PLC programming using TwinCAT 3 - Function blocks & interfaces (Part 6b/18) 

In this part we will continue our journey of the object oriented features of IEC 61131-3 and look into something called interfaces. Interfaces provide a layer of abstraction so that you can write code that is ignorant of unnecessary details. Interfaces aid you in designing more modular and robust software. With interfaces it’s possible to decouple direct dependencies between objects in your software.
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Intro 0:00
Interfaces 0:58
Why interfaces? 6:24
Example program 10:17
Dependency injection 18:49
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