EtherCAT adapter needs to be updated with PLC.
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EtherCAT is a real-time bus system based on Ethernet technology. Inputs and outputs, sensors, drives and displays are all accessed directly via EtherCAT
https://infosys.beckhoff.com/english.php?content=../content/1033/tc3_io_intro/1258020619.html&id=2597873903779157582
Download the sample from the link given above.
Next, let’s try to understand persistent data https://www.hemelix.com/plc/twincat-3-database-server/
Ask questions related to Hemelix sample code and design at Google group https://groups.google.com/g/hemelix
