Interlock and control for the RF system of the ANKA storage ring

The RF system for the ANKA storage ring has two plants, each plant consists of one 250 kW transmitter at 500 MHz feeding two cavities, with all the peripherals. It has three levels of control: the machine control, the transmitter control and interlock, and the fast interlock. Each one with different response times: 1 sec, 20 msec and 10 /spl mu/sec, respectively. The first is based on Java language for NT-Windows and LonWorks, the second on an industrial PLC system and the third is hardware electronic. The machine control, controls the whole RF system, but any instruction referred to the transmitter is filtered by the PLC system that executes the action, or not, depending on the status of the interlocks. The fast interlock is running in parallel and shut down the system when a major fault occurs, independent of the others. In this paper we will present the two interlock systems, the general control system of ANKA has already been widely presented elsewhere.