LED indicators - meanings

LED	Color	Meaning
RUN	green	off	State of the EtherCAT State Machine: INIT = initialization of the terminal
		flashing	State of the EtherCAT State Machine: PREOP = function for mailbox communication and different standard-settings set
		single flash	State of the EtherCAT State Machine: SAFEOP = check the channels of the Sync Manager and the Distributed Clocks (if supported)
		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 firmware updates of the terminal

LED	Color	Meaning
OK (1…n)	green	No error
	red	Error display, along with error bit in the status, for Measuring range error (not for underrange/overrange!) Set measuring type is not calibrated (see CoE object 0x80nF PAI Vendor Calibration Data) Processor overload (see CoE object 0xF900 PAI Info Data) ADC in "saturation" Analog circuit "in overload", over voltage detected at inputs; see section "StartUp - what is the action for...“ and notes in section ”Common technical data”. Oversampling Error in Synchron Mode
	flashing	Active self‑test of terminal; see chapter ELM Features/ Self-test and self-test report
	off	No operation