摘要
Ｈ Ａ Ｒ Ｔ通讯协议在４ ～２０ｍ Ａ 模拟信号上增强了双向数字通讯，并被广泛采用为现场仪表数字通讯标准。本文介绍了 Ｈ Ａ Ｒ Ｔ 协议物理层、数据链路层、应用层及设备描述原理，开发了 Ｈ Ａ Ｒ Ｔ 圆卡，并通过 Ｈ Ａ Ｒ Ｔ 基金会一致性测试。
HART protocol enhances the two-way digital communication in 4～20mA analog signal and has been widely applied as the standard for digital communication.This paper introduces the physical layer,data link layer,application layer and DD of HART protocol.The HART round card has been developed and passed the conformance test.
出处
《自动化与仪器仪表》
1999年第5期3-5,10,共4页
Automation & Instrumentation
