【正文】 業(yè)設(shè)計（論文）說明書 I 摘 要 目前，輸送帶系統(tǒng)在工業(yè)的各個領(lǐng)域有著廣泛的應(yīng)用。其結(jié)構(gòu)簡單、運(yùn)行平穩(wěn)、運(yùn)轉(zhuǎn)可靠、能耗低、對環(huán)境污染小、便于集中控制和實(shí)現(xiàn)自動化、管理維護(hù)方便，在連續(xù)裝載條件下可實(shí)現(xiàn)連續(xù)運(yùn)輸。而接觸繼電器控制系統(tǒng)接線復(fù)雜、抗干擾能力差，易因接觸不良而造成故障，而且功能擴(kuò)展性差。 根據(jù)所學(xué)知識和文獻(xiàn)資料對基 于 PLC的生產(chǎn)線輸送帶控制系統(tǒng)設(shè)計所采用的方法是PLC 集中控制的辦法，利用 PLC 內(nèi)部存儲來執(zhí)行邏輯運(yùn)算、順序控制、定時、計數(shù)和算術(shù)運(yùn)算等操作，并采用數(shù)字量，模擬量的輸入和輸出來完成控制過程，從而實(shí)現(xiàn)對傳送帶的智能控制。因此本次設(shè)計選擇了用 PLC 來控制輸送帶的整個運(yùn)行過程，利用 PLC 簡單可視化的程序，實(shí)現(xiàn)自動控制的目的。 關(guān)鍵詞 ： PLC； 輸送帶； 集中控制 河南理工大學(xué)畢業(yè)設(shè)計（論文）說明書 II Design Of The Conveyor Belt Control System For Production line Based on PLC Abstract At present, belt conveyor system in the industrial areas in which there is a wide range of applications. Its simple structure, smooth running, run reliable, low energy consumption and environmental pollution on small, easy to focus on control and automation, and ease of maintenance, and management in a continuous load conditions for transport. Conveyor belt for the control, it has a variety of forms of control, it can be done by singlechip Phone, as well as puter, PLC, have in the past to control relay control system with touch. Contact with relay control system wiring plex, antiinterference ability is poor, vulnerable to failure and poor contact, and scalability. PLC due to its high reliability, and functionality has been more and more enterprises, traditional contact relay control system has been replaced by PLC for stepbystep. Based on the knowledgebased information and documentation of PLC conveyor belt production line control system design is the method used by the centralized control PLC approaches, using PLC internal storage to perform logical operations, sequence control, timer, counting and arithmetic operations, such as volume, and adopts the digital, and analog input and output to plete control over the process, the conveyor belt of intelligent control. But PLC to many of the features of the puter and relay control systems into one, so that group mentality and PLC control software, and more closely connected to the analog control, position control, and control their remote munication is much more refined. Therefore this design choice PLC to control the use of the conveyor belt, used during the entire run PLC simple visualization of the process, the automatic control. Use the PLC The circuit makes the system more concise clear and 10 for easy future maintenance of the running belt conveyor. Keywords: PLC。 centralized control 河南理工大學(xué)畢業(yè)設(shè)計（論文）說明書 III 目 錄 1 引言 ....................................................................................................................... 1 設(shè)計目的和意義 ........................................................................................ 1 國內(nèi)外帶式輸送機(jī)技術(shù)現(xiàn)狀及差距 ........................................................ 2 大型帶式輸送機(jī)的關(guān)鍵核心技術(shù)上的差距 ................................. 3 技術(shù)性能上差距 ............................................................................. 4 控制系統(tǒng)上差距 ............................................................................. 5 本文所做的工作 ........................................................................................ 5 2 基于 PLC 的生產(chǎn)線輸送帶控制系統(tǒng)方案設(shè)計 .................................................. 6 膠帶運(yùn)輸機(jī) ................................................................................................ 6 膠帶運(yùn)輸機(jī)的類型及適用條件 ..................................................... 6 膠帶運(yùn)輸機(jī)結(jié)構(gòu) ............................................................................. 6 方案比較 .................................................................................................... 7 方案確定 .................................................................................................... 8 設(shè)計任務(wù) ......................................................................................... 9 系統(tǒng)設(shè)計思路 ............................................................................... 10 3 基于 PLC 的生產(chǎn)線輸送帶控制系統(tǒng)硬件設(shè)計及選型 .................................... 12 可編程控制器 PLC 的選型 ..................................................................... 12 PLC 的組成結(jié)構(gòu) ............................................................................ 12 PLC 的工作原理 ............................................................................ 13 機(jī)型 的選擇 .................................................................................. 16 Siemens S7200 介紹 .................................................................... 17 本設(shè)計的 PLC 配置 ...................................................................... 18 本設(shè)計 PLC 的 I/O 配置及外圍電路設(shè)計 .................................. 20 傳感器選型 .............................................................................................. 22 光電傳感器 .................................................................................... 22 稱重傳感器 .................................................................................... 22 跑偏開關(guān) ........................................................................................ 24 被控裝置的選擇 ...................................................................................... 26 傳送帶電機(jī) .................................................................................... 26 電動推桿 ........................................................................................ 27 液壓推桿 ....................................................................................... 29 滾筒電機(jī) ........................................................................................ 30 4 基于 PLC 生產(chǎn)線輸送帶控制系統(tǒng)軟件設(shè) 計 .................................................... 31 PLC 程序設(shè)計 ........................................................................................... 31 編程軟件介紹 (STEP7 Micro/WIN) .............................................. 31 軟件編程分析及編程 .................................................................... 32 PLC 編程 ....................................................................