Top Free PLC Programming Software for 2024: A Comprehensive Guide
Why Free PLC Software is a Game-Changer
The world of industrial automation relies heavily on PLCs to keep operations running smoothly. Whether it's in manufacturing, automotive, or energy sectors, PLCs form the backbone of automated processes. However, the licensing costs associated with traditional PLC programming software like Siemens' TIA Portal, Allen Bradley's Studio 5000, or Mitsubishi's GX Works can become exorbitant, especially for small to medium-sized enterprises (SMEs) or educational purposes.
Free PLC programming software breaks down this financial barrier, making it easier for startups, schools, or hobbyists to engage with industrial automation without draining their wallets.
But before jumping into the top choices, it’s essential to understand the trade-offs. Free software often comes with limitations such as:
- Limited device compatibility
- Fewer advanced features compared to their premium counterparts
- Restrictions on the number of programmable devices or project sizes
Despite these limitations, free software often provides more than enough capabilities for learning, development, and small-to-medium-scale industrial applications.
The Top Free PLC Programming Software You Should Know
1. CODESYS (Control Development System)
CODESYS is one of the most popular free PLC programming environments available, known for its flexibility and robust feature set. This IEC 61131-3 compliant software supports all the standard PLC programming languages (Ladder Logic, Structured Text, Function Block Diagram, and more), making it suitable for both professionals and beginners. Here’s why it stands out:
- Device Independence: CODESYS works with a wide range of PLC manufacturers, making it versatile across multiple hardware platforms.
- Extensive Functionality: Besides basic programming, CODESYS offers tools for simulation, debugging, and even visualization (HMI).
- Modular Architecture: It allows users to add on specific libraries and modules to extend functionality.
One of its most notable features is the support for Raspberry Pi-based PLC systems, opening doors for low-cost industrial automation solutions.
Ideal for: Automation enthusiasts, SMEs, and educational purposes.
2. Do-more Designer
Do-more Designer is the go-to free software if you're working with AutomationDirect’s Do-more PLCs. This user-friendly software makes programming easier with its straightforward interface and powerful debugging tools. Key features include:
- Graphical Interface: Highly intuitive, making it great for beginners.
- Extensive Diagnostics: Offers real-time data monitoring and diagnostics, which helps troubleshoot issues efficiently.
- Simulation Mode: Test programs before deploying them on actual hardware to prevent costly mistakes.
Ideal for: Industrial users already invested in AutomationDirect hardware, or learners looking for an easy start.
3. TIA Portal V16 (Basic Version)
Siemens’ TIA Portal is a heavyweight in the PLC software market. While the full version can be quite expensive, the Basic version is available for free and provides all the essentials for getting started with Siemens PLCs like the S7-1200 and LOGO!.
- Integration with HMI: The free version allows limited integration with Siemens HMI devices, which is a great feature if you're looking for a unified development environment.
- Standard Programming Languages: Ladder Logic, Function Block Diagram, and Structured Text are available.
- Limited Device Support: The free version supports only a handful of devices and smaller programs but is more than sufficient for learning and basic industrial projects.
Ideal for: Engineers working with Siemens hardware or those wanting to dive into the Siemens ecosystem.
4. OpenPLC
OpenPLC is a fully open-source PLC platform, making it unique on this list. It’s designed to be hardware agnostic, allowing users to work with various PLC systems and microcontrollers. Its core strength lies in its flexibility and the support from a growing community of users. Key advantages include:
- Cross-Platform: Runs on Linux, Windows, and even cloud environments.
- IEC 61131-3 Compliance: It supports all major PLC programming languages.
- Open-source Flexibility: Modify the software according to your project’s specific needs.
Despite its free nature, OpenPLC offers support for SCADA (Supervisory Control and Data Acquisition) systems and can work with platforms like Raspberry Pi, making it an incredibly versatile tool.
Ideal for: Developers, researchers, and DIY automation enthusiasts who prefer an open-source ecosystem.
5. i-Trilogi (TRiLOGI)
i-Trilogi is developed specifically for Triangle Research International's PLCs but offers a free version (TRiLOGI Educational) that is widely used in educational settings. Key features include:
- Built-in Simulator: No need for external PLC hardware to test your logic.
- Advanced PLC Functions: Despite being free, it supports advanced functions like PID control, data logging, and networking.
- Java-Based: As a Java-based tool, it runs on most operating systems and doesn't require heavy installations.
Ideal for: Educational institutions and students getting familiar with PLC systems.
Advantages and Drawbacks of Free PLC Software
Advantages
- Cost-Effective: Obviously, the biggest advantage is cost. Whether you’re a startup or in academia, having free tools significantly lowers the entry barrier.
- Learning Tool: Free software is often easier to use, especially for those new to PLC programming. They offer an accessible way to learn the basics without spending thousands on licenses.
- Community Support: Many of these tools, especially open-source ones, have strong community backing. This means there are plenty of forums, guides, and tutorials available to help troubleshoot any issues.
Drawbacks
- Limited Features: Advanced features like motion control, safety functions, or high-end communication protocols might be restricted to the paid versions.
- Device Restrictions: Many free software versions only support specific devices or smaller systems, making them less suitable for large-scale operations.
- Performance Issues: In some cases, the free versions may lack optimization, resulting in slower processing speeds or less efficient debugging capabilities.
PLC Programming Software Comparison Table
| Software | Platform | Supported PLCs | Programming Languages | Notable Features |
|---|---|---|---|---|
| CODESYS | Windows, Linux | Various (multivendor) | Ladder, FBD, ST, SFC | Modular, Raspberry Pi support |
| Do-more Designer | Windows | AutomationDirect | Ladder | Simulation, advanced diagnostics |
| TIA Portal Basic | Windows | Siemens S7-1200, LOGO | Ladder, FBD, ST | HMI integration, easy to learn |
| OpenPLC | Windows, Linux | Cross-platform | Ladder, FBD, ST, SFC | Open-source, cloud-enabled |
| i-Trilogi | Windows, Mac | TRI PLCs | Ladder | Educational use, Java-based |
Final Thoughts: Which Free PLC Software is Right for You?
There’s no one-size-fits-all answer when it comes to free PLC programming software. It all depends on your specific needs, hardware, and level of experience. Here are a few suggestions:
- For flexibility and multivendor support, go with CODESYS or OpenPLC.
- If you’re already in the Siemens ecosystem, the TIA Portal Basic version is a solid choice.
- For educational purposes, both i-Trilogi and CODESYS are ideal options due to their user-friendly interfaces and comprehensive feature sets.
The bottom line is that free PLC programming software has evolved significantly over the years. What was once thought of as “lite” or underwhelming is now a solid contender for anyone looking to get into industrial automation. You no longer have to break the bank to learn PLC programming or set up a small automation project.
2024 is the year where free software solutions have become not just viable, but essential in both learning and small-scale professional applications.
Popular Comments
No Comments Yet