廈門仲鑫航自動化設(shè)備有限公司
主營產(chǎn)品: PLC模塊,控制器,驅(qū)動器 |
廈門仲鑫航自動化設(shè)備有限公司
主營產(chǎn)品: PLC模塊,控制器,驅(qū)動器 |
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更新時間:2018-05-15 17:51:37瀏覽次數(shù):374
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P0917HD FBM223備件
P0917HD FBM223備件
PLC程序設(shè)計一般分為以下幾個步驟:
1. 程序設(shè)計前的準(zhǔn)備工作
程序設(shè)計前的準(zhǔn)備工作就是要了解控制系統(tǒng)的全部功能、規(guī)模、控制方式、輸入/輸出信號的種類和數(shù)量、是否有特殊功能的接口、與其它設(shè)備的關(guān)系、通信的內(nèi)容與方式等,從而對整個控制系統(tǒng)建立一個整體的概念。接著進一步熟悉被控對象,可把控制對象和控制功能按照響應(yīng)要求、信號用途或控制區(qū)域分類,確定檢測設(shè)備和控制設(shè)備的物理位置,了解每一個檢測信號和控制信號的形式、功能、規(guī)模及之間的關(guān)系。
2. 設(shè)計程序框圖
根據(jù)軟件設(shè)計規(guī)格書的總體要求和控制系統(tǒng)的具體情況,確定應(yīng)用程序的基本結(jié)構(gòu)、按程序設(shè)計標(biāo)準(zhǔn)繪制出程序結(jié)構(gòu)框圖,然后再根據(jù)工藝要求,繪出各功能單元的功能流程圖。
3. 編寫程序
根據(jù)設(shè)計出的框圖逐條地編寫控制程序。編寫過程中要及時給程序加注釋。≠≠≠≠:鄭娟萍 詢價:0 5 9 2 -5 1 7 3 2 7 9
:0 5 9 2- 5 1 6 5 5 6 1 [[[Q:2 7 7 3 7 3 4 0 8 8
郵 箱: 2773734088
順序控制設(shè)計法zui基本的思想是將系統(tǒng)的一個工作周期的劃分為若干個順序相連的階段,這些階段稱為步(Step),可以用編程元件,(例如輔助繼電器M和順序控制繼電器S)來代表各步。步是根據(jù)輸出量的狀態(tài)變化來劃分的,在任何一步之內(nèi),各輸出量的ON/OFF狀態(tài)不變,但是相鄰兩步輸出量總的狀態(tài)是不同的,步的這種劃分方法使代表各步的編程元件的狀態(tài)與各輸出量的狀態(tài)是之間有著極為簡單的邏輯關(guān)系。
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