Block Comparison Issues, Why Does TIA Do This!?
If you have spent any time working in TIA Portal, you have probably run into that puzzling moment when blocks show up as different online compared to your offline project, even though a manual compare insists they are identical. It can be frustrating, especially when you are sure you changed nothing in the logic or you reverted your edits. This situation happens more often than you might think, and the explanation is rooted not in the code itself, but in how TIA Portal manages and tracks changes behind the scenes.
In this article, we walk through why these mismatches happen, what checksums really represent, why object by object compares tell a different story, and how to correctly verify whether your PLC and project are truly in sync.
🎥 Watch the full episode below, or become a Do & Grow member to access the extended breakdown on advanced checksum behaviour, compare workflows across large projects, and best practices for maintaining project to PLC consistency.
