CODESYS Features — EtherCAT Firmware Update

This post explains how to update EtherCAT slave firmware in a CODESYS system.

Firmware

EtherCAT stations split into masters (controllers) and slaves (drives, and so on). Update methods differ.

Kind	How	Who runs it
Master application (.app)	IDE download, or replace the boot application	CODESYS runtime
Slave firmware	FoE / vendor tools over EtherCAT	Master + slave

FoE upgrade states

Idle → FoE connect → Transfer firmware → Checksum verify → Reboot / apply.

Three-party sequence

Master/IDE, controller, and slave coordinate the transfer and restart.

Controller-side state machine

IDLE → PREPARE → TRANSFER → VALIDATE → APPLY.

Notes

• Match firmware to the exact slave model
• Keep the bus stable during transfer
• Plan for reboot: axes will drop until the slave returns