Rockwell Automation 1756-Lx_Mx ControlLogix Controller and Memory Board Installation Instructions - 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
Update the Controller .
If the controller is not a new controller (previously in operation),
a major fault occurred. See
Clear a Major Fault .
Solid red The controller detected a nonrecoverable fault, so it cleared the
project from memory. See
Clear a Nonrecoverable Fault .
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