The following table provides a description of the LED modes.
| LED label | LED color | Normal state | Description of LED states |
|---|---|---|---|
| POWER | Green | Steady on | Off steady = The controller has no power
On steady = Operating normally, and primary voltage powers the controller |
| FAULT | Red | Steady off | Blink - 2 Hz = Download or startup is in
progress. The controller is not ready for normal operation. Sensor bus devices are
offline. Rapid blink = Sensor bus communications problem Off steady = No faults On steady = Device fault or no application loaded |
| SA BUS (sensor bus) | Green | Blink - 2 Hz | Blink - 2 Hz = Data transmission. Normal
communication Off steady = No data transmission. Auto baud in progress On steady = Communication lost. Waiting to join communication ring |
| FC BUS (zone bus) | Green | Blink - 2 Hz | Blink - 2 Hz = Data transmission. Normal
communication Off steady = No data transmission. Auto baud not supported On steady = Communication lost. Waiting to join communication ring |
| EOL | Amber | Off | On steady = EOL is active Off steady = EOL is not active |