So I am new to PLC programming and I come from a traditional Object Oriented programming background. I am used to programming languages having guides/references on how to use the languages but I cannot find any readily available online.
I want to use methods to program this PLC in Structured Text, but I do not know how to. Is there any way I can write a method in ST?
With the release of the 3rd Edition of the IEC61131-3 by PLCopen there are object oriented extensions included.
These extensions are already available on many PLC platforms.
Structured Text is just a part of the IEC 61131-3 languages. And indeed I recommend it as the first choice if you come from another C-like language (with or without OOP). You can use it very well with OOP.
Main feature of the OOP extension :
A FunctionBlock is like a class and can extend (derive from) another FunctionBlock and implement multiple Interfaces and it can have Methods and Properties (get/set) that can all be defined via Interfaces
Don't code your Structured Text programs using traditional procedural programming techniques, if you don't want!
