A simple, convenient control system has been developed for a 150 MeV proton FFAG accelerator complex at Research Reactor Institute, Kyoto University (KURRI). This control system is based on conventional PCs and programmable logic controllers (PLC) and these are connected over TCP/IP network. Each PLC is responsible for autonomous control of connected devices such as motors or power supplies, and also responsible for maintaining a parameter database periodically read/written by remote PCs over TCP/IP network. Man-machine interfaces (MMI) and integrated sequences are developed using Lab-View on these PCs. This control system has been successfully served for the actual operation of this FFAG complex, including the radiation protection control. Further developments in DAQ or interfaces are on the way.
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