103T-AWD2-RB25C-E1C-KY-SP現(xiàn)貨
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1. 制定設(shè)備運(yùn)行方案
制定方案就是根據(jù)生產(chǎn)工藝的要求,分析各輸入、輸出與各種操作之間的邏輯關(guān)系,確定需要檢測的量和控制的方法,并設(shè)計(jì)出系統(tǒng)中各設(shè)備的操作內(nèi)容和操作順序。據(jù)此便可畫出流程圖。
2. 畫控制流程圖
對于較復(fù)雜的應(yīng)用系統(tǒng),需要繪制系統(tǒng)控制流程圖,用以清楚地表明動(dòng)作的順序和條件。對于簡單的控制系統(tǒng),可省去這一步。
3. 制定系統(tǒng)的抗干擾措施
根據(jù)現(xiàn)場工作環(huán)境、干擾源的性質(zhì)等因素,綜合制定系統(tǒng)的硬件和軟件抗干擾措施,如硬件上的電源隔離、信號濾波,軟件上的平均值濾波等。
4. 編寫程序
根據(jù)被控對象的輸入輸出信號及所選定的PLC型號分配PLC的硬件資源,為梯形圖的各種繼電器或接點(diǎn)進(jìn)行編號,再按照軟件規(guī)格說明書(技術(shù)要求、編制依據(jù)、測試),用梯形圖進(jìn)行編程。
5. 軟件測試
剛編寫好的程序難免有缺陷或錯(cuò)誤。為了及時(shí)發(fā)現(xiàn)和消除程序中的錯(cuò)誤和缺陷,需要對程序進(jìn)行離線測試。經(jīng)調(diào)試、排錯(cuò)、修改及模擬運(yùn)行后,才能正式投入運(yùn)行。
6. 編制程序使用說明書
當(dāng)一項(xiàng)軟件工程完成后,為了便于用戶和現(xiàn)場調(diào)試人員的使用,應(yīng)對所編制的程序進(jìn)行說明,說明書應(yīng)包括程序設(shè)計(jì)的依據(jù)、結(jié)構(gòu)、功能、流程圖,各項(xiàng)功能單元的分析,PLC的IO信號,軟件程序操作使用的步驟、注意事項(xiàng)等。
PLC應(yīng)用系統(tǒng)設(shè)計(jì)實(shí)例
機(jī)械手控制系統(tǒng)設(shè)計(jì)
1. 工藝過程及控制要求
1) 工藝過程
圖6.1所示為一簡易物料搬運(yùn)機(jī)械手的工藝流程圖。該機(jī)械手是一個(gè)水平垂直位移的機(jī)械設(shè)備,其操作是將工件從左工作臺(tái)搬運(yùn)到右工作臺(tái),由光耦合器VLC來檢測工作臺(tái)上有沒有工件。機(jī)械手通常位于原點(diǎn),它的動(dòng)作全部由氣缸驅(qū)動(dòng),而氣缸則由相應(yīng)的電磁閥控制。其中,上升下降和左移右移分別由雙線圈二位電磁閥控制,放松夾緊由一個(gè)單線圈二位電磁閥(稱為夾緊電磁閥)控制。
2) 控制要求
機(jī)械手整個(gè)搬運(yùn)過程要求都能自動(dòng)控制。在啟動(dòng)過程中能切換到手動(dòng)控制及自動(dòng)控制或半自動(dòng)控制(又稱單周期控制),以便對設(shè)備進(jìn)行調(diào)整和檢修。圖6.2是機(jī)械手控制系統(tǒng)的邏輯流程圖。系統(tǒng)啟動(dòng)之前,機(jī)械手處于原始位置,條件是機(jī)械手在高位﹑左位。
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103T-AWD2-RB25C-E1C-KY-SP
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103T-AWD2-RB25C-E1C-KY-SP
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103T-AWD2-RB25C-E1C-KY-SP
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