机电专业毕业设计-基于plc的传送带控制系统设计.doc

机电专业毕业设计-基于PLC的传送带控制系统设计



基于PLC的传送带的控制系统设计
摘 要
介绍了PLC在四节传送带控制系统中的应用，同时也详细地叙述了系统中相关控制项目的设计方案及具体实现方法。文中还介绍了基于PLC与单片机的区别使我们能更加的清楚认识PLC，对学生熟悉PLC控制系统的结构和工作原理以及学习梯形图的编写都有很大的帮助。
 本系统是对四节传送带控制的系统，该设备适用于流水线生产等，也可以把生产出的货物进行传送到特定的地方。
高可靠性是电气控制设备的关键性能。PLC由于采用现代大规模集成电路技术，采用严格的生产工艺制造，内部电路采取了先进的抗干扰技术，具有很高的可靠性。从PLC的机外电路来说，使用PLC构成控制系统，和同等规模的继电接触器系统相比，电气接线及开关接点已减少到数百甚至数千分之一，故障也就大大降低。此外，PLC带有硬件故障自我检测功能，出现故障时可及时发出警报信息。在应用软件中，应用者还可以编入外围器件的故障自诊断程序，使系统中除PLC以外的电路及设备也获得故障自诊断保护。
关键词：传送带   PLC 故诊断控制　　可编程控制器  控制

Four conveyer belts simulation control
Abstract
Introduced PLC in four conveyer belts control system application, simultaneously also in detail narrated in the system to be connected the control project design proposal and the concrete realization method. In the article also introduced enables us based on PLC and the monolithic integrated circuit difference even more clearly to know PLC, is familiar with the PLC control system to the student the structure and the principle of work as well as the study trapezoidal chart compilation all has the very big help.
This system is a system which controls to four conveyer belts, this equipment is suitable for the production-runs and so on, also may the cargo which produces carry on transmits to the specific place.
The redundant reliability is the electricity control device essential performance. PLC because uses the modern large scale integrated circuit technology, used the strict production craft manufacture, the internal circuit has adopted the advanced antijamming technology, had the very high reliability. Machine the external circuit said from PLC that, uses the PLC constitution control system, compares with the same level scale relay system, the electrical wiring and the switch contact reduced to several hundred even several 1/1,000, the breakdown also greatly reduces. In addition, PLC has the hardware breakdown self-examination function, appears when the breakdown may promptly send out the warning information. In the application software, the application also may enroll the periphery component the breakdown from the diagnostic program, causes in the system also obtains the breakdown besides the PLC electric circuit and the equipment from the diagnosis protection
Key word:    Control          Programmable  controller
 
目录
摘要…………………………………………………………………………………… ………Ⅰ
Abstract…………………………………………………………………………………… ….Ⅱ
目录…………………………………………….……………………………………………….Ⅲ
引言…………………………………………………………………….………………………..1
第一章 可编程控制器的概述…………………………………………….……………………2
1.1 可编程逻辑控制器（PLC）………………………………………….……………………2
1.2 可编程逻辑控制器（PLC）的产生………………………………….……………………2
1.3 可编程逻辑控制器的特点……………………………………………..…………………..3
1.4 可编程逻辑控制器的分类………………………………………………..………………..5
1.5 可编程逻辑控制器的的发展………………………………………………..……………..6
1.5.1国外的PLC的发展…………………………………………………..…………….6
1.5.2国内的PLC的发展…………………………………………………..…………….7
1.5.3 PLC的展望……………………………………………………………...………….7
第二章 可编程控制器的结构和原理……………………………………………….…………8
2.1 可编程控制器的基本结构………………………………………………………...……….8
2.2 可编程控制器的编程语言…………………………………………………………..……..9
第三章 PLC与继电器，单片机的异同………………………………………………………12
3.1 什么是PLC………………………………………………………………………………..12
3.2  PLC与单片机的区别…………………………………………………………………….12
3.3 PLC与继电器系统的异同…………………………………………………………...…….12
3.4 PLC系统的设计……………………………………………………………………...…….13
   3.4.1 PLC的选型原则………………………………………………………………..…….13
   3.4.2 可编程顺序控制器的设计流程…………………………………………….……….14
3.5 PLC的自动检测功能及故障诊断………………………………………………..………..15
   3.5.1 超时检测………………………………………………………………….………….15
   3.5.2 逻辑错误检查………………………………………………………….…………….16
第四章  传送带的介绍……………………………………………………….……………….17
  4.1 传送带常见的故障由与维护……………………………………….…………………..17
     4.1.1 传送带常见的故障………………………………………………………………..17
     4.1.2 传送带跑偏………………………………………………………………………..17
 4.2 四级传送带的设计………………………………………………………………………18
    4.2.1 四级传送带的控制要求………………………………….………………………..18
    4.2.2 四级传送带的视图……………………………………..………………………….19
    4.2.3 输入、输出分配表…………………………………….…………………………..20
    4.2.4 电动机接线图………………………………………….…………………………..20
    4.2.5 PLC接线图…………………………………………...…………………………….21
    4.2.6 控制面板……………………………………………...……………………………21
    4.2.7 程序梯形图…………………………………………..…………………………….22
总结……………………………………………………………….……………………………..27
参考文献…………………………………………………………………………………………1
致谢………………………………………………………………………………………………2
附录………………………………………………………...…………………………………….3