Siemens vs. Mitsubishi: Which PLC Platform is Better for Learning Automation?

The Great Debate: Siemens or Mitsubishi?

In the world of industrial automation, two names stand above the rest in terms of global reach: Siemens and Mitsubishi Electric. For students and training centers, the question isn’t which is “better”—both are world-class—but rather, which is better for learning?

This article compares the Siemens S7-1200 and the Mitsubishi FX5U, the two most popular platforms for modern automation education.

1. Software Ecosystem: TIA Portal vs. GX Works 3

The “experience” of a PLC is largely the experience of its software.

Siemens TIA Portal

• The Good: It is a “Totally Integrated Automation” portal. PLC, HMI, and Drive parameters are all in one project. The drag-and-drop functionality for hardware configuration is best-in-class.
• The Challenge: It is a massive software package. You need a powerful PC (i7, 16GB RAM minimum) to run it smoothly. The licensing can also be expensive for small private labs.

Mitsubishi GX Works 3

• The Good: Very stable and “lightweight” compared to Siemens. It follows a very logical, structured approach that engineers have loved for decades. It is excellent for high-speed pulse control and motion tasks.
• The Challenge: The integration between PLC and HMI (GT Works) is not as “seamless” as Siemens. You often feel like you are working in separate tools that talk to each other.

2. Hardware Architecture and I/O

Siemens S7-1200

Siemens uses a modular-but-compact design. The Signal Boards (which plug into the front of the CPU) are a genius way to add a few I/O points without increasing the footprint. Siemens is also the king of PROFINET, making networking and remote I/O very intuitive to teach.

Mitsubishi FX5U

The FX5U is part of the “iQ-F” series. It is incredibly fast. If you are teaching high-speed counting or simple motion (stepper/servo control), the FX5U often offers more “built-in” capability for the price. It uses CC-Link IE Field Basic for networking, which is very popular in Asian manufacturing hubs.

3. Global Job Market Demand

Where do your students want to work?

• Siemens: Dominates Europe, Africa, and large parts of the Middle East and South America. If they are going into the automotive (German brands), pharmaceutical, or large-scale process industries, Siemens is the gold standard.
• Mitsubishi: Dominates the electronics manufacturing, semiconductor, and packaging industries in Asia (China, Japan, SE Asia). It is the preferred choice for many machine builders (OEMs) due to its reliability and cost-performance ratio.

4. Learning Curve for Students

Why Siemens is good for beginners:

The visual nature of TIA Portal helps students “see” the system. The way it handles Data Blocks (DBs) and Tags is much closer to modern computer programming (like C++ or Python), which younger students often find more intuitive.

Why Mitsubishi is good for beginners:

Mitsubishi forces you to understand Memory Mapping (X, Y, M, D registers) more directly. While this feels more “old school,” it gives students a deeper understanding of how a PLC actually works under the hood. Once you master Mitsubishi’s memory handling, you can learn almost any other PLC brand easily.

Summary Comparison Table

Conclusion: Which should you choose?

If your budget allows and your local industry is Siemens-heavy, start with an S7-1200 kit. The modern interface prepares students for the future of “Industry 4.0.”

However, if you want to teach precision machine control and want a software that runs on every laptop in the lab, a Mitsubishi FX5U kit is an unbeatable workhorse.

Can’t decide? We offer “Dual-Brand” lab packages. Contact Peggy to discuss how to give your students the best of both worlds.