Diagnostic Leds - Beckhoff EL3773 Documentation

7.2

Diagnostic LEDs

Fig. 171: EL3773
LED Color Meaning
Run green This LED indicates the terminal's operating state.
off
flashing
single
flash
on
flickering State of the EtherCAT State Machine: BOOTSTRAP = function for terminal
L1-L3 red off
Error
on
I - I red off
L1 L3
Error
on
EL3773
State of the EtherCAT State Machine: INIT = terminal initialization
State of the EtherCAT State Machine: PREOP = function of mailbox
communication and variant standard settings
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
firmware updates
No measuring error in the voltage circuit
Measuring range exceeded in the voltage circuit
No measuring error in the current circuit
Measuring range exceeded in the current circuit
Version: 2.5
Diagnosis
149