Observe the status LEDs on the front of the controller and see Table 1 to troubleshoot the controller.
| LED label | LED color | Normal LED state | Description of LED state |
|---|---|---|---|
| POWER | Green | On steady | Off steady = No supply
power or the controller’s polyswitch/resettable fuse is open. Check
output wiring for short circuits and cycle power to controller.
On steady = Power connected |
| FAULT | Red | Off steady | Off steady = No faults
On steady = Device fault; no application loaded; Main code download required, if controller is in Boot mode, or a firmware mismatch exists between the controller and the ZFR1811 Wireless Field Bus Router. Blink - 2 Hz = Download or Startup in progress, not ready for normal operation |
| SA/FC BUS | Green | Blink - 2 Hz | Blink - 2 Hz = Data
transmission (normal communication) Off Steady = No data transmission (N/A - auto baud not supported) On Steady = Communication lost, waiting to join communication ring |
| EOL | Amber | Off (Except on terminating devices) | On steady = EOL switch in
ON position Off steady = EOL switch in Off position |
| RELAY | Amber, Green | On steady green Off steady |
On steady green = Relay
switch is set to AUTO, and relay output is active ON On steady amber = Relay switch is set to OVERRIDE ON, and relay output is active ON Off steady = Relay switch is set to either AUTO or OFF and relay output is OFF |