基于Modbus协议的PLC与智能仪表的通讯  

Communication Between PLC and Intelligent Instruments Based on Modbus Protocol

作　　者：吴永强[1] 陈宏图[1] 

机构地区：[1]东风汽车有限公司东风商用车技术中心,十堰442001

出　　处：《汽车科技》2009年第5期52-54,共3页Auto Sci-Tech

摘　　要：介绍了Modbus协议的特点和SIEMENS S7-300 PLC与Honeywell UDC3500智能仪表之间的通信原理,给出了采用Modbus RTU协议的通信程序,实现了S7-300 PLC与智能仪表间的双向通信。This paper introduces the characteristics of Modbus protocol and the principle of communication between SIEMENS S7-300 PLC and intelligent instrument of Honeywell UDC3500.It presents communication program based on Modbus RTU protocol, and realized intercommunication between S7-300 PLC and intelligent instrument.

关 键 词：Modbus现场总线协议 SIEMENS PLC 智能仪表 

分 类 号：U467.3[机械工程—车辆工程]