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OpenPLC Runtime

  • Software
  • Robot arms and industry
  • Framework

A headless industrial PLC runtime that executes IEC 61131-3 programs on standard computing hardware, controlled by the OpenPLC Editor v4 via a REST API.

Made by Autonomy Logic, United States (checked on github.com/Autonomy-Logic (opens in a new tab)).

Source on GitHub: github.com/Autonomy-Logic/openplc-runtime (opens in a new tab). Facts read at commit 8d69d93 (opens in a new tab).

Licenses

Code
MIT (opens in a new tab)

Read by Robotheca from LICENSE (opens in a new tab) (MIT) at commit 8d69d93 (opens in a new tab), on 16 Oct 2026.

Commercial use
Yes

What it does

  • Runs programs written in Ladder Logic, Structured Text, Function Block Diagram and other IEC 61131-3 languages created in OpenPLC Editor v4.
  • Exposes an HTTPS REST API on port 8443 for uploading programs, monitoring compilation and starting or stopping execution.
  • Compiles uploaded programs on the device into shared libraries and loads them dynamically.
  • Executes the PLC core with real-time SCHED_FIFO priority for deterministic scan cycles.
  • Provides a WebSocket debug interface for real-time variable inspection and forcing.
  • Supports hardware I/O through a plugin system, with Python and C/C++ plugins.

Written by Robotheca from the project's README (opens in a new tab) at commit 8d69d93.

Getting started

Difficulty
Intermediate
Hardware it needs, as the project states it
Runs on any Linux-capable device across x86_64, ARM64 and ARM32 architectures. Minimum: 1 GHz single-core CPU, 512 MB RAM, 500 MB free disk. Recommended: 2 GHz dual-core CPU, 1 GB RAM, 1 GB free disk. Root privileges are required for real-time scheduling and port binding.

Maintenance

Status
Active: a commit in the last 90 days
Newest commit
14 Oct 2026 on main
Latest release
v4.3.1 (14 Oct 2026)

Checked on GitHub on 16 Oct 2026.

Links

Robots on Robotheca that use it

No robot on Robotheca is linked to it yet. Links come from a robot's robot.yaml, from its dependency files read as text, or from Robotheca's editors.

Robotheca lists software as a reference: nothing is hosted or run here, and every fact links to where it was read.