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 #87

22 May, 2026

Update on what development happened across the Eclipse 4diac project in the week from May 15 to May 22, 2026.

The latest updates for 4diac IDE introduce enhanced validation rules, FB color, and a prototype AsciiDoc editor for Type Documentation. Meanwhile, 4diac FORTE runtime expands compliance with additional LTIME timers, general-purpose data latching, and a decoupled system testing executable to ensure ecosystem stability.

OpenFB 1.1.0 Released

18 May, 2026

Introducing OpenFB - a Python-powered IEC 61499 Runtime for 4diac IDE.

Eclipse 4diac Weekly #86

15 May, 2026

Update on what development happened across the Eclipse 4diac project in the week from May 08 to May 15, 2026.

This week introduces new edge-detection and generic flip-flop function blocks, modernizes timer FB implementations, and improves type cleanup, export handling, and editor behavior in 4diac IDE, while 4diac FORTE gains corresponding runtime support and connection handling fixes alongside ongoing code quality refinements.