This Video Demonstates How to work with Codesys V2.3 Using Structured Text .
Watch Previous Tutorial_01: https://bit.ly/3cAFPm1
Tutorial_02: https://bit.ly/2VMXQXr
Tutorial_03.A: https://bit.ly/2x1Cuxh
to know better about Program Logic and it's Visualisation
You Can use codesys free software to Program WAGO PLC and many other.