Magnet Power Supply Controls of the SPring-8 Storage Ring

SPring-8 Storage Ring (SR) magnet power supplies (PS) were installed in the PS-rooms in March and October of 1995. High output current cables for the large DC PSs were put on the trays above the machine tunnel. A large number of small size power supplies are now under construction. A fiber distributed remote I/O (RIO) slave card was installed into the PS unit and connected to the RIO master card in VME. A test program for the power supply system using an RIO device-driver was developed on an HP-RT workstation [1]. Magnet PS control programs are now in being written.