The Status LEDs indicate:
Run status of the Control Station
CompactFlash card status
Figure 6 Status LEDs
Unit is in the boot loader, no valid configuration is loaded.
Unit is powered and running an application.
No CompactFlash card present.
CompactFlash card present.
CompactFlash being checked.
Unit is writing to the CompactFlash, either because it is storing data, or
because the PC connected via the USB port has locked the drive.
Incorrectly formatted CompactFlash card present.
A tag is in alarm state.
Valid configuration is loaded and no alarms are present.
900 Control Station User Guide