Modbus协议在消防联动远程监控系统中的应用

针对目前建筑物内消防联动设备在实际使用过程中暴露出的问题,研究设计了一种基于Modbus通信协议的消防联动系统.以PC机为主站.带通信接口的智能控制器为从站,Modbus协议实现计算机与现场智能控制器之间的数据传输.介绍了Modbus通信协议和串口通信技术.给出了单片机的RS485通信电路设计方案.以及使用C18编写支持Modbus协议的控制器软件的通信模块设计方法.阐述了基于VC 的上位机监控软件设计的关键技术及实现的具体功能.

Application of Modbus Protocol in Fire Coupling Action Remote Monitoring System

In consideration of the problems of the fire coupling action devices exposed during their actual use in current buildings,a kind of fire coupling action system based on Modbus communication protocol is studied and designed,with PC computer as the master station and the intelligent controller with communication interface as the slave station,and the data transmission between the computer and the site intelligent controller is realized through the Modbus communication protocol. The Modbus communication protocol and the serial port communication technology are described. The design scheme of RS485 communication circuit and the design method of the communication module of the controller software which is written by C18 and supports Modbus protocol are given. The key technology and the realized special functions based VC upper computer monitoring software design are also elaborated.