part of the whole project. The communication was implemented using Factory Link, a well-known SCADA program by US-Data. A factory link application is running on the same OS/2 PC together with the fuzzy logic controller. The fuzzy logic controller reads data out of the Factory Link Real Time DataBase and it also writes data back into it. Another Factory Link task is communicating with the DCS through the Eckhardt DCS bus. This way an image of the process measurements is created in the Factory Link RTDB and the fuzzy outputs are forwarded to the DCS.