The new vacuum control system of the CERN PS complex

The initial goal was, on one hand, to rejuvenate old equipment whose technology was very difficult to adapt to the new control methods, and on the other hand, for obvious compatibility and maintenance reasons, to standardise the hardware and software of these different systems. The hardware's two level architecture fits in very well with our needs of distributed control. Standardised and industrial equipment (VME and G64 boards and chassis, RS232 and X25 field buses, etc.) has been used where ever possible. The software is structured in two layers to obtain a standard interface to all the vacuum equipment for each of the different accelerators. This presentation describes the hardware and software architecture of this project as well as the different equipment used.