Modbus协议在温湿度环境监控系统集成中的应用

Application of Modbus Protocol in The System Integration of Temperature and Humidity Environment Monitoring

采用SIMATIC语言编程实现了基于Modbus协议下的S7-200 PLC通讯程序和用VC++实现的上位监控软件通讯程序,实现了温湿度环境监控系统中PLC控制器的监控数据功能集成。

This paper programs the Modbus slave in S7 - 200 PLC by using SIMATIC language and the Modbus master of the up monitoring software by using VC ＋ ＋ language, develops monitoring data integration of PLC controllers in temperature and humidity environment system.