At the moment, there is a need for the implementation of fuzzy logic (fuzzy controller) for S7-300, writing specifically for cfc, stl, lad - does not really matter, you can even use a package Siemens fuzzycontrol ++. The essence of the project is to create a fuzzy controller under STEP7, object of regulation in Matlab / simulink.
The problem itself is to write fuzzy controller using Step7.
Need help in the implementation, of course, for a fee, for your time.

Best wishes.