现场总线控制系统是一种全新的分布控制系统，是以控制、计算机、数字通讯等技术为主要内容的综合技术。基金会现场总线以其技术上的优势，极有希望成为主流发展趋势。它的最大特点就是应用功能块实现全分布式控制。关键词 现场总线，功能块，调度，应用进程，虚拟现场设备Fieldbus-Control system is a kind of new Distributed-Control system, and a kindof integrated technology based on Automation-Control, Computer and DigitalCommunication. With great advantage in technology, Foundation Fieldbus technologyis coming to be the major one. And its main feature is to implement distribute controlby using function blocks.KEYWORDS Fieldbus, Function Block, Schedule, Application Process， Virtual FieldDevice