TIA Portal (Totally Integrated Automation Portal) V15.1 became the "Goldilocks" version: not too old (like V13), not too new (buggy early releases of V16). In 2021, global supply chains were chaotic due to semiconductor shortages. Many factories relied on legacy controllers that required V15.1. This article explains why V15.1 dominated 2021 and how to approach its download and installation correctly.
Do not download the entire 20GB suite. You likely need: best 2021 download siemens tia portal v151
: Deep integration with Simulink , allowing users to execute Model-Based Design directly on the PLC. Minimum System Requirements TIA Portal (Totally Integrated Automation Portal) V15
