AKD-P02406-NBEC-0000現貨

福州聚福興好價格超乎想象 ，石福州聚福興好品質
備貨充足，停產優勢、各種型號備件,應有盡有產品以其質量高、價格低、服務優贏得了廣大用戶的信賴和好評。歡迎新

老客戶前來洽談合作，您的滿意就是我們的追求。
只要您給出合理價格我賣給你，只要您給出同行的 價格我賣給你，只要您誠心購買給錢我就賣給你。 如果您發現其他

供應商為相同產品提供更為低廉的價格，我們也愿意參照其價格向您提供進一步的折扣，請聯系我們！
在全上百個PLC制造廠中，有幾家舉足輕重的公司。它們是美國Rockwell自動化公司所屬的A．B(Allen ＆ Bradly)公

司、GE-Fanuc公司，德國的西門子(Siemens)公司和法國的施耐德(Schneider)自動化公司，日本的三菱公司和歐姆龍

(OMRON)公司。這幾家公司控制著全80%以上的PLC市場，它們的系列產品有其技術廣度和深度，從微型PLC到有上萬個

I／O(輸入，輸出)點的大型PLC應有盡有

1. 制定設備運行方案
制定方案就是根據生產工藝的要求，分析各輸入、輸出與各種操作之間的邏輯關系，確定需要檢測的量和控制的方法，并設計出系統中各設備的操作內容和操作順序。據此便可畫出流程圖。
2. 畫控制流程圖
對于較復雜的應用系統，需要繪制系統控制流程圖，用以清楚地表明動作的順序和條件。對于簡單的控制系統，可省去這一步。
3. 制定系統的抗干擾措施
根據現場工作環境、干擾源的性質等因素，綜合制定系統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進行編號，再按照軟件規格說明書(技術要求、編制依據、測試)，用梯形圖進行編程。
5. 軟件測試
剛編寫好的程序難免有缺陷或錯誤。為了及時發現和消除程序中的錯誤和缺陷，需要對程序進行離線測試。經調試、排錯、修改及模擬運行后，才能正式投入運行。
6. 編制程序使用說明書
當一項軟件工程完成后，為了便于用戶和現場調試人員的使用，應對所編制的程序進行說明，說明書應包括程序設計的依據、結構、功能、流程圖，各項功能單元的分析，PLC的IO信號，軟件程序操作使用的步驟、注意事項等。
PLC應用系統設計實例
機械手控制系統設計
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機械手的工藝流程圖。該機械手是一個水平垂直位移的機械設備，其操作是將工件從左工作臺搬運到右工作臺，由光耦合器VLC來檢測工作臺上有沒有工件。機械手通常位于原點，它的動作全部由氣缸驅動，而氣缸則由相應的電磁閥控制。其中，上升下降和左移右移分別由雙線圈二位電磁閥控制，放松夾緊由一個單線圈二位電磁閥(稱為夾緊電磁閥)控制。
2) 控制要求
機械手整個搬運過程要求都能自動控制。在啟動過程中能切換到手動控制及自動控制或半自動控制(又稱單周期控制)，以便對設備進行調整和檢修。圖6.2是機械手控制系統的邏輯流程圖。系統啟動之前，機械手處于原始位置，條件是機械手在高位﹑左位。

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AKD-P02406-NBEC-0000

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