the fieldbus control system ( fcs ) comes into being with the fast of auto-control, auto-detection and computer network technology . and it is the integration of the modern computer technology, the communication technology and the detection control technology, which is called the 3c ( computer communication control ) development 现场总线控制系统是在自动检测控制技术和计算机网络技术飞速发展的推动下形成的,它是现代计算机技术?通信技术和检测控制技术的集成,人们称之为3c(computercommunicationcontrol)技术。