現(xiàn)貨、好價(jià)格 
PLC發(fā)展的初期，沿用了設(shè)計(jì)繼電器電路圖的方法來設(shè)計(jì)梯形圖程序，即在已有的些典型梯形圖的基礎(chǔ)上，根據(jù)被控對象對控制的要求，不斷地修改和完善梯形圖。有時(shí)需要多次反復(fù)地調(diào)試和修改梯形圖，不斷地增加中間編程元件和觸點(diǎn)，*后才能得到一個(gè)較為滿意的結(jié)果。這種方法沒有普遍的規(guī)律可以遵循，設(shè)計(jì)所用的時(shí)間、設(shè)計(jì)的質(zhì)量與編程者的經(jīng)驗(yàn)有很大的關(guān)系，所以有人把這種設(shè)計(jì)方法稱為經(jīng)驗(yàn)設(shè)計(jì)法。它可以用于邏輯關(guān)系較簡單的梯形圖程序設(shè)計(jì)。
用經(jīng)驗(yàn)設(shè)計(jì)法設(shè)計(jì)PLC程序時(shí)大致可以按下面幾步來進(jìn)行：分析控制要求、選擇控制原則；設(shè)計(jì)主令元件和檢測元件，確定輸入輸出設(shè)備；設(shè)計(jì)執(zhí)行元件的控制程序；檢查修改和完善程序。
聯(lián)系人；陳如

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