Advantech AMAX-4800 Series, Руководство пользователя

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3 AMAX-4800 User Manual
Chapter 1
Introduction
Figure 1.2 EtherCAT Protocol
EtherCAT datagrams are processed before the complete frame is received.
Encase the data is invalid, the frame check sum (FCS) is set as “not valid” and the
slave does not set the data as “valid” for local applications.
1.1.1.2 Topology
EtherCAT supports various network topologies, including line, tree, ring, and star
topologies. The line and tree topologies are more conducive to fieldbus applications
because they require fewer connections and use a comparatively simpler and more
flexible cabling scheme that does not necessitate switches or hubs.
Figure 1.3 EtherCAT Topology