Programming Languages Used in PLCs - JSS3 Basic technology Lesson Note

PLCs primarily use ladder logic as their main programming language. Ladder logic resembles electrical relay logic diagrams, making it intuitive for engineers and technicians familiar with electrical circuits. It uses graphical representation with rungs and logic symbols to create control algorithms. Additionally, PLCs support other programming languages such as function block diagrams (FBD) and structured text (ST). FBDs simplify complex control tasks by breaking down logic into interconnected function blocks, while ST provides a text-based programming approach similar to high-level programming languages, offering flexibility for more intricate control algorithms.