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豆腐
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樓主  發(fā)表于: 2008-03-20 23:43
              請問(wèn),,各位前輩
怎么用一個(gè)普通的按鈕,  和普通的接觸器 繼電器實(shí)現啟停 (按一下是啟,再按就是停)電機
sjm213
有小知識，無(wú)大學(xué)問(wèn)。
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1樓  發(fā)表于: 2008-03-20 23:57
1.單按鈕起停，在PLC編程里一般用上升沿輸入實(shí)現；
2.普通的繼電器有多普通？只用中間繼電器應該是不行的；
3.用時(shí)間繼電器接線(xiàn)可以實(shí)現，要注意按鈕按下的時(shí)間長(cháng)短；
4.用計數器可以實(shí)現，要注意將其復位為0。
5.自鎖按鈕算不算“普通”呢？
[ 此貼被sjm213在2008-03-21 07:59重新編輯 ]

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