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论文编号:ZD044 字数:7007,页数:35
摘 要
PLC可编程序控制器：PLC英文全称Programmable Logic Controller ,中文全称为可编程逻辑控制器，定义是:一种数字运算操作的电子系统，专为在工业环境应用而设计的。它采用一类可编程的存储器，用于其内部存储程序，执行逻辑运算,顺序控制，定时，计数与算术操作等面向用户的指令，并通过数字或模拟式输入/输出控制各种类型的机械或生产过程.
PLC是基于电子计算机，且适用于工业现场工作的电控制器。它源于继电控制装置，但它不像继电装置那样，通过电路的物理过程实现控制，而主要靠运行存储于PLC内存中的程序，进行入出信息变换实现控制。 入出信息变换、可靠物理实现，可以说是PLC实现控制的两个基本要点。 入出信息变换靠运行存储于PLC内存中的程序实现。PLC程序既有生产厂家的系统程序(不可更改)，又有用户自行开发的应用（用户）程序。系统程序提供运行平台，同时，还为PLC程序可靠运行及信号与信息转换进行必要的公共处理。用户程序由用户按控制要求设计。什么样的控制要求，就应有什么样的用户程序。
Abstract
PLC programmable controller: PLC English full title Programmable Logic Controller, Chinese full title as the programmable logical controller, the definition is: One kind of digital operation operation''s electronic system, for designs specially in the industry environment application. It uses a kind of programmable memory, uses in its internally stored program, the actuating logic operation, the sequential control, fixed time, counting and arithmetic operation and so on face user''s instruction, and through digital either simulation type input/output control each type machinery or production process. PLC is based on the electronic accounting machine, and is suitable for the industry field work electric controller. It stems from following the electricity control device, but it does not look like following the electricity installs such, realizes the control through electric circuit''s physical process, but mainly saves depending on the movement in the PLC memory the procedure, carries on into the information conversion to realize the control. Enters the information conversion, the reliable physics to realize, may say that is PLC realizes the control two essential points. Enters the information conversion to save depending on the movement in the PLC memory the procedure realizes. The PLC procedure both has the Manufacturer system program (not to be possible change), and has the application which the user develops voluntarily (user) the procedure. The system program provides the movement platform, simultaneously, but is also the PLC procedure reliability service and the signal and the information transformation carries on essential public processing. The user program according to controls the request design by the user. What control request, should have what user program.
Key words: programmable logic controller (PLC); industrial washing machine; Control
目 录
摘要 .....................................................................3
第一章 PLC控制系统设计 .....................................................4
1.1 PLC控制系统设计的基本原则 ..............................................4
1.2 PLC I/O模块的选择步骤与原则 .............................................5
第二章 全自动洗衣机PLC控制分析 ...............................................9
2.1 任务介绍.................................................................9
2.2 控制要求 ...............................................................10
2.3 设计功能顺序图..........................................................11
2.4 硬件接线图 .............................................................12
2.5 I/O口及定时器/计数器说明................................................14
第三章 全自动洗衣机PLC控制程序...............................................16
3.1 梯形图................................................................16
3.2 指令表................................................................21
第四章 仿真及操作说明 .....................................................24
第五章 心得体会.............................................................31
致谢 ........................................................................32
参考文献 ..................................................................33
附录:总接线图................................................................34
