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As a fresh graduate entering industrial automation, how do I navigate the 'Siemens vs. Rockwell vs. Mitsubishi' holy war when choosing my first PLC platform for a career that will last decades?

NoraWard

NoraWard

2026-02-10

answer

Hey there! That's an excellent question that every new automation engineer faces. The 'holy war' between Siemens, Rockwell (Allen-Bradley), and Mitsubishi is real, but here's how to navigate it smartly:

First, consider your geographic location. Rockwell dominates North America, Siemens is strong in Europe and has global reach, while Mitsubishi is popular in Asia. If you're in the US, Rockwell experience will open more doors initially. If you're in Europe or Asia, Siemens or Mitsubishi might be better starting points.

Second, think about learning curve. Mitsubishi is often considered easiest for beginners with intuitive programming. Siemens has a steeper learning curve but offers more power and flexibility. Rockwell is somewhere in between and very popular in North America.

Here's my advice: Start with the platform most common in your region, but don't stop there. The best automation engineers are platform-agnostic. Learn the fundamentals of PLC programming first - ladder logic, function blocks, structured text. Once you understand the concepts, switching platforms becomes much easier.

For a decades-long career, focus on becoming a great automation engineer, not just a 'Siemens engineer' or 'Rockwell engineer'. The core principles transfer across platforms. Many experienced engineers work with multiple platforms throughout their careers.

Good luck with your automation journey! The fact that you're thinking strategically about this already puts you ahead of the curve.

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