BECKHOFF EP1122: Error handling and diagnosis

Diagnostic LEDs

EP1122 - diagnostic LEDs 1:

LEDs for fieldbus diagnosis

LED Display State Description
LINK / ACT (ECAT IN / ECAT OUT /Port1/Port2) green off - no connection on the EtherCAT strand
on linked EtherCAT device connected
flashing active Communication with EtherCAT device

LED diagnostics EtherCAT state machine

LED Color Meaning
RUN green This LED shows the operating state of the Box:
off State of the EtherCAT state machine: INIT = initialization of the Box
Single flash State of the EtherCAT state machine: PREOP = function for mailbox communication and different standard-settings set
flashing State of the EtherCAT state machine: SAFEOP = verification of the sync manager channels and the distributed clocks.
Outputs remain in safe state
on State of the EtherCAT state machine: OP = normal operating state; mailbox-and process data communication is possible
flickering State of the EtherCAT state machine: BOOTSTRAP = function for Box firmware updates