This post closes a practical loop: a minimal host/controller setup you can actually run.
Goal
Host PC talks to a soft PLC (CODESYS Control Win). The application exposes axes and variables. The host starts, stops, and exchanges data.
Pieces
| Piece | Role |
|---|---|
| Host PC | UI / scripts |
| CODESYS runtime | Soft PLC |
| Application | PLC_PRG + axes |
Device setup
Create a standard project, add SoftMotion Win (or Control Win), define the program and axis objects, then compile and download.
Simulated axes
The sample uses FB_SimAxis: the block parses commands and ramps position. The motion is real in the program; the “axis” is simulated. Good enough to prove the host/controller loop before touching hardware.
What you get
- Download and start from the host
- Read/write variables
- A base for the later CODESYS AI and axes posts
This is the closed loop the rest of the CODESYS series builds on.
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