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:萍鄉(xiāng)2098-DSD-HV030 AB伺服驅(qū)動(dòng)器 羅克韋爾怎么樣
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:萍鄉(xiāng)2098-DSD-HV030 AB伺服驅(qū)動(dòng)器 羅克韋爾怎么樣上升沿和下降沿觸發(fā)是兩種非常重要的觸發(fā)信號(hào)，也是plc編程中使用非常頻繁的兩種元素，今天就給大家講述一下，如何在CFC語(yǔ)言中實(shí)現(xiàn)上升沿和下降沿觸發(fā)。我曾在前文講述過(guò)，CFC的實(shí)質(zhì)就是可以自由移動(dòng)的FBD，因此CFC和FBD的使用可以說(shuō)是如出一轍，而FBD和LD又有著千絲萬(wàn)縷的聯(lián)系，CFC實(shí)現(xiàn)上升沿和下降沿觸發(fā)就是對(duì)功能塊的調(diào)用。F_TRIG是指下降沿觸發(fā)，其中F是英文FALL的縮寫(xiě)，是指下降的意思。
