基于PLC的細紗機電控部分設計

電氣自動化論文編號:ZD181  附任務書,大圖,西門子公司S7－200PLC  論文字數:21010,頁數:47

目  錄

摘要…………………………………………………………………………………………Ⅰ
Abstract……………………………………………………………………………………Ⅱ
第一章    緒 論……………………………………………………………………………1
第二章    細紗工業簡述………………………………………………………………… 3
2.1   細紗工藝簡介………………………………………………………………… 3
2.2   細紗機簡介…………………………………………………………………… 5  
第三章    硬件設計……………………………………………………………………… 7  
3.1   電機的選型…………………………………………………………………… 7               
3.2   PLC選型及外圍電路的設計………………………………………………… 10
3.2.1 PLC的選型…………………………………………………………………… 10
3.2.2 模擬量擴展模塊的選型………………………………………………………12
3.2.3 PLC的電源設計……………………………………………………………… 13
3.3   傳感器的設計…………………………………………………………………14
3.3.1 行程開關的設計………………………………………………………………14
3.3.2 溫度傳感器的設計……………………………………………………………15
3.3.3 濕度傳感器的設計……………………………………………………………16
3.4   低壓電器的選型………………………………………………………………17
3.4.1 接觸器的選型…………………………………………………………………17
3.4.2 繼電器的選型…………………………………………………………………19
3.4.3 主令電器的選擇………………………………………………………………20
第四章    軟件設計………………………………………………………………………21
4.1   細紗生產工藝分析……………………………………………………………21
4.2   系統控制程序…………………………………………………………………24
第五章    控制程序調試…………………………………………………………………27
5.1   STEP 7開發環境介紹…………………………………………………………27
5.2   控制程序的調試………………………………………………………………29
第六章    系統抗干擾分析及注意問題…………………………………………………31
6.1     系統干擾以及抑制措施……………………………………………………31
    6.2     系統應用中需要注意的問題………………………………………………34
結論…………………………………………………………………………………………38
參考文獻……………………………………………………………………………………39
致謝…………………………………………………………………………………………40
附錄:梯形圖…………………………………………………………………………………41

摘  要
                                         
細紗生產是紡紗過程的最后一道工序，細紗機是將粗紗或條子紗紡成一定支數的細紗，供捻線、機織或針織用。細紗機在生產中起著很重要的作用，控制系統性能的穩定直接影響到生產的成本。本設計就是將以前在細紗生產過程中的老式繼電器控制，改成用自動化程度比較高的PLC控制，在此基礎上實現細紗機的低速啟動、高速啟動、中途停車、提前落紗和緊急停車等主控制功能；實現電機嚴格按順序啟動、過載保護和漏電保護等保護功能；實現低速運行狀態指示、高速運行狀態指示、滿紗指示、按故障性質發出停機報警信號等指示、報警功能，最終實現細紗機的穩定、可靠、安全運行。

  關鍵詞：細紗機；PLC；自動控制

The electromechanics of spun yarn based on PLC accuses of designing partly
Abstract

It is end lines of process to spinning course for spun yarn not to produce, spinning frame spin certain spun yarn of number of yarn roving or strip yarn, available for twisting thread , the machine is woven or knitting. The spinning frame plays a very important role in production, the cost that the stability of controlling systematic function influenced production directly. It is to control the outdated relay while the spun yarn produces of before to originally design, make into and control with PLC with higher automatic degree, realize to launch , start , stop , fall yarn and is it control function mainly to stop promptly ahead of time midway at a high speed at a low speed spinning frame on this basis; Realize the electrical machinery is started in order strictly, overload protection and leaking electricity to protect etc. and protect the function; Realize low-speed operation state point out , high-speed operation state point out , full yarn point out , is it shut down alarm signal instruction , warning function to send out according to trouble nature, realize stability of the spinning frame , reliable , safe operation finally.

Keyword: The mechanics of spun yarn; PLC; Automatic control