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阐述了开放式体系结构数控系统的特点，指出开放式数控是数控发展的必然趋势。根据数控系统对ＰＣ的利用程度，提出数控系统可分为衍生式、嵌入式和开放式三种模式的观点。以快走丝线切割机床为例，总结出开发研制开放式体系结构数控系统的原则和步骤，并阐明了开放式快走丝线切割机床数控系统的分层模型和各层的功能。
The characteristics of open architecture numerical control system are expounded. It is pointed out that open numerical control is the inevitable trend of numerical control development. According to the use of CNC system on the PC, numerical control system can be divided into derivative, embedded and open three models point of view. Taking fast cutting wire cutting machine as an example, this paper summarizes the principle and steps of developing open architecture numerical control system, and expounds the hierarchical model and the functions of each layer of CNC system of open fast cutting wire cutting machine.