论文编号:ZD877论文字数:17570,页数:34
摘 要
随着人们生活水平的逐步提高，对供水系统的要求也越来越高。传统供水系统大多采用水塔、高位水箱或气压罐式增压设备等。传统的控制方式存在控制精度低、能耗大的缺点，势必与人们日益增长的生活水平不相适宜。为了达到节能的目的, 提高供水系统的质量，本次设计采用PLC技术来实现水塔水位的自动控制，该控制系统有着更高的控制精度，用户水压调节及时，波动小，效果良好。同时，具有结构简单，制造成本低，节约能源等优点。
关键词：PLC；水塔水位；自动控制
Abstract
As people‘s standard of living gradually increased, the requirements of water supply systems are increasingly higher .Most of the traditional water supply system using water tower, tank or high pressure tank pressurization equipment.Traditional control method have some shortcomings such as lower control accuracy, higher energy consumption , and it certainly not be seasoned with people’s increasing standard living standard .To save energy, improve the quality of water supply systems, this design uses PLC technology to achieve water level autocontrol system of water tower, this control system has higher control precision, and make the hydraulic pressure regulate of user be more in time and efficiency, regulating fluctuations be smaller, And also ,this control system have some advantage such as a simple structure, low cost, saving energy and so on.
Keywords：PLC;water level of water tower ;automatic control
目 录
摘 要II
AbstractIII
1 前 言1
2 PLC概述2
2.1 PLC的组成2
2.2 PLC的工作原理6
2.3 PLC的编程语言8
2.4 PLC的分类12
2.5 PLC与继电器控制系统的区别13
2.6 PLC的控制系统结构15
3 PLC机型的选择17
3.1 选择机型的方法17
3.2 西门子PLC系列产品介绍19
3.3 SIMATIC S7-300 PLC的结构体系20
4 水塔水位控制系统的设计22
4.1 总体设计方案22
4.1.2 系统硬件结构22
4.1.3 系统总体软件结构23
4.2 水塔水位控制系统工作原理24
4.3 PLC控制的设计25
4.3.1 输入输出列表25
4.3.2 程序的设计26
4.3.3 系统的调试28
5 总 结29
致 谢30
参考文献31
基于PLC的水塔水位控制系统设计......