摘要
介绍了应用台湾泓格HRT-710实现HART与Modbus-RTU的协议转换和后续压力计量系统的搭建过程。HART回路支持点对点和多点两种采集模式,从压力仪表的接线方式(两线内置电阻、两线外置电阻、四线外置电阻)和设备上位机配置软件HG_Tool.exe的配置采集,详细介绍了基于HART协议的压力计量系统的设置过程和工作模式。经测试比较,应用HRT-710压力计量系统可以较稳定地实现工业压力仪表的数据采集和周期标定,比传统串口RS485的Modbus-RTU采集更灵活,不受布线限制且功能稳定高效,达到了预期的设计效果。
It introduces the protocol conversion between Hart and Modbus RTU using Taiwan Hongge hrt-710 and the construction process of subsequent pressure measurement system.Hart loop supports two acquisition modes:point-to-point and multi-point.The connection mode of pressure instrument(two-wire built-in resistor,two-wire external resistor and four-wire external resistor)and the configuration software HG of the upper computer of the device are analyzed_Tool.exe The setting process and working mode of pressure measurement system based on HART protocol are introduced in detail.Through test and comparison,the application of hrt-710 pressure measurement system can stably realize the data acquisition and periodic calibration of industrial pressure instruments,which is more flexible than Modbus RTU acquisition of traditional serial port RS485,which is not limited by wiring and has stable and efficient functions,and achieves the expected design effect.
作者
丁伏林
Ding Fulin(Suzhou Wujiang Inspection and Testing Center,Jiangsu,Suzhou,215200,China)
出处
《仪器仪表用户》
2021年第4期9-12,共4页
Instrumentation
