Opening Program code in the Project pane, will display your program in basic code. The code is entered as soon as you download your program to the PLC or upload a program from the PLC.
Please use the program code for modifications only if no source program is available, since the program is displayed on the screen in basic instruction set (IL), but NOT in Control FPWIN Pro7 IL, LD or FBD. The entire documentation of the program (e.g. variable names) is lost during the upload.
If you are familiar with the basic instruction set, you can modify an uploaded program. Naturally smaller programs can be comprehended more easily than complex programs. We recommend to backup your program prior to modification with .
The modified program has to be checked, compiled and downloaded to the PLC with .