These design-patterns come from various sources all around the internet.
I decided to study and rework / translate them into Codesys V3.
The patterns are ideally suited for selfstudy purpose.
Any new contributions are heartly welcome!
Kudo's go out to the original posters!
Allthough design patterns can ease your life significantly, the best solution is always the simplest solution.
No matter what fancy pattern you throw at it!
If you need any further reading on these topics, I suggest you visit the following page by gabr42, 'The delphi geek'.
It contains many many useful links on for OOP related topic. A SOLID (pun intended) starting point for all!