主營:ABB、西門子6SN/6FC、施耐德140/TSX、AB、安川、力士樂、發(fā)那科、霍尼韋爾、SEW等全球知名品牌DCS系統(tǒng)卡件、模塊、伺服板卡備件——廖工
人機界面可以采用文本顯示器或觸摸屏,可以顯示和設(shè)定目前的工作狀態(tài)、剪板數(shù)量、加工長度、送料速度、剪板頻率等等參數(shù); 變頻器接受PLC的控制,控制電機的啟動、停止、轉(zhuǎn)速等; 光電傳感器的作用是檢測后擋料的長度,通過改變光電傳感器的位置可以調(diào)節(jié)加工長度; 正航A5系列PLC(以下簡稱A5)是整個自動控制系統(tǒng)的核心,由它來根據(jù)操作人員通過人機界面設(shè)定的參數(shù)控制整個系統(tǒng)的動作。 系統(tǒng)的工作流程如下: 系統(tǒng)上電啟動,操作人員通過人機界面設(shè)定剪板數(shù)量、加工長度、送料速度、剪板頻率等等參數(shù),參數(shù)可以斷電保持。正常剪切開始后,A5控制變頻器啟動電機,傳動板材,當板材到達光電傳感器的位置時,光電傳感器將信號反饋至A5,A5控制變頻器停車,控制切刀動作進行剪板,完成一塊料的加工,然后A5再控制變頻器啟動,進行下一塊料的加工。加工過程中,A5可以完成對加工數(shù)量、剪板頻率、送料速度等的統(tǒng)計,并可以在人機界面上實時顯示。 在此控制過程中,A5通過光電傳感器檢測材料長度,然后控制變頻器停車來控制加工長度。由于變頻器控制異步電機停車有一個滯后量,會造成一定的偏差,在設(shè)定光電傳感器的位置時,需要將這個偏差考慮進去并加以調(diào)整
軟件的功能和實現(xiàn) 5.1 Modicon984 PLC程序功能設(shè)計 (1) 編寫簡單的程序,以實現(xiàn)Quantum PLC和Modicon984 PLC可以同時控制Modicon984 PLC的開出點. (2) 把開關(guān)量、模擬量進行處理,送到指定的寄存器,以便通過Peer Cop方式一齊傳輸?shù)絈uantum PLC; (3) 簡單的輔機流程和自啟動流程 由于原配置Modicon984CPU不支持Concept編程,所以仍需用MODSOFT組態(tài)軟件來編寫。 5.2 Quantum PLC程序功能設(shè)計 (1) 發(fā)電機組的開停機流程、功率自動調(diào)節(jié)流程等; (2) 對所有采集到數(shù)據(jù)進行處理分析; (3) 接受上位機和觸摸屏所發(fā)的控制命令并解釋執(zhí)行。 編程軟件采用了組態(tài)軟件Concept2.6,該軟件支持梯形圖(LD)、功能塊圖(FBD)、結(jié)構(gòu)化文本(ST)等多PLC編程語言,能保證系統(tǒng)的各類控制功能的需求。
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