Rockwell Automation 1756-Lx_Mx ControlLogix Controller and Memory Board Installation Instructions User Manual
Page 37
ControlLogix Controller and Memory Board 37
Publication
1756-IN101L-EN-P - June 2008
RS232
Off
There is no activity.
Solid
green
Data is being received or transmitted.
BAT
Off
For a Series A controller, the controller does not show this
indication.
Solid
green
For a Series B controller, during power-down, the controller is
saving the project to its internal nonvolatile memory. If the BAT
status indicator is solid red before you turn off the power, the
BAT status indicator remains solid red even during the save.
Solid red
If the battery is not installed, install a battery. If the battery is
95% or more discharged, replace the battery.
OK
Off
No power is applied. When ready, turn on power to the
controller.
Flashing
red
If a new controller (just out of the box), the controller requires a
firmware update. See
If the controller is not a new controller (previously in operation),
a major fault occurred. See
.
Solid red
The controller detected a nonrecoverable fault, so it cleared the
project from memory. See
Solid
green
The controller is ok.
Flashing
green
The controller is storing or loading a project to or from
nonvolatile memory. If the controller has a CompactFlash card,
leave the card in the controller until the OK status indicator turns
solid green.
Indicator
Status
Description