What Is Eclipse 4diac™?

Eclipse 4diac™ Provides an Open Source Infrastructure for
distributed Industrial Process Measurement and Control Systems
based on the IEC 61499 Standard.

design once use everywhere

Eclipse 4diac Virtual Community Meetings

Join us for a discussion on IEC 61499 and Eclipse 4diac. We welcome interested participants from all background, whether seasoned developer or interested newcomer. We will demonstrate new developments in Eclipse 4diac, outline our development roadmap, and provide enough room for questions and answers with the project team of Eclipse 4diac.

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Eclipse 4diac provides

IEC 61499 Engineering Tool 4diac IDE Real-time Capable IEC 61499 Execution Environment 4diac FORTE Easy to use Build Environment for 4diac FORTE 4diac FBE IEC 61499 Function Block Library 4diac LIB IEC 61499 example systems 4diac SYS

Latest News

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Eclipse 4diac Weekly #67

26 December, 2025

Update on what development happened across the Eclipse 4diac project in the week from December 19 to December 26, 2025.

This week’s changes further refine usability and robustness across Eclipse 4diac. 4diac IDE received important fixes for scaling, positioning, ST editor stability, and internationalization, while 4diac FORTE extends byte-handling capabilities and improves OPC UA internals. Documentation got a section on OPC UA deployment.

4diac IDE 3.0.1 – Maintenance Release

23 December, 2025

We are pleased to announce 4diac IDE 3.0.1, a maintenance release that improves stability, correctness, and usability across 4diac IDE.

Eclipse 4diac Weekly #66

19 December, 2025

Update on what development happened across the Eclipse 4diac project in the week from December 12 to December 19, 2025.

This week’s updates focus on strengthening robustness and consistency across the Eclipse 4diac toolchain. 4diac IDE received a broad set of fixes and refinements around type handling, refactoring, validation, and UI stability, while 4diac FORTE continues to improve code quality and OPC UA-related internals.