| Feature | Description | | :--- | :--- | | | Each datagram includes a 16-bit counter; each node increments it if operation succeeds – instant mismatch detection | | Link status per port | Each slave’s PHY reports up/down | | Loopback detection | Master can detect ring opens | | Register diagnostics | Each slave exposes error counters, temperature, voltage (if implemented) | | Distributed Clock drift | Monitored automatically |
The core innovation of EtherCAT is its mechanism. Unlike standard Ethernet, where a packet is received, decoded, and then processed by each node, an EtherCAT telegram passes through each slave device sequentially. ethercat
Unlike standard Ethernet or most other fieldbuses where each node receives a frame, copies the data, and regenerates a new frame (store-and-forward), EtherCAT uses a with processing on the fly . | Feature | Description | | :--- |