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樓主  發(fā)表于: 2018-04-16 18:30
DOG信號是用什么傳感器呢,感謝大神,還有一般一軸為什么要有四個(gè)接近開(kāi)關(guān),感謝大神
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  • 下載積分:+1(libin520) 好貼好貼!
    michael.guan
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    1樓  發(fā)表于: 2018-04-17 10:05
    DOG其實(shí)就是原點(diǎn)接近信號,多數PLC的DOG信號可以直接忽略,但有些PLC必須要用的,如三菱的QD75,是使用DOG點(diǎn)作為原點(diǎn)接近信號,然后再在程序中設定檢測到DOG后再移動(dòng)多少距離來(lái)作為原點(diǎn)。
    一般的DOG點(diǎn)主要是原點(diǎn)復歸的時(shí)候的減速作用,即當PLC檢測到DOG信號之前,PLC執行高速原點(diǎn)復歸,而當檢測到DOG之后,PLC變更為低速原點(diǎn)復歸方式,直至原點(diǎn)復歸結束。

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