is it possible to read and send data to few devices connected in series using EtherCAT ? I was searching in documentation but i didn't find it.
Thank much for any help
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Not an expert here, but with some insights.
With ref to: https://en.wikipedia.org/wiki/EtherCAT
If you read the initial paragraphs, and then continue through
I believe you will have all the answers.
As I understand; EtherCAT uses the standard Ethernet hardware (for availability and price), sends standard TCP/IP frames but doesn't use all the available data in the frames. In the devices, the frame handling appears to be in hardware - again for speed - but as the devices may be e.g. encoders it also is a plus to not need code taking up space in the often small memory layouts.