基于ERTEC 200P的PROFINET工控网关的研制

发布时间：2019-04-03 07:35

【摘要】：随着工业现场通信总线技术的发展,PROFINET逐渐成为了诸多工业设备之间相互通信的主流技术。而目前工业现场所广泛使用的传感器、执行器、智能仪器仪表等,多通过内嵌单片机提供串行接口,实现与外部系统的串行通信。因此,通过研发一种PROFINET网关,该网关可实现将嵌有Modbus协议的设备通过RS-485接入PROFINET网络,具有重要意义。本文根据工控现场通信需求,通过对PROFINET协议和Modbus协议以及PROFINET网关技术的研究与分析。采用西门子提供的工业以太网专用器件系列的ERTEC 200P芯片作为主理器,同时外扩了高速大容量SDRAM存储器、NOR Flash存储器及其他接口电路,形成基于ERTEC 200P的硬件板。在该硬件板上运行e Cos嵌入式实时操作系统、PROFINET协议栈,并在协议栈上层做应用开发。设计一款基于芯片STM32F103VET6的拓展板,在拓展板上运行Modbus协议主站程序,拓展板提供RS-485与工业现场设备连接,在拓展板上做应用开发。基于ERTEC 200P的硬件板与基于STM32F103VET6的拓展板通过11路GPIO连接,共同组成PROFINET网关的硬件。最后,本文通过搭建硬软件平台,对嵌入Modbus协议的设备与嵌入PROFINET协议的设备的通信交互进行了软硬件联机调试,并针对该系统性能指标进行了实验测试。测试结果:从Modbus协议从站端发送数据,PROFINET协议端能接收到对应的数据;从PROFINET协议端发送数据,Modbus协议从站端能接收到对应的数据,具有诊断功能,完成了该网关的功能性研制,具有一定的实用价值。
[Abstract]:With the development of industrial field communication bus technology, PROFINET has gradually become the mainstream technology of communication between many industrial equipment. At present, the sensors, actuators, intelligent instruments and so on, which are widely used in the industrial field, provide the serial interface through embedded single-chip microcomputer to realize the serial communication with the external system. Therefore, through the development of a PROFINET gateway, it is of great significance that the devices embedded with Modbus protocol can be connected to the PROFINET network through RS-485. According to the requirements of industrial control field communication, this paper studies and analyzes the PROFINET protocol, Modbus protocol and PROFINET gateway technology. The ERTEC 200p chip of industrial Ethernet device series provided by Siemens is used as the main processor, and the high speed and large capacity SDRAM memory, NOR Flash memory and other interface circuits are expanded externally to form the hardware board based on ERTEC 200p. This hardware board runs e-Cos embedded real-time operating system, PROFINET protocol stack, and makes application development in the upper layer of the protocol stack. A development board based on chip STM32F103VET6 is designed, which runs the master station program of Modbus protocol on the expansion board. The expansion board provides the connection between RS-485 and industrial field equipment, and makes application and development on the expansion board. The hardware board based on ERTEC 200p and the expansion board based on STM32F103VET6 are connected by 11 GPIO channels to form the hardware of PROFINET gateway. Finally, by building a hardware and software platform, the communication between the devices embedded in Modbus protocol and the devices embedded in PROFINET protocol is debugged on-line, and the performance index of the system is tested by experiments. Test results: from the Modbus protocol to send data from the station end, the PROFINET protocol terminal can receive the corresponding data; The data is sent from the PROFINET protocol and the Modbus protocol can receive the corresponding data from the station, which has the diagnostic function. The functional development of the gateway is completed, which has a certain practical value.
【学位授予单位】：西南科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN915.05

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