Lenze E94AYCET - Manual (Page 25)

Lenze · E94AYCET communication module (EtherCAT®) · Communication Manual · DMS 9.0 EN · 02/2014 · TD17
25
5 Installation
5.2 Electrical installation
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5.2.2 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 topology used.
Line topology
[5-4] 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 X246 (IN), the forwarding line into socket X247 (OUT).
The direction of data transmission is from the master to the slaves.

Tip!
The termination of the last EtherCAT node is effected automatically by the slave.
Switch topology
[5-5] Switch topology
The wiring can also be carried out in a star structure via an appropriate switch. For this, observe the
additional runtimes.
E94AYCET006
M = master
SD = slave device
M
SD SD SD
IN IN OUT IN OUT
E94AYCET007
M = master
S = switch
SD = slave device
M S
SD SD
M
IN IN