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Here’s a quick review of searching for (typically related to TwinCAT 2 from Beckhoff):
The TC2-EtherCAT library is a TwinCAT 2 function library that provides EtherCAT master configuration, diagnostics, and control function blocks (e.g., ECATInit , ECATReset , ECATRead , ECATWrite ). It’s essential for custom EtherCAT handling beyond the automatic master configuration in System Manager.