ISPSoft User Manual 5.2.2 POUs in ISPSoft All POUs created by users are listed in the program management area. The POUs of the program type and the POUs of the function block type are managed separately. Besides, the programming language in which a POU is written determines the icon representing the POU, and the information about the POU is put at the end of the POU name. After a POU in the project management area is double-clicked, a POU editing window will appear. The POU editing window is composed of two parts. A table of local symbols is at the upper part of the window, and the body of a program is at the lower part of the window.
Besides, the editing environment at the lower part of the window varies with the programming language used. Please refer to the following sections for more information about symbol tables and program editing. 5-4