Start With a Guide
The articles below are published newest first. If you are looking for a subject rather than the latest post, these guides group everything by topic.
TIA Portal
How TIA Portal programs are structured, and the habits that keep them maintainable.
SIMATIC AX
Siemens' text-based, Git-friendly toolchain, explained for TIA Portal engineers.
Codesys
What a Siemens engineer notices looking at the non-Siemens PLC world.
Custom Devices
Electronics and operator interfaces built when nothing off the shelf fits.
Recent Posts
Move one Boolean pump permissive from Structured Text to SIMATIC AX XLad, keep its typed caller stable, inspect generated ST, and verify the result with S7, LLVM, and AxUnit.
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Building My Own E-Paper Macro Keypad
August 14, 2026
Why I started building a battery-powered Bluetooth macro keypad with e-paper key labels: the two things that got in my way with a wired LCD keypad, and the three design choices meant to fix them.
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Does SIMATIC AX Already Support the S7-1200 G2 CPU 1214C?
August 12, 2026
A hands-on SIMATIC AX investigation of hardware support package 4.8, catalog 2510.17, CPU 1214C discovery, unsupported package overrides, and verified hardware compilation.
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Build readable SIMATIC AX tank control logic with analog scaling, protected Manual and Automatic modes, pump priming, fault recovery, and AxUnit tests.
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SIMATIC AX Tank Demo: Building the Software Skeleton
July 21, 2026
Build a compiling SIMATIC AX software skeleton with named UDTs, mapping functions, function block instances, global data, and a clear main-program scan order.
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