基于OPC技术的控制系统组态--毕业设计.doc

摘 要 OPC是微软OLE技术在工业控制领域建立的一套符合工业控制要求的通信接口规范。基于OPC 规范,控制软件可以高效、稳定地对硬件设备进行数据存取操作,极大地提高了控制系统的互操作性和适应性。OPC 将现场信号按照统一的标准与控制管理软件无缝连接,将硬件和应用软件有效地分离。针对当前污水处理控制系统的规模不断扩大、监控设备日益复杂、性能日益提高的状况，传统的监控模式已经制约了污水处理控制系统的发展。为此构建了一种于0PC技术和CAN现场总线技术的分布式污水处理控制系统体系结构。实现现场设备和监控软件的无缝集成。结合着活性污泥法污水处理工艺流程，说明了监控系统的硬件基本结构。给出了采用VB6.0开发了0PC客户应用软件的标准0PC接口的程序。在实际应用中该方法取得良好的效果。 关键词: OPC(OLE for Process Control)；工业控制；通信接口 ABSTRACT OPC is a set of communication interface norms which are established on the basis of Microsoft OLE technology in the industrial control field and which accord with the requirements of industrial control. According to the OPC norm , cont rol2software can efficiently and stably carry on a data access operation to the hard2 ware equipment and greatly improve the mutual operability and adaptability of the cont rol2system. The OPC technique connect s the spot signal to the cont rol2management software according to the uniform standards ,and also effectively separates the hardware from the internet application software. Aim at the condition that control scale is extending continuously，equipments become complicated and its function raise increasingly in the process of sewage disposed monitor system，traditionary monitor mode have restricted the development of sewage disposed monitor system．A distributed system structure of sewage disposed monitor system based on 0PC technology and CAN—Field Bus technology was constituted． Seamless integration between 10caIe equipment and monitor software was carried out． The hardware structure of the monitor system was introduced associated with the sewage disposed craft． The program developed by VB6.0 of the 0PC interface of 0PC client application software was provided．The experimental result shows satisfactory feasibility of the method． Keywords: OPC(OLE for Process Control); industrial control; communication interface 目 录 前言 第一章 OPC简介 1 1. OPC摘要 5 第二章 使用visual basic开发OPC应用程序 5 1 建立一个visual basic 工程 9 2 建立一个OPC对象 9 2.1 变量声明 10