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。
Finally, data traffic technology, OPC, is introduced and application of OPC Server is also discussed in the monitoring and control system.
最后论文对底层数据交换技术——OPC服务器进行了详细介绍，并且阐述了该技术在系统中的应用。
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。
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。
Via the test the designed OPC client can connect all the OPC servers in the building successfully, read and write data from OPC server stably and effectively.
测试实验结果表明，本文所设计的OPC客户端应用程序能够成功连接大楼内各子系统设备的OPC服务器，并且能够稳定、有效地对服务器进行数据读写操作。
OPC Standard is selected as upper layer interface in contrast with EPA Specification as bottom layer interface in EPA Data Server based on OPC.
基于OPC标准的EPA数据服务器选择OPC标准作为上层接口，选择EPA规范作为底层接口。
What is more, architecture and communication is analyzed and OPC client is designed to read data from OPC server local or remote.
分析了OPC的体系结构和通讯方式，设计了OPC客户端，使其能够读取本地或者远程的OPC服务器；
What is more, architecture and communication is analyzed and OPC client is designed to read data from OPC server local or remote.
分析了OPC的体系结构和通讯方式，设计了OPC客户端，使其能够读取本地或者远程的OPC服务器；
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