LabVIEW与基于Modbus协议的温度控制器通信研究

摘要

温度控制软件是工业控制软件中的一类，对温度数据采集有严格要求。为了能够准确实现温度数据的采集和表示，首先总结了温控数据的主要特点，对Modbus协议和地址规范做了介绍。在此基础上对LabVIEW与基于Modbus协议的温控硬件设备通信模式进行了研究，对通信过程中可能出现的一些问题做出分析，并予以解决。最后在横河电机的UP35A温控调节器上进行了编程实验。实验结果表明这一通信模式能够较好地满足温控数据采集的要求。%Temperature data collection is one of the critical issues in temperature control software.To solve the problem of accurateness in collection and display of temperature data,speciifcation of the Modbus protocol and address,as well as characteristics of the temperature data are introduced briefly at first,based on which the communication model between LabVIEW and Modbus-supported hardware is studied and programmed on Yokogawa UP35A.Results show that model can meet the requirements of temperature control data collection and display better.