基于OPC XML-DA技术及.NET平台的远程数据访问系统的设计与实现

Design and Realization of Remote Data Access System Based on OPC XML-DA Technology and.NET Platform

简要介绍了.NET平台的主要组成部分Windows.NET、Visual Studio.NET和.NET Framework,概述了OPC XML-DA规范的主要内容,设计了远程数据访问系统的整体框架。详细的阐述了数据访问中间件的具体框架设计、数据访问模块的编写及XML WebService服务模块的开发,并采用C#.NET开发了OPC XML-DA客户端。最后,进行了系统整体实验测试,利用西门子WinCC TAG Simulator的数据源,WinCC OPC服务器获取相应数据,通过OPC XML-DA客户端跨Internet访问中间件服务器进而访问OPC COM服务器,实现了远程访问WinCC OPC服务器。

.NET platform of the main parts of Windows . NET, Visual Studio. NET and . NET framework were introduced briefly, main contents of the OPC XML-DA specification was outlined, whole framework of the remote data access system was designed. Design of specific framework about the data access middleware, and the process of pro- gramming data access module and the development the XML WebServiee module were described in detail. It developed OPC XML-DA client using C#. NET. Using Siemens WinCC TAG Simulator to generate data,and using Siemens WinCC OPC server to acquire data. Making use of OPC XML-DA client to access OPC COM server by accessing middleware server crossing internet and data have been accessed successfully from the WinCC OPC server.