OPC is a software data interchange standard interface and specification, which has nothing to do with the manufacturer, and provides the advanced technology to solve this issue.
OPC是与厂商无关的软件数据交换标准接口和规程，为解决这一问题提供了先进的技术手段。
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 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。
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