PLC在自動控制中的應(yīng)用







摘 要





隨著現(xiàn)代工藝控制的飛速發(fā)展，PLC已越來越多的應(yīng)用與工業(yè)領(lǐng)域。從其產(chǎn)生到現(xiàn)在，實現(xiàn)了接線邏輯到存儲邏輯的飛躍；其功能從弱到強(qiáng)，實現(xiàn)了邏輯控制到數(shù)字控制的進(jìn)步；其應(yīng)用領(lǐng)域從小到大，實現(xiàn)了單體設(shè)備簡單控制到勝任運動控制、過程控制及集散控制等各種任務(wù)的跨越。



本文對PLC的特殊結(jié)構(gòu)及工作方式作了闡述，采用面向控制過程、面向問題、簡單直觀的PLC編程語言。以交流三速起貨機(jī)電動機(jī)控制為例，介紹PLC在自動控制中的應(yīng)用。





關(guān)鍵字：PLC系統(tǒng)設(shè)計 三相起貨電動機(jī)控制





ABSTRACT





Along with modern technology control develop fast, PLC has been more and more to apply with industrial field. Produce from it for now, have realized wiring logic arrive to stock the leap of logic; Its function from weak arrive strong, have realized logic control to the advance of digital control; Its application field arrives since childhood, have realized monomer equipment simple control to competent sport control, course control and the leap that gathers the various tasks such as scattered control.



This paper is for the special structure of PLC and working way have made to elaborate, adopting faces control course and problem-oriented, simple visual PLC programming language. With 3 alternating quickly winch motor controls to be regular introduce PLC the application in automatic control.





Key Words: PLC system designs  Three-phase unload motor control





目                  錄



緒論…………………………………………………………………………………………… 4



第1章 PLC的基本結(jié)構(gòu)和工作方式…………………………………………………… 5



2.1 PLC的基本結(jié)構(gòu)………………………………………………………………………5



2.2 PLC的工作方式………………………………………………………………………6



第2章 PLC的編程器件和編程方式…………………………………………………… 7



3.1 PLC的編程器件………………………………………………………………………7



3.2 PLC的編程方式………………………………………………………………………7



第3章 F1系列PLC…………………………………………………………………………9



4.1型號說明………………………………………………………………………………9



4.2 PLC控制系統(tǒng)設(shè)計…………………………………………………………………10



4.3 交流三速起貨機(jī)簡介…………………………………………………………… 11



4.4 控制線路在各檔位工作情況……………………………………………………12



4.5 系統(tǒng)中的輔助繼電器和軟件定時器………………………………………… 15



4.6 PLC控制交流三速起貨機(jī)梯形工作過程…………………………………… 16



4.7 交流三速起貨機(jī)電動機(jī)PLC控制指令程序…………………………………17



第4章 結(jié) 論…………………………………………………………………………………20



參考文獻(xiàn)………………………………………………………………………………………20