Structured Text in OpenPLC
Introduction Structured Text Project Examples Two-Button Latching Circuit One-Button Latching Circuit with Emergency Stop Playing with Timers Steady(ish) State (e.g Temperature) Comments? Introduction After playing around with ladder logic (LL) in OpenPLC, I wanted to get a basic grip of structured text (ST). While LL is a visual method of programming PLCs, ST is a C-like language for programming PLCs, featuring well-know coding functions such as IF and WHILE.
Fortunately, OpenPLC also allows you to program PLCs using ST! There is one minor difference; with Ladder Logic, OpenPLC can simulate the circuit and get a pretty visualisation based on the LL design itself - see the images in my previous post. With ST, because there is no design, there is no pretty visualisation. However, the Debugger does give a timeline of the states of the various variables, and it can be used to force a value, so you can still simulate a circuit.
