描述
CR-GEN0-M6400R3
在梯形圖中,將Y0和Y1的常閉觸點分別與對方的線圈串聯,可以保證它們不會同時為ON,因此KM1和KM2的線圈不會同時通電,這種安全措施在繼電器電路中稱為“互鎖”。除此之外,為了方便操作和保證Y0和Y1不會同時為ON,在梯形圖中還設置了“按鈕聯鎖”,即將反轉起動按鈕X1的常閉觸點與控制正轉的Y0的線圈串聯,將正轉起動按鈕X0的常閉觸點與控制反轉的Y1的線圈串聯。設Y0為ON,電動機正轉,這時如果想改為反轉運行,可以不按停止按鈕SB1,直接按反轉起動按鈕SB3,X1變?yōu)镺N,它的常閉觸點斷開,使Y0線圈“失電”,同時X1的常開觸點接通,使Y1的線圈“得電”,電機由正轉變?yōu)榉崔D。
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