裝卸料小車多方式運行的PLC控制系統(tǒng)設(shè)計

【摘要】

早期運料小車電氣控制系統(tǒng)多為繼電器—接觸器組成的復(fù)雜系統(tǒng)，這種系統(tǒng)存在設(shè)計周期長、體積大、成本高等缺陷，無數(shù)據(jù)處理和通信功能，必須有專人負(fù)責(zé)操作，將PLC應(yīng)用到運料小車電氣控制系統(tǒng)，可實現(xiàn)運料小車的自動化控制，降低系統(tǒng)的運行費用，PLC運料小車電氣控制系統(tǒng)具有連線簡單，控制速度快，可靠性和可維護性好，易于安裝、維修和改造等優(yōu)點。隨著經(jīng)濟的發(fā)展，運料小車不斷擴大到各個領(lǐng)域，從手動到自動，逐漸形成了機械化、自動化。  

將PLC應(yīng)用到運料小車電氣控制系統(tǒng)，可實現(xiàn)運料小車的自動化控制，降低系統(tǒng)的運行費用。通信和數(shù)據(jù)連接功能選項使得PLC在體積、通信和特殊功能模塊等重要的應(yīng)用方面非常完美。本課題主要包括：分析被控對象和明確系統(tǒng)控制要求、PLC選型、確定系統(tǒng)的I/O設(shè)備的數(shù)量及種類、控制流程設(shè)計、控制程序設(shè)計。 

PLC在運料小車控制系統(tǒng)中的應(yīng)用，已經(jīng)在國內(nèi)外工程、工廠中得到實際應(yīng)用，具有巨大的經(jīng)濟和社會價值，其智能化和自動化的思路值得以后繼續(xù)深入研究和推廣。

    關(guān)鍵詞： PLC 運料小車 控制系統(tǒng) I/O點

Early electric car control system of the transporter over the relay - contactor complex system composed of The system design cycle,there is a long,bulky,high cost,defects,no data processing and communications functions,must be hand operated,will be applied to transport materials car PLC electrical control system and can realize automatic control operation of the car,reducing the running costs of the system,PLC control system for electric car transporter with a simple connection to control speed,reliability and maintainability is good,easy to install,repair and improvement and so on.With economic development,transport materials to various areas of growing car,from manual to automatic,and gradually formed the mechanization and automation.

 PLC applied to transport materials to car electrical control system and can realize automatic control operation of the car and reduce system operating costs.Communications and data connectivity options make PLC in volume,communications and special function modules such important applications perfectly. The topics include:analysis of plant and a clear system control requirements;PLC selection;determine the system's I / O device number and type;control process design;control programming.

 PLC control system in the car transporter in the application,has been in domestic and international projects has been applied in the factory,with huge economic and social value,the intelligence and automation beyond the idea worthy of further research and extension. 

 Key words： PLC transporter cart control system I/O points

目 錄

1控制系統(tǒng)介紹 1

1.1控制系統(tǒng)在運輸小車中的作用與地位 1

1.2控制系統(tǒng)介紹 1

2運輸小車系統(tǒng)方案的選擇 3

2.1可編程控制器 PLC的優(yōu)點 3

2.2小車運輸系統(tǒng)方案的選擇 4

3運料小車控制系統(tǒng)的方案論證 5

3.1運料小車控制系統(tǒng)的控制內(nèi)容與要求 5

3.1.1運料小車的運動流程 5

3.1.2設(shè)備控制要求 6

3.2方案論證 6

4硬件的選擇和程序設(shè)計 7

4.1系統(tǒng)硬件設(shè)計 7

4.1.1 PLC的選型 7

4.1.2 S7-200 CPU 226簡介 7

4.2系統(tǒng)變量定義及分配表 7

4.3系統(tǒng)接線圖設(shè)計 8

4.4控制系統(tǒng)程序設(shè)計 9

4.4.1系統(tǒng)的起?？刂?span id="x7pbxmke4" class="Apple-tab-span" style="white-space:pre;"> 9

4.4.2系統(tǒng)的呼車控制 10

4.4.3系統(tǒng)的呼車反轉(zhuǎn)控制 12

4.4.4系統(tǒng)的呼車正轉(zhuǎn)控制 15

5系統(tǒng)調(diào)試及結(jié)果分析 19

5.1系統(tǒng)調(diào)試及解決的問題 19

5.2結(jié)果分析 19

5.3小車的優(yōu)缺點分析 19

5.4設(shè)計的改進及推廣 20

結(jié)束語 21

謝 辭 22

文 獻 23