Mounting and cabling
EP4374
21
Version: 2.3
3.2.2.2
Status LEDs
Fig. 11: EtherCAT Status LEDs
L/A (Link/Act)
A green LED labelled "L/A" is located next to each EtherCAT socket. The LED indicates the communication
state of the respective socket:
LED
Meaning
off
no connection to the connected EtherCAT device
lit
LINK: connection to the connected EtherCAT device
flashes
ACT: communication with the connected EtherCAT device
Run
Each EtherCAT slave has a green LED labelled "Run". The LED signals the status of the slave in the
EtherCAT network:
LED
Meaning
off
Slave is in "Init" state
flashes uniformly
Slave is in "Pre-Operational“ state
flashes sporadically
Slave is in "Safe-Operational" state
lit
Slave is in "Operational" state
A description of the EtherCAT slave states can be found under
https://infosys.beckhoff.com/content/1033/ethercatsystem/1036980875.html?id=8582353789396071752