电气工程及其自动化专业【毕业设计 文献综述 开题报告】基于RS485通讯的智能仪表数据采集系统的设计（可编辑）.docVIP

电气工程及其自动化专业【毕业设计+文献综述+开题报告】基于RS485通讯的智能仪表数据采集系统的设计 Based on RS485 communication intelligent instrument data acquisition system design Abstract In the test control system, data acquisition system as one of the main part for testing management and control, real-time provide data and experimental personnel to provide important basis for product performance analysis. PLC control data acquisition systems currently in industrial automatic pasting control the most widely used in the field. Compared with other microcomputer PLC, the more suitable for in bad industrial environments, and data processing functions have been enhanced, featuring modularization programming instructions, can solve function in situ programming, monitoring, communications, and other problems. This paper mainly introduces the principle of serial communication, through the analysis of the temperature control meter communication protocol and relevant operation, use the serial port debug software testing part, can ensure so instructions commands the correctness of temperature control instrument and determine whether can normal communication. Then use yonghong PLC programming software WinProLadder write the data acquisition system programming ladder diagram, and procedure of part explanation. Finally, using configuration software for the data acquisition system configuration, made the main screen and its temperature curve and reporting systems. Keywords: RS-485 Serial Communication,Intelligent Temperature Control Meter, Communication Protocol, PLC, Configuration Software 摘 要 III Abstract IV 第一章 绪论 1 1.1 课题的来源 1 1.2 课题的意义 1 第二章 数据采集系统的发展现状 2 2.1 RS-485、智能仪表及数据采集系统的国内外发展现状 2 2.1.1 RS-485的研究现状 2 2.1.2 智能仪表的研究现状 2 2.1.3 数据采集系统的研究现状 4 2.2 课题研究的主要内容 4 第三章 数据采集系统的的总体设计 6 3.1 数据采集系统的方案设计 6 3.2 该数据采集系统现场布线应注意的问题 7 第四章 数据采集系统的具体设计 8 4.1 智能仪表的相关操作以及参数的设定 8 4.2 串口通讯 11 4.3 PLC的编程 16 4.3.1 PLC的联机 17 4.3.2 实际温度的读取 18 4.3.3 温度异常的报警 21 4.3.4 设置设定温度 22 4.3.5 计算指令的校验码 23 4.4组态软件 24 第五章 总结 27 参考文