Abstract
The development of a new control system is crucial for the cryogenic system because of fairly complicated cooling scheme of the Large Helical Device (LHD). It is highly reliable and flexible to handle a delicate cryogenic system. The control system is based on open system and consists of work stations, VME (Versa Module Europe) controllers, Local Area Networks (LAN), and operating graphic consoles. The control system is composed as a duplex system which significantly improves the reliable operation with fault diagnoses of each component. The fault diagnoses of the VME controllers are now limited to the CPU and communication boards. However it may be extended to every board including analogue input or output boards and digital input or output boards. Based on above cryogenic control system, the overall operating scenario of the cryogenic control system; such as, a cool-down, a steady-state operation, a warm-up, a power failure and a coil quench, are being considered to develop a fully automatic control program for the LHD cryogenic system.
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Schedule a callMore From: Proceedings of the Sixteenth International Cryogenic Engineering Conference/International Cryogenic Materials Conference
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