Beckhoff EL3773, Documentation

Page: 149 / 179

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