dl-breadcrumbs__homedl-breadcrumb-item__separatorGetting started with example projectsdl-breadcrumb-item__separator...dl-breadcrumb-item__separatorExample project for central I/O expansiondl-breadcrumb-item__separatorProgramming and compilationdl-breadcrumb-item__separatorMain program PLC_PRG
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Main program PLC_PRG

In the default task configuration, there is one call of a POU (program organization unit) i.e. "PLC_PRG"⮫  (shown here).

In your project the "PLC_PRG" will become a main program containing calls to other programs (POUs) which you will create one by one.

Main_program_PLC

The PLC_PRG POU has been defined by default in ST (Structured Text) editor. Keep this setting because of good visibility of the instructions at a glance and good handling for troubleshooting.

To optimize the project readability, you will work with the previously created folder "10 POUs" and add the created subroutines (POUs) to this folder. The subroutines will be created in FBD (Function Block Diagram) editor.