基于Winform框架的OPC UA通信方法研究与实现

The Research and Implementation of OPC UA Communication Method Based on Winform Framework

摘要: 本文提出并实现了一种基于C#和Winform框架的OPC UA通信方法与系统。介绍了OPC UA通信协议的工作原理，利用基于C#语言的OPC UA开源客户端OPCUaHelper开源库，作为监控系统中OPC UA客户端开发工具，实现对西门子OPC UA服务器的访问。采用消息订阅机制实现对OPC服务器状态数据的实时读取，同时利用数据改变触发事件机制实现控制数据的实时写入。最后，该通信方法在化学品船智能液货系统中进行了试验验证，数据通信实时性满足项目要求。

Abstract: This paper proposes and implements an OPC UA communication method and system based on the C# and Winform framework. The working principle of the OPC UA communication protocol is in-troduced, and the OPCUaHelper open source library of the OPC UA open source client is used based on C# language as the development tool of the OPC UA client in the monitoring system to realize the access to Siemens OPC UA server. The real-time reading of OPC server status data is realized by the message subscription mechanism and the real-time writing of control data is realized by the data change triggering event mechanism. Finally, the communication method is tested and verified in the intelligent liquid cargo system of the chemical tanker, and the real-time data communication meets the project requirements.