描述

1C31181G01

在功能指令的學習中應(yīng)特別關(guān)注一下PID、CJ、CALL等一些較難理解而又應(yīng)用廣泛指令的學習和掌握。針對這些指令在學習理論知識的同時，還要結(jié)合一些成熟的程序范例加以深度的理解和揣摩，在此基礎(chǔ)上可以針對一些小型的生產(chǎn)任務(wù)加以編程練習，以練促學，邊學邊練。只有不斷地在PLC上運行這些指令，觀察運行的結(jié)果，才能弄清PLC指令的作用。很多初學者對PLC一臉的迷茫，往往是出于一種畏懼，擔心損壞設(shè)備。而這些畏懼是沒有任何道理的。仔細的閱讀手冊是非常重要的，但是僅靠讀書是成不了一個工程師的。更何況手冊上的內(nèi)容并非面面俱到。我在接觸到那些不熟悉的指令時，喜歡單獨編一個小程序，讓PLC運行。然后逐個修改條件，觀察運行的結(jié)果（MicroWin為用戶提供了非常好的監(jiān)控手段），反過來再重新理解手冊的描述，這樣就可以非常直觀的理解這些指令的作用和使用方法。

不必擔心自己寫的程序會有什么問題，會影響PLC的正常工作。程序有沒有問題，只有讓PLC運行了才能發(fā)現(xiàn)。而發(fā)現(xiàn)問題并解決問題就是對自己能力的提高。撇開硬件操作不談，單就軟件來說，我還真沒有遇到過由于軟件問題而損壞PLC的事。在這里不必擔心繼電器電路接錯線可能造成的后果。所以，大膽的實踐是PLC編程的必由之路。

當然，大膽實踐并不是野蠻操作，而是必須遵循必要的規(guī)范。還有一個要注意的，在程序未經(jīng)可靠性證實之前，千萬不要掛接負載，以免造成不必要的損失。數(shù)字量的輸出有LED顯示；而模擬量處理可以采用一些硬件或軟最后，PLC提供了豐富的指令、模塊，比單片機方便了很多。但是初學者編程時應(yīng)盡量先使用簡單的指令達到目的。盡管看上去有點土，卻不失為一個入門的好途徑，且對你理解那些較為復(fù)雜的指令會有幫助。具備了一定經(jīng)驗后，應(yīng)該考慮掌握復(fù)雜指令的應(yīng)用，以及程序的優(yōu)化。

產(chǎn)品承諾：
保?證?全新原裝進口,
保?證?安全準時發(fā)貨，
保?證售后服務(wù)質(zhì)量，
優(yōu)勢價格，大量現(xiàn)貨。

主營DCS系統(tǒng)配件
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1C31181G01

描述

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