Chapter 5 POU and Task 5.3.3 Executing the POUs Assigned to a Task More one POU can be assigned to the same task, and the order in which the POUs listed in a task section in the project management area are arranged is the order in which the POUs are executed. Please refer to the following example. There are four POUs in the project. These POUs are described below. 5-13 POU name Description Prog0 When M0 is ON, the value in D0 is 0. Prog1 When M0 is ON, the value in D0 is 1. Prog2 When M0 is ON, the value in D0 is 2. OUTPUT When M0 is ON, the value in Y0 is the value in D0.