Projects
Development decisions, tests, and lessons from the Senbrix Devlog project.
7posts
ProjectsSenbrix DevlogGetting PLC data up to a server always meant standing up one more PC beside it. That grind, plus how easy AI has made coding, is why I decided to build a PLC that runs on a Raspberry Pi.
ProjectsSenbrix DevlogA ladder comes down to one question: does power get from the left rail to the output on the right? From pulling every path and ANDing then ORing them, to the two separate loops and the editor, AI, and runtime layout, this is the design.
ProjectsSenbrix DevlogThe ladder counts, and calls a C# function only when it is time to report to the server. One rule ties ladder and code into a single program: a known name in the function cell is a ladder instruction, an unknown one is the C# I wrote.
ProjectsSenbrix DevlogA fixed period, download without powering off, values that survive a blackout, auto start, and not dying from one bug. I ran a sample app to see how a .NET runtime on a Raspberry Pi covers all five.
ProjectsSenbrix DevlogI typed four lines and got an 85-rung traffic signal controller. A language that writes ladder as text, a rule to use only what the docs confirm, and a human sign-off at every stage. That is the whole reason it works.
ProjectsSenbrix DevlogThe human part was one line of symptoms, one arming, one line saying go ahead, and one line saying log it. Fifteen minutes later I had the root cause, a fixed ladder and a verification table, and writes only ever opened inside the range a human had allowed.
ProjectsSenbrix DevlogIt started with the extra PC you always had to stand next to the PLC. It ends with an AI writing ladder and fixing a fault on a running controller. All six Senbrix devlog posts on one page.
