5 EtherCAT
General Considerations
18 Lenze · Inverter i550 - Cabinet · Ethernet Manual · 0.1 EN · 12/2015
5 EtherCAT
5.1 General Considerations
EtherCAT is supported from SW Version 02.00
5.1.1 Network topology
An EtherCAT frame is sent through a pair of wires from the master to the slaves. The frame is forwarded from
slave to slave until it has passed through all the devices. Finally, the last slave returns the frame to the master
through a second pair of wires. In this way, EtherCAT always forms a logic ring topology, irrespective of the to-
pology used.
Line topology
The devices are interconnected successively.
In order to ensure trouble-free operation, it is required to assign and wire the EtherCAT inputs (IN) and EtherCAT
outputs (OUT) correctly!
The receiving line is plugged into socket X2x6 (IN), the forwarding line into socket X2x7 (OUT).
The direction of data transmission is from the master to the slaves.
The termination of the last EtherCAT node is effected automatically by the slave.
Switch topology
The wiring can also be carried out in a star structure via an appropriate switch. For this, observe the additional
runtimes.
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