【摘要】 OPC(OLEforProcessControl)规范是为了解决不同厂商提供的过程控制设备和商业应用软件之间不能自由通信的问题。介绍了以OLE COM DCOM技术为基础的OPC技术,给出了OPC服务器的整体结构及数据采集方法,论述了OPC服务器中COM(ComponentObjectMod el)技术:通报连接机制、连接点对象机制,以及COM中的几个关键概念:COM组件、COM对象、COM接口。指出OPC与COM是密不可分的,OPC技术具有广泛的应用领域。更多还原

【Abstract】 OLE for process control (OPC) is to resolve the problem that process control equipment and commerce application soft from different factory can not communicate freely.OPC technique based on OLE/COM/DCOM technique is introduced.The component object model(COM) technique in OPC server is discussed including advisory connection mechanism,connection object mechanism,as well as several key concept of COM:COM component,COM object,COM interface.更多还原