Off
SFC and/or I/O forces not
present
COMM
Off
No transmission on channel 0
Green
Transmission on channel 0
(blinking)
Probable Cause Recommended Action
Normal operation
No action required
Normal operation
if channel is not
being used
Normal operation
if channel is being
used
Publication 1785-UM012D-EN-P - July 2005
Troubleshooting
F-3

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