Control System of the SPring- 8 Storage Ring

R. Tanaka, S. Fujiwara, T. Fukui, T. Masuda,
A. Taketani, A. Yamashita, T. Wada and W. Xu

SPring- 8, Kamigori, Japan



The SPring- 8 storage ring is under construction and will be in comissioning in February 1997. The control system of the storage ring is designed adopting the distributed computing environment by using widely scattered VMEbus hardware system along on the storage ring of circumference about 1500m. The VME system is controlled by high performance CPU boards connected to the optical fiber FDDI backbone network via FDDI- Ethernet switchers. The remote I/O system (RIO), interconnected by optical fiber cables, is used as the field bus. The upper- level operator console system consists of UNIX workstations to realize human- oriented operation interfaced by a Graphical User Interface (GUI). The event- driven software scheme is based on the client/ server model, which provides good real- time performance with the HP- RT operating system which originated with LynxOS. The remote procedure call(RPC) is used as the communication method between machine application clients over the network. The status and the control system of a storage ring are presented.