基于嵌入式STM32的Modbus RTU协议实现  

Implementation of Modbus RTU Communication Protocol Based on STM32

作　　者：宋磊[1] 彭道刚[1] 赵斌斌[1] 黄丽[1] 

机构地区：[1]上海电力学院自动化工程学院

出　　处：《仪表技术》2014年第11期33-36,54,共5页Instrumentation Technology

基　　金：上海市"科技创新行动计划"高新技术领域项目(14511101200);上海市部分地方院校能力建设专项项目(13160500700);上海市电站自动化技术重点实验室开放课题(13DZ2273800)

摘　　要：随着工业现场总线技术的快速发展,Modbus协议以其高效性、可靠性,广泛应用于电力行业。为了提高电厂对数据采集的可靠性和实时性,提出了将Modbus通信协议与32位STM32F103ZE微处理器相结合的设计方案,介绍了系统的总体设计方案和Modbus通信协议的内容。在嵌入式实时操作系统μC/OS-II上实现了基于Modbus RTU通信协议的主站和从站的通信,并详细讨论了Modbus通信协议中CRC校验码的生成。实验结果表明,该方案有效地实现了Modbus协议,可以广泛地应用于电厂和其他工业现场。With the rapid development of industrial field bus technology, the Modbus protocol is widely used in electric power industry because of its high efficiency and reliability. In order to improve the reliability and real-time performance of data acquisition of the power plant, this paper puts forward a design of Modbus communication protocol with a 32-bit STM32F103ZE microprocessor. The overall design scheme of the system and the content of Modbus Communication Protocol are introduced. The communication between master station and slave station is implemented based on the Modbus RTU communication protocol in the embedded real-time operating system μC/OS-Ⅱ.The generation of Cyclic Redundancy Check in the Modbus Communication Protocol is discussed. The experimental results show that the scheme has realized the Modbus protocol effectively, which can be widely used in power plants and other industrial field.

关 键 词：嵌入式系统 MODBUS协议 数据采集 STM32处理器 μC/OS-Ⅱ 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]