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一、OPC规范 长期以来,监控系统面临的一个挑战就是如何方便而迅速地集成现场各个设备中的数据。由于不同厂家的设备存在不同的通信机制,开发商就必须花费大量的精力和时间去构造底层的系统,以实现数据的集成。同时,由于不同的开发商编写的访问接口不尽相同,相互之间不能实现通信,不能实现软件的共享,造成重复投资。 解决方法之一就是由硬件生产厂家提供访问接口,而由用户去调用。但是,如果各个厂家采用各自独特的方式开发接口的话,用户要去熟悉各个接口,使用起来仍然不便。为此,由OPC Task Force(OLE for Process Control Task Force)制
First, the OPC standard For a long time, the monitoring system is facing a challenge is how to quickly and easily integrate the data in the field of each device. Due to the existence of different communication mechanisms between devices from different manufacturers, developers must spend a lot of effort and time to construct the underlying system in order to achieve data integration. At the same time, due to different developers to write different access interfaces, can not communicate with each other, can not achieve the sharing of software, resulting in duplication of investment. One solution is to provide access to the interface by the hardware manufacturer, but by the user to call. However, if each manufacturer uses its own unique way to develop the interface, the user is not familiar with the various interfaces and is still inconvenient to use. For this purpose, it is made by OPC Task Force (OLE for Process Control Task Force)