嵌入MODBUS协议的涡街流量计数字传输系统设计

Digital transmission system design of the vortex flow-meter inserted the MODBUS agreement

针对工业能源计量管理系统的实际需求,设计基于MODBUS协议的计量数据通信系统.涡街流量计(下位机)由飞思卡尔(Freescale)单片机实现嵌入MODBUS协议的数据采集和显示;上位机用VB 6.0编写基于MODBUS协议的程序,实现数据在上位机界面显示,并且将采集的数据值保存到SQLsever2000数据库,上位机与下位机之间通过RS-485总线通讯,最终能够实现能源计量数据的远程自动采集与管理.

According to industrial energy measurement management system on account of the actual requirement,measurement-data communication system was designed based on MODBUS agreement.The vortex flow-meter（lower position machine） realized the data acquisition and the demonstration by the Freescale single chip microcomputer embedded MODBUS agreement.The superior machine（PC） compiled program with VB 6.0 based on the MODBUS agreement,had the data showed on the PC screen,and saved the gathered data value in the SQLsever2000 database.Communication between the lower position machine and the PC through the RS-485 bus had completed long-distance automatic gathering and the management of energy measurement data.