摘要
提出了一种面向小环境的恒湿系统设计方案;以RS-485总线为信号传输媒质,以MODBUS协议作为系统通信协议,实现了系统内部各单元间的可靠通信以及系统与其他使用MODBUS协议的智能仪表间的快速连接与组网;给出了系统与上位机间的互连形式和上位机端MODBUS消息帧的接收实现方法。
The paper presents a design for the mieroenvirortment humidistat system that uses Modbus as the communication protocol via the RS - 485 network. The system design guarantees the reliable communication inner the system and makes it possible that the whole system and each unit of the system can connect with other intelligent devices which accords with the Modbus protocol. Also, the connection between the system and the supervisor computer as well as the receiving method of Modbus message frame in PC is shown in the paper.
出处
《仪表技术与传感器》
CSCD
北大核心
2006年第1期35-37,共3页
Instrument Technique and Sensor
