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随着数字检测装置的不断增加，现场总线及其标准将逐步取代原来的通讯结构及4～20mADC模拟信号传递．是现场总线对传统的控制系统及结构带来革命，对其发展过程、现状及前景作一介绍.
With the increasing number of digital detection devices, field bus and its standards will gradually replace the original communication structure and 4 ~ 20mADC analog signal transmission. It is the field bus that brings revolution to the traditional control system and structure and introduces its development process, current situation and prospect.