【摘要】 IEC 61 4 99是即将颁布的如何使用功能块进行分布式工业过程测控系统 (IPMCS)设计的国际标准。文章描述了这一标准的历史由来、基本概念、现状及发展趋势。其中重点论述了功能块的基本类型、表达形式及其状态机器设计等相关问题 ,并给出了一个应用实例更多还原

【Abstract】 IEC 61499 is a forthcoming international standard about the application of function blocks in Distributed Industrial-Process Measurement and Control Systems. The history, basic concepts, current status and future development of the standard are described. The basic types, expressive forms and some correlative problems such as state machine design are emphatically discussed, and an application instance is given.更多还原