S7-GRAPH is a language that follows the IEC 61131-3 standard for PLC programming. It uses graphical symbols to represent states, transitions, and actions of a control system.

2 Data structures in PLC programming Data structures are ways of organizing and storing data in a program, such as arrays, lists, stacks, queues, trees, graphs, and hash tables.

Recently I became interested in PLC programming. I'm not planning on working in this field on building a career, just want to play with a bit. I've some background in software development and ...