摘要运输带广泛用于建材、化工、煤炭、电力、冶金等部门，适用于常温下输送非腐蚀性的无尖刺的块状、粒状、粉末的多种物料、如煤炭、焦炭、砂石、水泥等散物（料）或成件物品，输送堆积密度为6.5~2.5t/m3的各种块状、粒状、粉状等松散状物料，也可用于成体物品输送。49106
本设计中，利用PLC和触摸屏，设计一个板材输送单元的控制系统。在控制系统中，每个运输带既可以手动控制，又可以自动控制。手动控制时，既可以控制一条运输带，又可以控制多条运输带。控制多条运输带时，各运输带既可以以相同的速度运行，又可以以不同的速度运行。自动控制时，各运输带以相同的速度运行，自动控制启动后，一号运输带立即启动，为了防止运输带上物料的堆积，2号，3号，4号运输带，每隔5秒顺序启动。
本系统中的操作动作都在触摸屏上完成，在登陆系统后，可进行手动控制和自动控制，急停，以及报警的确认等工作。
毕业论文关键词：触摸屏，PLC，运输带
Abstract
Transportation tapes are widely used in building material, chemical, coal, electric power, metallurgy and other departments,massive, granular , powder of a variety of materials , such as coal, coke, sand and gravel , cement and other bulk material ( material ) , or items applicable to conveying non- corrosive spikes at room temperature,transport packing density of 6.5~2.5t/m3 various massive, granular, powder and other bulk materials,can also be used for adult goods transportation.
In this design , the use of PLC and touch screen control system design of a sheet conveying unit . In the control system , the conveyor belt can manually control can be automatically controlled .Manual control , not only can control a conveyor belt , they can control the conveyor belt .Control the conveyor belt when the conveyor belt can either run the same speed , they can run at different speeds .Automatic control , the transport belt running at the same speed , One conveyor belt to start immediately after the start of the automatic control , in order to prevent the accumulation of the conveyor belt material on the 2nd , the 3rd , the 4th conveyor belt , every order of 5 seconds to start.
The action of the operating system on the touch screen in the landing system , manual control and automatic control , emergency stop , and alarm acknowledgment .
Keywords：PLC ,Touch screen ,conveyor belt
目 录
第一章 绪论 1
1.1 学术背景 1
1.2 理论与实际意义 1
1.4 研究内容 3
第二章 可编程控制器简介 4
2.1 可编程控制器简介 4
2.1.1 可编程控制器工作原理 4
2.1.2 可编程控制器功能特点 5
2.1.3可编程控制器功能的选择 5
2.2 S7-300 可编程控制器 7
2.2.1 西门子的编程软件和程序结构 7
第三章 触摸屏简介 10
3.1 触摸屏简介 10
3.1.1 触摸屏的特性 10
3.1.2 触摸屏工作原理 11
3.2 西门子触摸屏的一般特性 11 PLC和触摸屏的板材输送单元控制系统设计+CAD图纸:http://www.youerw.com/jixie/lunwen_51949.html