Rockwell Automation 1769-L31 CompactLogix Controller Installation Instructions - Manual (Page 27)

1769-L31 CompactLogix Controller 27
Publication 1769-IN069C-EN-P - May 2008
RS-232 Serial Port Status Indicators (Channel 0 and 1)
Indicator Status Description
DCH0 Off Channel 0 is configured differently than the default serial
configuration.
Solid green Channel 0 has the default serial configuration.
CH0 Off No RS-232 activity.
Flashing green RS-232 activity.
CH1 Off No RS-232 activity.
Flashing green RS-232 activity.
CompactFlash Card Status Indicator
ATTENTION
Do not remove the CompactFlash card while the controller is reading from or
writing to the card, as indicated by a flashing green CF status indicator. This
could corrupt the data on the card or in the controller, as well as corrupt the
latest firmware in the controller.
Indicator Status Description
CF Off No activity.
Flashing green The controller is reading from or writing to the CompactFlash
card.
Flashing red CompactFlash card does not have a valid file system.