【摘要】 在这一系列讲座中,将陆续介绍一种工业控制领域有革命性意义的新兴技术-现场总线技术的概况以及几种流行的现场总线 FF、 Profibus、 LonWorks、 CAN、 HART等,使读者对现场总线技术有一个比较全面的了解.本讲主要介绍由于采用了双向、串行、数字化通信后,可满足自动控制系统实时、可靠通信要求的通信模型,这是现场总线系统不同于传统控制系统的一个特点,比较了几种典型的现场总线,简要介绍了 LonWorks和 HART总线,并对现场总线的标准化和发展趋势进行了探讨.更多还原

【Abstract】 This is the first of the fieldbus serial lectures. In these serial lectures, a new kind of technology-fieldbus which may cause a revolution in industrial control field, and several prevalent fieldbuses such as FF, PROFIBUS, LonWorks, CAN, HART as well, will be introduced in succession,and give a overall presentation of the fieldbus technology to readers. In this paper, not only the typic characteristics of the fielbus different from traditional automatic control systems due to the all digital, two-way, serial communication ways are provided, but the communication models that can perfectly meet the time-critic, reliable needs of automatic control are described. In addition to comparing several fashionable fieldbuses and briefly introducing to LonWorks and HART, we make a further discussion about the standardization and developing trend of the fieldbus.更多还原