Codesys-MCP-Master, 3 stars: one MCP server drives every installed CODESYS version with 132 tools
An agent can write function blocks, compile and fix errors, rename variables across a project, run a simulation and download to a PLC, picking the right CODESYS version from the project file. Whether a download or PLC write needs a person's approval is set in the AI client, not the server, so that setting is the one to get right.
For controls engineers on CODESYS-based PLCs: hand off the routine edit, compile and release chores while keeping each tool call visible.