I try to work on a test PLC whenever possible unfortunately I didn’t have a PLC available when I started testing this project. I’ve recently changed laptops and currently don’t have Unity Pro installed, but I think the simulator does give you an output on the PID if it is setup correctly. I’m sure someone on here can correct me if I’m wrong. I realise that you can never simulate a PID fully or even test it with a PLC when not on site (too many physical variables), but why should a simulator not handle PID’s they are only complex calculations? Anyway good comments and definitely one to be added to my favorites.