Chapter 1 Introduction
1-11
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.
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