Eclipse 4diac
Eclipse 4diac: A focused IEC 61499 environment for modeling, deploying, monitoring, and debugging automation. Ranked #12 of 16 in IoT Development Tools by our editors (7.9/10); pricing: Free plan; best for IEC 61499 industrial automation projects.
At a glance
- Editor score7.9 / 10
- PricingFree plan
- Best forIEC 61499 industrial automation projects
- Free planYes
- Paid fromFree
- Facts checked25 Sep 2026
Where it wins
- Models function-block networks and configures automation hardware.
- Maps logic to device resources for selective application deployment.
- Supports monitoring and debugging, including breakpoints and step-through.
Where it doesn't
- Focused on IEC 61499 industrial automation rather than general IoT firmware.
- Deployment uses the companion 4diac FORTE runtime on supported targets.
- Community and documentation are the listed support channels.
Our verdict on Eclipse 4diac
Eclipse 4diac is an open-source environment for designing and running distributed industrial automation and control systems based on IEC 61499. It is aimed at engineers working with function-block applications across PLCs and embedded devices, rather than teams looking for a general-purpose IoT firmware toolkit. The 4diac IDE covers project modeling and hardware configuration, while its companion 4diac FORTE runtime executes IEC 61499 function-block networks on supported targets.
The workflow spans modeling, mapping, deployment, and runtime inspection. Engineers can create basic, composite, and service-interface function blocks and adapters, specify hardware, then map networks or individual blocks to device resources. Selective deployment sends applications to corresponding resources. Monitoring and debugging include interface values and trigger events, and individual function blocks can be tested with breakpoints and step-through debugging. The project lists integrations and protocols such as MQTT, OPC UA, and Modbus, alongside support for platforms including Raspberry Pi, BeagleBone Black, and several PLCs. IDE downloads are available for Windows, macOS, and Linux; runtime target support varies by component and platform.
The project is free and open source, and its components use the Eclipse Public License 2.0. That makes it a fit for teams comfortable assembling an IDE-and-runtime workflow around IEC 61499, with community support and documentation. Its specialization is also the main boundary: projects centered on broad IoT firmware development rather than distributed industrial control may be better served by a more general tool. Choose Eclipse 4diac when function-block modeling, resource mapping, and debugging across supported automation hardware are central requirements; look elsewhere if IEC 61499 is not part of the intended workflow.
Your product? Our editors can test Eclipse 4diac in depth and publish a review, labelled as paid · from $149/mo →
Eclipse 4diac pricing
Eclipse 4diac fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Supported languages | C++; IEC 61499 function blocks |
| Device simulator | Not verified |
| Firmware debugging | Yes |
| Supported protocols | OPC UA, OPC DA, HTTP, MQTT, serial (RS232), FMI, TSN, FBDK/IP, Modbus, openPOWERLINK, Arrowhead |
| Supported boards | Raspberry Pi, BeagleBone Black, PLC01A1, Revolution Pi, Wago PFC200, PiFace Digital 2, µMIC.200, Bosch Rexroth PLC, Lego Mindstorms EV3 |
| Deployment targets | Windows, Linux (including ARM), NetOS, eCos, rcX, vxWorks, freeRTOS; PLCs and embedded devices |
| Deployment | Desktop, Self-hosted |
| Platforms | Windows, macOS, Linux |
| Support | Community, Docs |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 4 integrations: 4diac FORTE, MQTT, OPC UA, Modbus |
| Pricing | Free plan |
| Website | eclipse.dev |
| Facts checked | 25 Sep 2026 |
Eclipse 4diac integrations
Eclipse 4diac lists 4 integrations on its own site.
- 4diac FORTE
- MQTT
- OPC UA
- Modbus
Alternatives to Eclipse 4diac
- PlatformIO IDEA broad, free build and debugging environment for embedded projects across many architectures.9.4
- Arm Keil MDKA broad Arm MCU toolchain combining IDEs, compilers, debugging, simulation, and middleware.9.2
- Code Composer StudioA capable free IDE for TI development, with target support focused on TI hardware.9.1
See all Eclipse 4diac alternatives →
Used Eclipse 4diac? Be the first to review it
The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used Eclipse 4diac for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.
Write a reviewTwo minutes · verified accounts only · read by an editor before it appears
Featured on iTechGuides
Eclipse 4diac is listed in our IoT Development Tools directory. Add the badge to your site — it links back to this page.
<a href="https://www.itechguides.com/products/eclipse-4diac/"><img src="https://www.itechguides.com/best/badge/eclipse-4diac.svg" alt="Featured on iTechGuides" width="230" height="46"></a>
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
Last updated · How we research and update