PROFIBUS-DP和MODBUS集成化从节点装置研究

发布时间：2018-03-27 04:53

本文选题：PROFIBUS-DP　切入点：MODBUS　出处：《天津理工大学》2013年硕士论文

【摘要】：PROFIBUS-DP是面向流程自动化和工厂自动化的一种国际性现场总线,是一种开放的、具有广泛应用范围的数字通信系统,适合于可靠性要求高、快速和时间要求严格的各种通信环境。MODBUS通信协议是起初应用于电子控制器领域的一种通信协议,通过MODBUS协议,可以实现不同控制器之间,以及控制器通过网络(如Internet)和其它设备进行通信。目前,与PROFIBUS-DP和MODBUS总线相关的产品种类也已很多,其中相关从站设备(如数字传感器、变送器、仪表与执行机构等)更是现在研究的关键技术。但是目前国内外有关多协议集成化的研究并不多见,所以本文研究设计了一种PROFIBUS-DP和MODBUS集成化从节点装置,实现了该模块在两个从节点功能上的快速切换。主要内容包括： 1、首先介绍了两种现场总线的国内外发展基本现状以及本课题的研究内容和意义,然后全面的分析了PROFIBUS-DP和MODBUS两种现场总线的体系结构、通信原理与数据格式。 2、在分析两种现场总线共用技术的基础之上深入研究并实现在一块微处理器上集成两类从节点,并解决两类从节点功能切换的问题,同时给出了集成化从节点模块的总体设计方案,在此基础上阐述了软硬件上的具体解决方法。在硬件设计上实现了以单片机、SPC3协议芯片和RS485驱动电路为核心的PROFIBUS-DP从节点功能以及单片机和RS485驱动电路为核心的MODBUS从节点功能,最后对硬件电路的工作原理进行了说明。在软件设计上采用C51语言分别编写两种现场总线的从节点功能代码,在此基础上将其合并为一个集成化从节点代码。 3、根据PROFIBUS-DP和MODBUS从站测试相关的功能与技术要求,对本模块的测试方案进行了详细的分析与论证。分别搭建两个从节点模块的测试实验平台,进行了实验测试,并对实验结果进行了分析,并论证了论文所提出的PROFIBUS-DP和MODBUS集成化从节点模块方案是正确可行的。
[Abstract]:PROFIBUS-DP is an international field bus for process automation and factory automation. It is an open digital communication system with a wide range of applications and is suitable for high reliability requirements. The communication protocol .Modbus, which is fast and time demanding, is a kind of communication protocol originally applied in the field of electronic controller. Through MODBUS protocol, different controllers can be realized. And the controller communicates through the network (such as Internet) and other devices. At present, there are many kinds of products related to PROFIBUS-DP and MODBUS bus, including related slave station equipment (such as digital sensor, transmitter, etc.). Instruments and actuators are the key technologies of current research. But there are few researches on multi-protocol integration at home and abroad, so this paper studies and designs a kind of PROFIBUS-DP and MODBUS integrated slave node device. The fast switching between the two slave nodes is realized. The main contents are as follows:. 1. Firstly, this paper introduces the basic development situation of two fieldbus at home and abroad, and the research content and significance of this subject, then analyzes the architecture, communication principle and data format of PROFIBUS-DP and MODBUS. 2. Based on the analysis of two common fieldbus technologies, the integration of two slave nodes on a single microprocessor is studied and realized, and the problem of functional switching between two slave nodes is solved. At the same time, the overall design scheme of the integrated slave module is given. On the basis of this, the concrete solution of hardware and software is expounded. In hardware design, the functions of PROFIBUS-DP slave node based on MCU SPC3 protocol chip and RS485 driver circuit and MODBUS slave node function with MCU and RS485 drive circuit as the core are realized. Finally, the working principle of the hardware circuit is explained. In the software design, the slave node function codes of two kinds of fieldbus are compiled by using C51 language, and on this basis, it is merged into an integrated slave node code. 3. According to the functions and technical requirements of PROFIBUS-DP and MODBUS slave station test, the test scheme of this module is analyzed and demonstrated in detail. The experimental results are analyzed, and it is proved that the proposed scheme of PROFIBUS-DP and MODBUS integrated slave module is correct and feasible.
【学位授予单位】：天津理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TP336;TP273

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