Ethercat ((better)) Jun 2026

This makes it the dominant choice for where deterministic latency matters more than raw bandwidth. Its weakness is the requirement for specialized slave hardware and a real-time capable master – but in return, it scales from a handful of I/O points to thousands with consistent, predictable timing.

Technically, this was achieved through a specific hardware chip (the ESC, or EtherCAT Slave Controller). This chip reads and writes data to the Ethernet frame as it streams past in nanoseconds. It eliminates the software latency that usually occurs when a processor has to "read" a message and decide what to do with it. ethercat

allows reordering of data without changing master code. This makes it the dominant choice for where