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介绍了在现场检测仪表中应用与现行４～２０ｍＡ模拟信号兼容的数字通信ＨＡＲＴ协议的研制工作。应用ＨＡＲＴ协议能使仪表既保留传统两线制传输的优点，并且还可实现多主通信、多点控制，易于对远距离现场仪表进行组态控制。
This paper introduces the development of digital communication HART protocol which is compatible with the current 4 ~ 20mA analog signal in field instrumentation. The application of HART protocol can make the instrument not only retain the advantages of the traditional two-wire transmission, but also realize multi-master communication and multi-point control, and it is easy to control the configuration of the remote field instrument.