As a beginner facing my first PLC project with Siemens S7-1500, what's the one critical mistake everyone makes that I should avoid at all costs when setting up my first ladder logic program?

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Hey there! As someone just starting with Siemens S7-1500 and TIA Portal, I totally get where you're coming from. The one critical mistake that trips up almost every beginner is using memory tags instead of data blocks for your variables and data storage.

Coming from other PLC platforms like Rockwell, it's tempting to create memory tags (like M bits or global variables) because that's what you're used to. But in Siemens world, this is a major pitfall! Experienced programmers who switched from Rockwell to Siemens often say this was their biggest mistake.

Here's why it's so critical: Data blocks (DBs) in Siemens are much more powerful and organized. They give you structured data storage, better memory management, and make your code way more maintainable. When you use memory tags scattered everywhere, your program becomes a mess to debug and modify later.

Instead, create organized data blocks right from the start. Group related variables together, use meaningful names, and structure your data logically. This approach will save you countless hours of frustration and make your first project much more successful!

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