According to OPC data access specification, develop OPC server program using MFC and object-oriented design patterns.
根据OPC数据存取规范，运用MFC和面向对象的设计模式开发OPC服务器程序。
OPC Data Access (DA) primarily provides vertical data integration and interoperability between measurement and automation systems on the manufacturing floor and client application.
主要是提供现场层和应用软件间的纵向的数据集成和互操作。
OPC technology provide standardized interfaces, by which applications are able to access data in a standard way.
OPC技术提供了标准化访问接口，应用程序可以使用一致的方式访问设备中的数据。
OPC historical data access Server provides a kind of standard mechanism of data access for the users who are interested in historical data.
OPC历史数据服务器提供了一种标准的历史数据访问机制给那些对历史数据感兴趣的用户。
This paper briefly introduces the background of OPC technology and its data access specification.
介绍了OPC技术产生的背景以及OPC数据存取规范。
The basic structure of OPC and the standard of data access are researched in the paper. The automation interface object model is analyzed.
研究了OPC的基本结构和数据访问标准，重点分析了自动化接口的对象模型。
OPC applies OLE (Object Linking and Embedding) technology into Industry Process Control Fields, and provides a kind of standard data access method.
OPC把对象链接和嵌入技术应用于工业过程控制领域，为工业控制领域提供了一种标准的数据访问机制。
The mission that this article wants to solve is how to develop the OPC historical data access Server.
本文要解决的任务就是如何开发OPC历史数据服务器。
In chapter 2, the interface object model and Data Access Specification of OPC are researched.
第2章对OPC接口对象模型、数据访问规范进行了系统的研究。
In chapter 2, the interface object model and Data Access Specification of OPC are researched.
第2章对OPC接口对象模型、数据访问规范进行了系统的研究。
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