Proposal for final project - Cable Redundancy and Topology

1. Name: Tony-Chen, 陳禹同
Student ID: B10502034

3. Because EtherCAT equirements have two
network ports, they can use second
network port for ring closure at the
EtherCAT control system.
It’s the typical topology to EtherCAT.

5. Because of the ring topology, EtherCAT
has an advantage called “Cable
Redundancy”, which help EtherCAT to
avoid stopping transmission when cable
break.
In the absence of any fault, all the
EtherCAT slaves are reached in the
forward direction, and reached from the
secondary port in the reverse direction.

6. Master will check the data from two ports,
but process only the data from primary port.
In the fault, both frames contain a part of
the input data. The master has to combine
the data of both frames, and gets one
frame with all the input data until the cable
is fixed.

8. EtherCAT can use not only ring but also
other topologies, like tree, line and etc.
Slave can transmit frame back to the
master if it find the cable is break or not
connected. That’s because the Ethernet
port is full-duplex. That’s also why
EtherCAT can use other topologies.

9. • [1]
http://ethercat.org/forms/france2016/download/09_EtherCA
T_and_Industrie40_IoT_1609.pdf
• [2] https://www.ethercat.org/en/technology.html
• [3] https://www.slideshare.net/elmomc2012/multi-
axispositioncontrolbyether-catrealtimenetworking
• [4] https://www.pc-
control.net/pdf/032018/technology/pcc_0318_real-time-
communication_e.pdf
• [5] http://52.28.55.137/download/document/io/infrastructure-
components/CU2508en.pdf
• [6] https://www.youtube.com/watch?v=tYAl2jkaB8Q