2. The method as claimed in claim 1 , comprising: generating the code for the target project to be executed on the programmable logic controller in a corresponding high-level language; and implementing program organization unit (POU) entities contained in the code with POUs for IEC61131-3 applications; and loading the implemented POU entities contained in the code and the IEC61131-2 applications from the programming tool to the programmable logic controller.
2. The method as claimed in claim 1 , comprising: generating the code for the target project to be executed on the programmable logic controller in a corresponding high-level language; and implementing program organization unit (POU) entities contained in the code with POUs for IEC61131-3 applications; and loading the implemented POU entities contained in the code and the IEC61131-2 applications from the programming tool to the programmable logic controller. 4. The method as claimed in claim 2 , comprising: relocating the library project created in the high-level language from the runtime system of the programmable logic controller and external application program interfaces are resolved.