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Mounting and cabling
4.3.2
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
4.3.3
Cables
For connecting EtherCAT devices only shielded Ethernet cables that meet the requirements of at least
category 5 (CAT5) according to EN 50173 or ISO/IEC 11801 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
20
Version: 1.4
EP3752-0000
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