CLASS vs FUNCTION_BLOCK in SIMATIC AX — Explained for TIA Portal Engineers
April 8, 2026 — A deep dive into the two main building blocks of SIMATIC AX — FUNCTION_BLOCK and CLASS. What each one supports, when to use which, and how they fit together in real projects. Written for TIA Portal engineers who already know function blocks.
How to Write Unit Tests in SIMATIC AX — A Step-by-Step Guide for TIA Portal Engineers
March 27, 2026 — A hands-on guide to writing unit tests in SIMATIC AX using AxUnit. Walks through the anatomy of a test file, the reset pattern, assert methods, running tests, and what to test versus what to leave for commissioning.
Unit Testing in SIMATIC AX — I Proved My PLC Code Works Without a PLC
March 25, 2026 — What unit testing is, why TIA Portal engineers should care, and how SIMATIC AX's built-in AxUnit framework lets you verify PLC code automatically — no hardware needed.
