Hello, I am learning about the ethercat protocol and using igh ehtercat master, but have a puzzle. I connected my slave and just start the igh master by using "ethercat start" command and no other user app run. then I use wireshark to capture packet, result like the following picture:
I know it is scaning slaves all the time, but how about this FPRD datagrame, I haven't see any write cmd to set the slave position to the slave register。 so, this is my puzzle, I need some tips, thank you in advance!
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