Lenze EtherCAT control technology Manuel d'utilisateur Page 17

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DMS 3.1 EN 01/2011 TD17 L 17
Control technology | EtherCAT communication manual
The Lenze control system with EtherCAT
Brief description of EtherCAT
4.1.2 Structure of the EtherCAT bus system
Basic structure
Physical structure
An EtherCAT master can communicate with one or more nodes ("slaves").
Internally, the EtherCAT bus has a ring topology. Since Ethernet cables are provided
with a going and a return conductor within one cable, for the installer the topology
seems to be a line. The last slave closes the ring.
Switches, hubs or other infrastructure components known from the Ethernet standard
must not be used because they impair the real-time performance.
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