Modbus通讯的模式和参数设定对网络通讯速率影响的研究  

Study on Influence of Modbus Communication Mode & Setting on Network Communication Rate

作　　者：卫冬生 伍浩坪 赵红恩 陈佳[1] 陈祖睿 郭宏 WEI Dong-sheng;WU Hao-ping;ZHAO Hong-en

机构地区：[1]中国船舶重工集团公司第七一一研究所

出　　处：《电站系统工程》2019年第1期61-64,共4页Power System Engineering

摘　　要：在巴基斯坦Fatima 2×60 MW蔗渣电站项目的调试工作中,遇到了各类Modbus通讯问题。在问题确认和调试实验的过程中,进行了大量的关于Modbus通讯的理论分析和实验研究。对于其中通讯延迟类问题进行分析后,得出经验和结论:基于TCP/IP协议的Modbus通讯,其通讯速率受通讯报文长度(报文字节数量)影响很小。而主要影响因素为:Modbus主站Query报文的发送间隔和报文循环发送周期、Modbus从站应答速度、主从站之间用于信息交互的报文数量。Modbus communication problems has occurred in the debugging of Fatima 2×60MW Bagasse &Coal Power Plant Project in Pakistan.And in the process of problem confirmation and debugging experiments,we have done lots of analysis in theory and study with experiments.The following conclusion has been made after we analyzed the communication delay problems:the communication rate of Modbus communication based on TCP/IP protocol is rarely influenced by communication packet length (the quantity of byte),but mainly influenced by delivery interval and cycle of Query messages from Modbus Master to Modbus Slave,response speed of Modbus Slave,and the number of messages for information exchange between Modbus Master and Slave.

关 键 词：MODBUS TCP/IP 报文发送周期 通讯延迟 通讯速率 

分 类 号：TK32[动力工程及工程热物理—热能工程]