IC200UDD064,IC200UDD064,kIC200UDD064
AB PLC控制啟停程序控制
主控位定義：
啟動(dòng)請(qǐng)求(START_REQ)：在操作員按下必需的周期啟動(dòng)按鈕(PB_START)后這個(gè)位閉合，在運(yùn)行位(RUNNING)閉合后，這個(gè)位打開。
典型梯形圖：
運(yùn)行(RUNNING)：在啟動(dòng)請(qǐng)求發(fā)生之后，這個(gè)位閉合，通常在輸送系統(tǒng)中最后一個(gè)電機(jī)啟動(dòng)以后。如果你沒有輸送電機(jī)這個(gè)梯級(jí)會(huì)直接閉合。如果你有輸送電機(jī)或者在系統(tǒng)進(jìn)入自動(dòng)循環(huán)運(yùn)行之前你可能要對(duì)其它的一些過程做預(yù)啟動(dòng)，那么插入最后一個(gè)電機(jī)的觸點(diǎn)或預(yù)啟動(dòng)的條件在START_REQ和MCR指令之間，那么必須最后一臺(tái)電機(jī)啟動(dòng)或預(yù)啟動(dòng)條件滿足以后，運(yùn)行位(RUNNING)才會(huì)閉合。這個(gè)運(yùn)行位用在每一個(gè)順序中來允許順序啟動(dòng)。
下面是沒有輸送電機(jī)的典型梯形圖：
下面是有輸送電機(jī)的典型梯形圖：
停機(jī)請(qǐng)求(STOP_REG)：當(dāng)周期停止按鈕被按下，或者有人將機(jī)器從自動(dòng)模式切換到手動(dòng)模式時(shí)，停機(jī)請(qǐng)求位閉合。這個(gè)位也用在每一個(gè)梯級(jí)中，當(dāng)停止請(qǐng)求發(fā)出后禁止設(shè)備再次啟動(dòng)，當(dāng)停止位(STOPPED)閉合后，這個(gè)梯級(jí)被釋放。
典型梯形圖：
停機(jī)(STOPPED)：當(dāng)同意停機(jī)位(OK_TO_STOP)被觸發(fā)后這個(gè)位閉合，這個(gè)梯級(jí)觸發(fā)后，上面的運(yùn)行位被停止。
典型梯形圖：
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