OPC Unified Architecture简称OPC UA,是OPC Foundation在2008年释出的工业自动化通讯标准技术。目的在整合原先发表的OPC DA、HA、AE等技术标准,完整呈现实时的资料读写、历史资料的访问以及事件与警告的发布等功能。透过可靠的跨平台架构设计让OPC UA摆脱了过往OPC DA等对Windows平台的依赖,让OPC产品从微控制器到IT机房等各式环境皆可布署,完善了OPC资料与事件的传输与互通性。另外,在安全性也提供了Server与Client之间使用者的帐号验证与权限审核机制,保障了服务的隐匿性与信息传送的私密性。 The OPC Unified Architecture, or OPC UA for short, is the standard industrial automation communication technology released by the OPC Foundation in 2008. Purpose To integrate the previously published technical standards such as OPC DA, HA, AE and so on, to provide real-time reading and writing of data, access to historical data, and issue of events and warnings. Through the reliable cross-platform architecture design, OPC UA can get rid of the dependence on Windows platforms such as OPC DA in the past, enabling OPC products to be deployed in a variety of environments, from microcontrollers to IT rooms, and perfecting the transmission of OPC data and events And interoperability. In addition, the security also provides the user account verification and authorization review mechanism between Server and Client, which ensures the occult service and the privacy of information transmission.