Windows2000下基于RS-485工业数据采集网络的设计与实现

The Design and Realization of Industry Data Acquisition Network in Windows2000 Base on RS-485

本文介绍了 Windows2 0 0 0下基于串行通信接口标准 RS- 485工业数据采集网络的设计与实现。通过RS- 485将一台 P 工业控制计算机和 2 15台以单片机 2 0 5 1为核心的数据采集仪组成星型和总线混合网络。采用主-从轮询通信协议 ,利用 Windows2 0 0 0多线程技术实现了上位机与多下位机的在线实时通信。本网络结构简单 ,编程方便 。

The design and realization of industry data acquisition network in Windows2000 Base on serial communication interface standard RS-485 is introduced. Through RS-485 a PⅢ industry control computer links 215 data acquisition equipment which has a 2051 single chip computer form bus topology mixed star topology network. Communication protocol is host computer and subordinate computer poll. Using thread technology of Windows 2000 host computer realizes real online communication with subordinate computer. The structure of this network is simply, programming is very easy, it is a useful method of data communication.