Mounting and cabling
EP31xx 35Version: 2.4
3.2.2 Status LEDs
Fig.13: 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
Description of the EtherCAT slave states
3.2.3 Cables
For connecting EtherCAT devices only shielded Ethernet cables that meet the requirements of at least
category5 (CAT5) according to EN50173 or ISO/IEC11801 should be used.
EtherCAT uses four wires for signal transmission.
Thanks to automatic line detection ("Auto MDI-X"), both symmetrical (1:1) or cross-over cables can be used
between Beckhoff EtherCAT.
Detailed recommendations for the cabling of EtherCAT devices
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