Beckhoff ELX3312 Operating Manual page 29

LED displays
LED Color Meaning
Run green This LED indicates the terminal's operating state:
off
flashing State of the EtherCAT State Machine: PREOP = function for mailbox
single
flash
on
Error Ch 1 red The measurement value of channel 1 is in an invalid range of the characteristic curve.
Possible short circuit or wire breakage at channel 1.
Error Ch 2 red The measurement value of channel 2 is in an invalid range of the characteristic curve.
Possible short circuit or wire breakage at channel 2.
ELX3312 and ELX3314
State of the EtherCAT State Machine: INIT = initialization of the terminal or
BOOTSTRAP = function for firmware updates of the terminal
communication and different standard-settings set
State of the EtherCAT State Machine: SAFEOP = verification of the Sync
Manager channels and the distributed clocks.
Outputs remain in safe state
State of the EtherCAT State Machine: OP = normal operating state; mailbox
and process data communication is possible
Version: 1.3.0
Mounting and wiring
29