AH500 Programming Manual The introduction of the POU (Program Organization Unit) framework not only divides the main program into several program units, but also replaces the traditional subroutines with functions and function blocks. The framework of the program becomes more modular, and is easier to be managed. The concept of tasks which is used to manage the execution order of the programs advances the program development to the level of project management. The large-scale program development becomes easier to be managed. 1.2.2 Program Organization Units and Tasks The POUs (Program Organization Units) are the basic elements which constitute the PLC program.
Differing from the traditional PLC program, the character of the program framework introduced by 1-10