对采用Modbus通讯协议的压力变送器检定方法的探讨  

Discussion on the verification method of pressure transmitter using Modbus communication protocol

作　　者：张蕾 薛飞[1] 朱志宏[1] ZHANG Lei;XUE Fei;ZHU Zhihong(Jiangyin Measurement and Testing Institute,Jiangyin 214400,China)

机构地区：[1]江阴市计量测试检定所,江苏江阴214400

出　　处：《工业计量》2024年第2期11-13,共3页Industrial Metrology

摘　　要：依据JJG 882—2019《压力变送器》检定规程,压力变送器的常见输出信号为标准电压或电流信号,也有采用符合通讯协议的数字量作为输出信号的,由于标配的标准器无法读取数字量,导致检定工作无法开展。文章采用VB6.0语言,调用Mscomm控件,编制串口通讯软件,读取压力变送器的输出信号,完成检定工作,为此类问题的解决提供了一个思路。According to the verification regulation of Pressure Transmitter《JJG 882—2019》,the common output of pressure transmitters is a standard electrical signal,but some also use communication protocols as output signals.At this time,the standard device cannot read the communication protocol data,resulting in verification failure.The author uses VB6.0 programming language and Mscomm control to develop a serial port communication software,which read the output signal of the pressure transmitter,and completes the verification work.This provides a practical idea for solving such problems.

关 键 词：压力变送器 RS485接口 Modbus_RTU通讯协议 VB6.0语言 

分 类 号：TH812[机械工程—仪器科学与技术]