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首先叙述HART通信协议的发展和协议的层次结构,针对某现场仪表的HART协议远程通信模块的设计与实现的要求,完成了基于HART调制解调器A5191HRT和电流环数模转换器AD421的HART协议通信模块的软硬件设计。
First of all, the development of HART communication protocol and the hierarchy of protocols are described. The HART protocol communication module based on HART modem A5191HRT and current loop digital-to-analog converter AD421 is completed for the design and implementation of a HART protocol remote communication module of a field instrument Hardware and software design.