Programming s7 300 siemens

[Gerami 1]

Hi, i can not understand plc program that marked in following image. Anyone can help whats this part of program do?

[dekor 12]

It is a network where different components of one equipment are declared available ( installed).

Using the results from this network, the program will access functions related to installed components and will not access functions related to not installed components.

It seems to be explanation in project also.

Language is German.

[Gerami 1]

Thanks dekor