摘要
本文介绍如何利用西门子PLC采集智能仪表测量进气速度,累计进气量,温湿度,舱内外压差等数据,并控制变频器来调节风机。PLC通过Rs-485总线采集智能仪表测量数据s7-200PLC通过PPI通信线与上位机通信,WINCC与PLC实现通信,vb界面与wi ncc通信,控制现场设备,实时读取检测现场数据,对数据进行统计,生成实验数据报告。实现可视化操作,自动测试系统气密性,并生成检测报告。
The paper introduces how to get data such as velocity of the air input,temperature,humidity, pressure, and control the fan by controlling the inverter. PLC get the data through RS-485bus.s7-200PLC communicates with host computer through PPI wire.WINCC communicates with PLC,then vb communicates with WINCC,then we can control equipment in the field.,get the data in the real time,deal with the data,generate the report.it can make the operation visible,tests the tightness automatically,generates the test report.
