What is a virtual PLC?
A virtual PLC is a programmable logic controller that runs as software instead of dedicated hardware. The same IEC 61131-3 logic, the same scan cycle, the same behaviour, decoupled from the box it runs on.
A PLC, decoupled from the hardware
A physical PLC is a dedicated computer bolted to a panel. A virtual PLC is the same control program running as a software process on an industrial PC, a server, a container or an edge device. It executes Ladder, Structured Text, Function Block Diagram or Instruction List with a deterministic scan cycle, exactly like the hardware version.
Because the logic no longer depends on one vendor's box, a virtual PLC can be versioned like code, deployed remotely, duplicated across a fleet and rebuilt in minutes. That is the idea behind software-defined control.
Physical PLC, virtual PLC or simulator?
Three things that are easy to confuse, side by side.
Physical PLC
Dedicated hardware wired to local I/O modules or to remote I/O over an industrial network. Deterministic and rugged, but tied to one vendor, one panel and one firmware generation.
Virtual PLC
Real control logic running as software on general-purpose hardware or in a container. Same languages, same scan cycle, and it reaches the field through remote I/O over industrial networks, free to move between machines.
PLC simulator
Runs your compiled program on an emulated controller inside the editor, with a live debugger, for testing and learning. It touches no physical I/O and stops when the editor closes. A simulator answers 'does my logic work?'; a virtual PLC answers 'run my process'.
From the simulator to a fleet of virtual PLCs
Test the logic in the simulator first, then run the same program as a virtual PLC wherever it needs to live.
Test it in the simulator
The Simulator built into OpenPLC Editor and Autonomy Edge runs your compiled program on an emulated controller, with a live debugger. When the logic works, the same program deploys as a virtual PLC.
OpenPLC Editor
Build your program in the free OpenPLC Editor and run it on the OpenPLC Runtime, on your own machine or on an external one, with Linux, Windows or Docker, from a Raspberry Pi to a cloud server.
Autonomy Node
The embedded execution engine. A lightweight, containerized runtime that turns standard industrial hardware into a control node, with a zero-install web IDE served by the device itself.
Autonomy Edge
The cloud platform to deploy, monitor and manage fleets of virtual PLCs from your browser, or self-hosted with Edge on-prem.
Why teams move to virtual PLCs
Hardware independence
Your logic runs on any machine that runs the runtime, so a hardware shortage or a discontinued model stops being an emergency.
Version control
Projects live in Git with branches, commits and diffs, so every change to the logic has an author, a date and a way back.
Remote deployment
Push a new program to one controller or to the whole fleet from the browser, without opening a panel.
Fleet scale
Spin up as many virtual PLCs as the machine has resources for, and manage all of them from one place.
Reproducible labs
Training, CI and security labs can recreate the exact same control environment on demand, then throw it away.
Portability
Move a project from a development laptop to an industrial PC to a cloud instance without rewriting a line.
Where virtual PLCs show up
Machine modernization
Builders ship new machines with software-defined control while keeping the sensors and actuators already in the field.
Fleet management
Integrators and plants deploy, monitor and update dozens of controllers as one fleet instead of one panel at a time.
Cybersecurity labs
Every virtual PLC is a real network device, so teams build OT labs they are allowed to break and honeypots that look like a plant.
Software-defined automation
Control becomes infrastructure as code: versioned, reviewed, tested and deployed like the rest of the stack.
Development and training
Engineers write and test logic long before the machine exists, and students learn on the same toolchain used in production.
Frequently asked questions
Quick answers about virtual PLCs and where OpenPLC fits.
Run your first virtual PLC today
Start with the free OpenPLC Editor, or deploy and manage virtual PLCs from your browser with Autonomy Edge.