论文中英文翻译(原文)

编号：

桂林电子科技大学信息科技学院

毕业设计(论文)外文翻译

（原文）

系别：电子工程系

专业：电子信息工程

学生姓名：韦骏

学号：0852100329

指导教师单位：桂林电子科技大学信息科技学院姓名：梁勇

职称：讲师

2012 年6 月5 日

Design and implementation of the agreement based on embedded system Modbus Linux

Abstract: with the embedded with the rapid development of computer technology, a new generation of industrial automation data acquisition and monitoring system, adopting the core of high performance embedded microcontroller processor, the system well adapt to the application. It is in line with strict requirements of consumption and other functions, such as reliability, the cost, size and power consumption, etc. In the industrial automation application system, Modbus communication protocol industrial standard, widely applied in large scale industrial equipment system, including DCS, PLC, RTU and intelligent instruments, etc. In order to achieve embedded data monitoring of industrial automation software application needs, this paper designed the embedded data acquisition monitoring the workbench Modbus agreement based on the Linux environment collection system. The serial port is to realize the

master/Modbus agreement from type, including two kind of communication mode: ASCII and RTU. Therefore, all kinds of ointment agreement can meet the Modbus equipment serial communication. In the embedded platform Modbus agreement steady and reliable. It in embedded data monitoring automation of the application system of new acquisitions prospect. Keywords: embedded system, embedded Linux, Modbus agreement, data acquisition and monitoring and control.

1, the introduction

Modbus is a communication protocol, is a company by MoDiKang promotion. It is widely used in industrial automation, has become a real industry standard. The control device or different manufacturer measuring instrument can link to an industry monitoring network use Modbus agreement. Modbus communication protocol can serve as a lot of industrial equipment communication standards, including PLC, DCS system, RTU, intelligent intelligent instrument. Embedded with the rapid development of computer technology, embedded data acquisition monitoring system, using the embedded

high-performance microprocessors as the core, is an important development direction. In the environment of Linux embedded in view of the application of the embedded industrial automation data, a Modbus Lord agreement collection monitoring system design and the realization of the document. Therefore, communication equipment, various ointment agreement can meet the serial Modbus.

2, Modbus agreement profile

Modbus agreement including ASCII, RTU and TCP transfer mode, support the traditional RS-232 and RS-422, RS-485 and Ethernet equipment. As for the serial port Modbus equipment, controller, in standard Modbus network protocol can be based on two transmission mode: ASCII mode or RTU mode. As for Ethernet Modbus equipment, transfer mode is Modbus/TCP protocol. The same transport model and parameters must choose on the network of all equipment Modbus. Modbus agreement is independent of hardware. Instead, the physical layer, it only defines the structure of data, the controller can distinguish. However, network communication is not defined. Modbus agreement stipulated the information and data