D-410-25
2711-K10C1L1
PK702HLL05
6DR2-001-1A
901J-2572
1968年，通用公司需要開(kāi)發(fā)一種能夠替代硬接線繼電器的設(shè)備，于是PLC就應(yīng)運(yùn)而生。自誕生以來(lái)，PLC一直使用梯形圖邏輯進(jìn)行編程。PLC可以輕松的控制使用數(shù)字和模擬量設(shè)備的過(guò)程，但是如果要去控制那些更復(fù)雜的、本質(zhì)上是順序控制的過(guò)程，使用PLC比使用BASIC、C或C#語(yǔ)言實(shí)現(xiàn)要困難的多。經(jīng)過(guò)多年的演化，PLC已經(jīng)可以使用BASIC或C語(yǔ)言進(jìn)行編程，但是在大多數(shù)情況下，仍然依賴于梯形圖（是IEC61131-3規(guī)定的編程語(yǔ)言的一種）。
很多低端PLC通過(guò)步進(jìn)或直接輸出來(lái)支持運(yùn)動(dòng)控制。利用價(jià)格更高的專用模塊，則可以實(shí)現(xiàn)某些更的運(yùn)動(dòng)控制，但是必須將這些模塊增加到基本系統(tǒng)中去。即使這樣，大多數(shù)設(shè)備仍然使用梯形圖邏輯進(jìn)行編程，這需要對(duì)編程環(huán)境具有較深入的了解，而編程環(huán)境則隨著生產(chǎn)廠家的不同而有所不同，更的功能通常由專用的功能塊來(lái)實(shí)現(xiàn)。
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聯(lián)系人：李濤（銷售一部經(jīng)理）
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手機(jī)：13696852881
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①降低您的維護(hù)成本！
②延長(zhǎng)控制系統(tǒng)壽命！
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