Control System of Cryogenic and Superconductive Devices at BEPCⅡ

The control structure of EPICS and PLC is used in the cryogenic and superconductive control system of Beijing Electron Positron Collider (BEPCⅡ), which solves the problem that a pure PLC control system does not allow the user to modify the industrial flow on-line. It is convenient to modify control flow and improve control logic on-line according to users’ requirement in the EPICS-PLC system. The system architecture, functionality, interlock and flow control are described.