1761-NET-DNI
    發(fā)布者:fzjfx0001  發(fā)布時(shí)間:2019-08-14 14:26:53  訪問(wèn)次數(shù):325

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    1761-NET-DNI


     自動(dòng)計(jì)量灌裝機(jī)分清洗和灌裝兩種工作模式。清洗模式下,點(diǎn)啟動(dòng)按鈕后系統(tǒng)經(jīng)過(guò)定位、備壓然后注酒,只是此時(shí)系統(tǒng)不會(huì)測(cè)量灌裝的酒量,直到人為點(diǎn)擊停止按鈕。灌裝模式下有兩種模式可選:定容模式和計(jì)量模式。前者根據(jù)啤酒桶的容積進(jìn)行灌裝,當(dāng)滿桶時(shí)通過(guò)導(dǎo)流閥將浮球頂起灌裝結(jié)束;后者通過(guò)流量計(jì)給定的脈沖進(jìn)行計(jì)量計(jì)算,當(dāng)數(shù)值達(dá)到設(shè)定容積以后灌裝結(jié)束。實(shí)現(xiàn)方式如下:
      (1) 流量計(jì)。本系統(tǒng)是雙桶灌裝系統(tǒng),采用了兩個(gè)流量計(jì),流量計(jì)給 PLC 的是單相脈沖信號(hào),106 個(gè)脈沖為 1L,據(jù)此將系統(tǒng)中設(shè)定的灌裝容量轉(zhuǎn)換成容量脈沖數(shù) ( 容量脈沖數(shù) =106× 灌裝容量 ),然后將實(shí)際的灌裝量與設(shè)定的灌裝容量進(jìn)行比較控制注酒閥的開(kāi)閉;
      (2) 高速計(jì)數(shù)器。S7-200 SMART 集成了 4 路高速計(jì)數(shù)器,在本系統(tǒng)中只使用了 HSC0 與 HSC1 兩個(gè)高速計(jì)數(shù)器,占用 I0.0 和 I0.1 兩個(gè)輸入點(diǎn)。由于是單相計(jì)數(shù),選擇工作模式 0 即可。Micro/WIN SMART 集成了 HSC 向?qū)В谙驅(qū)е兄苯舆x擇 HSC0、HSC1。由于系統(tǒng)默認(rèn)模式 0,直接點(diǎn)擊生成按鈕,便生成兩個(gè)高速計(jì)數(shù)程序 (HSC0_INT 與 HSC1_INT);
      (3) 高速計(jì)數(shù)編程。主程序中僅需用 SM0.1 或沿觸發(fā)調(diào)用生成的子程序一次即可,然后可以在 HC0 和 HC1 讀出當(dāng)前的脈沖數(shù),然后在程序中比較計(jì)算。至于內(nèi)部復(fù)位高速計(jì)數(shù)器,只需用沿觸發(fā)調(diào)用生成的子程序一次,程序圖如圖 2 所示:
     5.2 HMI 畫(huà)面設(shè)計(jì)
      (1) 參數(shù)畫(huà)面如圖 3 所示:可設(shè)定定位時(shí)間、備壓時(shí)間、灌裝容量、灌裝系數(shù)及選擇清洗及灌裝模式,可實(shí)現(xiàn)灌裝的數(shù)量及灌裝的總?cè)莘e,并且用戶可在非工作狀態(tài)及開(kāi)鎖的情況下清除;
     (2) 灌裝畫(huà)面如圖 4 所示:可顯示當(dāng)前灌裝的工作模式、設(shè)備的工作狀態(tài)及灌裝量,能夠動(dòng)態(tài)顯示定位及當(dāng)前的灌裝量。
     S7-200 SMART 基本指令執(zhí)行時(shí)間達(dá) 0.15μs,CPU 本體集成了以太網(wǎng)口,只需普通的網(wǎng)即可下載和調(diào)試程序,最大限度的降低編程電纜的成本,也非常容易獲取。 SMART LINE 觸摸屏相比第一代有很大的提高,顏色更加豐富,增加了以太網(wǎng)接口,無(wú)論是下載程序還是與 PLC 通訊都比較方便。
      STEP 7-Micro/WIN SMART 軟件相比其它軟件非常的小巧,兼容性非常好,可以打開(kāi) S7-200 的程序。向?qū)Чδ苡辛撕艽蟮母倪M(jìn),相比傳統(tǒng)的向?qū)Р僮鞲屿`活,比如高速計(jì)數(shù)器向?qū)В赏瑫r(shí)對(duì)多個(gè)高速計(jì)數(shù)器進(jìn)行設(shè)置,可在同一頁(yè)面下顯示,能同時(shí)生成多個(gè)計(jì)數(shù)程序。其次軟件的窗口設(shè)計(jì)非常實(shí)用,比如將“變量表”、“符號(hào)表”、“狀態(tài)圖表”、“數(shù)據(jù)塊”、“輸出窗口”、“交叉引用”功能都做成了單獨(dú)的窗口,點(diǎn)擊相應(yīng)的標(biāo)簽便可自由切換。這些窗口可以與程序編輯界面同時(shí)顯示,在編程調(diào)試時(shí)非常實(shí)用。

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    1761-NET-DNI

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