摘要
为了在具备全数字现场总线优点的同时兼容目前广泛使用的模拟仪表设备,本设计采用在传输线上既传输模拟信号又传输数字信号的HART协议通信方式,设计了由NEC78F0503单片机为控制器、A5191HART芯片为调制解调器的协议转换器,实现了PC机对模拟现场设备的实时控制。
In order to have the advantages of all - digital field bus at the same time compatible with the current widespread use of the analog HART , the design uses a transmission line in both analog signal transmission and digital signal transmission of the protocol, designed for single -chip controller by NEC78F0503 , A5191 HART modem chips for the conversion of the agreement, the realization of the PC machine simulation of real - time control of on - site equipment.
出处
《微计算机应用》
2009年第2期64-67,共4页
Microcomputer Applications
基金
福建省科技厅项目-基于嵌入式的网络便携式终端的研究(2007F5039)
