Key Design of Control-Monitoring System of Steady High Magnetic Field Facility

Steady high magnetic field facility (SHMFF) is a basic tool for many scientific experiments and its control-monitoring system is the core part which supports experimental devices and subsystems for safe and reliable operation. The control-monitoring system of SHMFF with hierarchical structure is based on network-distributed measurement and control technology, including User Control System, Operator Control System, Central Database System, Operation Server, Magnet Control System, Web Service System, Timing System, etc. Reliable communication networks and communication interfaces based on the networks are designed for experimental devices and subsystems to exchange measurement and control data. S7-300/S7-400 PLC and industrial computers are used as the main controllers, and software system is designed based on WinCC with some interface and user programs written in C/C++ language. Additionally, an individual PLC system is configured for safety interlock and necessary identification is considered to experimental users in order to improve the reliability and security.