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Supervisory control system for superconducting magnet power supplies in JT-60SA is designed and developed. This system is in charge of many kinds of control; discharge sequence control, real-time magnet current control, data acquisition, machine protection and human safety. In the design, communication interface has to be optimized according to all requirements. The most important feature is real-time control with 4 kHz which is required for equilibrium control of plasma. In order to satisfy this requirement, reflective memory (RFM) network is applied for high speed data sharing with multiple controllers. This paper describes the architecture of the control system and the operation of the power supply system under the supervision.

In order to satisfy the Requirement of the Fast Control Cycle and Fast Communication between controllers for the Hot Strip Mill, we accept the Fiber-Optic Reflective Memory Net to connect all the controllers in one Area to compose the “Area Controller Group” structure in the Basic Automation Level. The MASIC-2000 D had been used in Lai-Wu and Cheng-De Hot Strip Mill, it will be used in the 1700mm Hot Strip Mill of An-Shan Iron & Steel Corp.

The Reflective Memory System (RMS) represents a modular busbased architecture that belongs to the class of distributed shared memory (DSM) systems with a hardware-implemented mechanism for maintenance of memory consistency. The RMS is characterized with an update consistency mechanism for shared data in the 'mirrored' memory regions. The goal of the research presented here was to achieve a relatively large global performance and scalability improvement, using a number of relatively small particular enhancements on independent and relatively non-correlated system components (a RISC-style methodology applied to DSM). This work analyses five proposed improvements to the existing RMS. Simulation analysis using a functional simulator based on a convenient and flexible synthetic workload model was carried out, in order to evaluate each proposed idea for a wide variety of workload parameters. Besides simulation results, each presented idea is also considered from the implementational point of view. Finally, the entire fully implemented prototype design is briefly mentioned.

Complex control system architectures are usually characterized by the heterogeneity and the distribution of their technological components. Besides, system engineers have at their disposal a number of technological alternatives to implement any of the different parts of a distributed application. For those reasons, the communication among the distributed components of a system often becomes an issue to address. In this paper we report a technique to solve this problem which is based on the use of reflective memory devices without any additional software requirement, and that can satisfy hard throughput requirements. We describe the implementation of a testbed for testing the proposed communication technique. We finally apply the results to a real-time data acquisition system characterized by a very heterogeneous architecture, whose components have been pushed to the limits of their performance and capacity.