Beckhoff ELX3152 Operating Manual page 28

Mounting and wiring
LED display
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 red General error of the A/D converter
Error Ch 1 red Fault indication in the event of broken wire or undershooting or overshooting of the
measuring range for channel 1
Error Ch 2 red Fault indication in the event of broken wire or undershooting or overshooting of the
measuring range for channel 2
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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: 2.0.0 ELX3152 and ELX3158