“…The DEC-VAX (VMS) [10] and CAMAC-based machine control system of TEXTOR was designed 25 years ago [1] [2]. It was twice adapted to the technical requirements of TEXTOR in 1985 [3] [4] and 1990 [5] [6] when the Simatic S5/S7 programable logical controller (PLC) was added. Meanwhile the system has reached its technical limits.…”