Hello,
My name is Pedro, i am from Spain, and actually I live here too, but time difference does not matter for me. I finished in 2016 my bachelor in electronic and automatic engineering, and i currently am studying predoctoral course in industrial electricity.
On the other hand I also work as electric engineer in a company from spain, doing exactly electrical and pneumatic schematics of different automatic systems.
For you project you must check first of all what kind of signal you scale emites, maybe you have configured the input of the PLC as a logic input when your scale generates an analog signal.
Please lets talk more about what your project is.
Best regards