PLC Simulator Online closes on 30 June 2027
PLC Simulator Online is moving to Rungs Studio
Rungs Studio is the new PLC simulator from the author of PLC Simulator Online. It's free, it runs in your browser, and your projects come with you.
Bring your project with you
One click, no account, nothing to install.
- 1
Open your project
Open PLC Simulator Online with the project you want to keep. Saved projects and shared links open there until 30 June 2027.
- 2
Press “Open this project in Rungs Studio”
The button is in the dark bar at the top of the simulator. If something cannot be carried over exactly, you see what will differ first.
- 3
Carry on in Rungs Studio
Studio opens in a new tab with your rungs and variables in it. The copy in PLC Simulator Online stays as it is until the simulator closes.
What changes when you move
The same rungs run in both. Rungs Studio works more like a real PLC.
| Feature | PLC Simulator Online | Rungs Studio |
|---|---|---|
| Languages | Ladder Diagram | Ladder Diagram and Structured Text |
| Ladder instructions | 26 | About 70 |
| Data types | Bool, Number, Timer, Counter | BOOL, SINT, INT, DINT, REAL, STRING, TIMER, COUNTER |
| Arrays | No | Yes, up to 8,192 elements |
| Bits of an integer | No | Yes: Word.0 to Word.31, each usable as a BOOL |
| Running your program | Start and stop | Start, pause, step one scan at a time, stop |
| Watching values | On the diagram | On the diagram, in a Trend chart and in an I/O panel |
| Tests | No | Yes: write tests for your logic and run them |
| AI assistant | No | Relay, which explains your logic and your errors |
| Saving and sharing | One project in the browser; sharing needs an account | Save to a file, export .L5X, share a link with no account |
| Learning | Documentation and a tutorial video | Over 100 exercises in 11 courses, with the first course free |
| Works offline | Yes | No |
Questions
Is PLC Simulator Online closing?
Yes, on 30 June 2027. Until then it works as usual, so there is time to bring your projects across.
Is Rungs Studio free?
Yes. The editor, the simulator and Relay, its AI assistant, are free. So is the Boolean Logic course. The other courses need a Plus plan.
Do I need an account?
No. You can build, run, save to a file and share a link without signing up.
What happens to my saved projects and shared links?
They open in PLC Simulator Online as before until 30 June 2027. To move one, open it there and press “Open this project in Rungs Studio”.
Will my project look the same?
The rungs are the same. Some names change: a timer’s Q becomes DN, and Set and Reset become Latch and Unlatch. If something cannot be carried over exactly, you are told before the project opens.
Does Rungs Studio work on a phone?
Yes. It runs in a phone’s browser as well as on a computer.
Does Rungs Studio work offline?
No. PLC Simulator Online does, until 30 June 2027.
Keep learning
Boolean Logic course ↗
Free exercises that check your answer, from a single contact up to the start/stop motor circuit.
The move, on YouTube ↗
The four-minute video from the top of this page, with chapters for each step.
PLC Simulator Online documentation
The Ladder Logic guides for PLC Simulator Online stay on this site.