Matthias Freund, Christopher Martin, Annerose Braune, Uwe Steinkrauss
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引用次数: 3
摘要
OPC规范为工业自动化中的用户界面、报警服务器等定义了过程数据服务器的通用接口。在最新的OPC规范统一架构(OPC UA)中定义的混合配置文件将消息的有效二进制编码与HTTP(S)传输相结合。这使得纯基于web浏览器的OPC UA客户端不需要像业界经常要求的那样安装任何额外的软件或插件。因此，本文提出了OPC UA JavaScript框架JSUA，它包含了OPC UA通信栈的JavaScript实现。时间测量显示了JSUA在不同设备上的性能，并与用c++实现的本机OPC UA客户端进行了比较。
The OPC specifications define common interfaces towards process data servers for user interfaces, alarm servers, etc. in industrial automation. The hybrid profile defined in the latest OPC specification Unified Architecture (OPC UA) combines an efficient binary encoding of messages with a transmission over HTTP(S). This enables pure web browser-based OPC UA clients that do not need any additional software or plug-ins installed as requested by the industry more frequently. This paper therefore presents the OPC UA JavaScript framework JSUA that incorporates a JavaScript implementation of the OPC UA communication stack. Time measurements show the performance of JSUA on different devices and compared to a native OPC UA client implemented in C++.
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