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Best Practices

3 articles

Multi-Instance vs Single-Instance Function Blocks in TIA Portal

December 5, 2025 — Learn why multi-instance function blocks in TIA Portal are better than single-instance for reusable, library-ready PLC code.

Why You Should Avoid Using Merkers (M Bits) in Modern TIA Portal Programs

November 24, 2025 — M bits cause hidden bugs, kill reusability, and make maintenance painful. Here is why DB tags, UDTs, and FBs are the better choice.

Understanding the InOut Interface Pattern in TIA Portal

October 3, 2025 — How to use InOut interfaces with UDTs to create a clean, scalable data architecture for your TIA Portal PLC programs.