Abstract: The interoperation problem of field device based on Ethernet for plant automation (EPA) and the other field standards is analyzed, and the characteristics of OLE for process control (OPC) are studied. Based on the analysis, OPC server based on EPA is designed and introduced. Furthermore, data-collection of the remote supervised system based on OPC, OPC client, interacts with the OPC server to read data from the field device. The result indicates the practicability of the design.

Key words: Ethernet for plant automation(EPA), OLE for process control(OPC), Component object model(COM), Interoperation

摘要： 针对EPA设备与其它标准设备间的互操作性问题，研究了OPC技术特点，在此基础上设计了基于EPA的OPC服务器模型并阐述了该模型。开发了一个基于OPC技术的无线监控系统，该系统的数据采集模块通过OPC服务器读取无线温度变送器的数据，验证了该设计的可行性。

关键词: EPA, OPC, COM, 互操作性