LEDs

| LED | Color | Meaning | |
|---|---|---|---|
| RUN | green | These LEDs indicate the terminal's operating state: | |
| off | State of the EtherCAT State Machine: INIT = initialization of the terminal | ||
| flashing uniformly | State of the EtherCAT State Machine: PREOP = function for mailbox communication and different standard-settings set | ||
| flashing slowly | State of the EtherCAT State Machine: SAFEOP = verification of the Sync Manager channels | ||
| on | State of the EtherCAT State Machine: OP = normal operating state; mailbox and process data communication is possible | ||
| flashing rapidly | State of the EtherCAT State Machine: BOOTSTRAP = function for terminal firmware updates | ||
| ACT | green | Signal exchange LIGHTBUS | |
| Err | red | LIGHTBUS error | |