Morning,
I would like to know if there is anykind of test/measure that I could do to Profibus cable to check that it is OK.
I remember some expert testing with a multimeter the wires, I think they were testing the voltaje but Im not sure... 
Maybe they were testing not continuity between wires only.... but I think they were testing some voltage between wires, could it be?

Thank you! :)

Hi alvconsan!

I'm not sure how they will check it, but here is a link to some measures to consider. I hope it helps.