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賞心悅目
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樓主  發(fā)表于: 2017-07-07 09:43
小弟在做一臺設備,碰到一個(gè)難題,問(wèn)題是這樣的,一條流水線(xiàn)的傳送帶由步進(jìn)馬達帶動(dòng),旁邊有一套CCD鏡頭,鏡頭旁邊有光纖檢測到傳送帶上面的產(chǎn)品就觸發(fā)CCD檢測,流水線(xiàn)不停地運行,每觸發(fā)一次CCD檢測,產(chǎn)品OK,CCD控制器就反饋一個(gè)OK信號給PLC,產(chǎn)品NG的話(huà)就沒(méi)有反饋信號,然后傳送帶再走一定的脈沖量就停下來(lái)報警。PLC用的是三菱的,流水線(xiàn)的速度一分鐘大概要檢測200個(gè)產(chǎn)品這樣。他們有一臺老設備人家是用單片機控制完成這樣的功能了,這用PLC感覺(jué)很難下手,有沒(méi)有前輩來(lái)指點(diǎn)下小弟呀!
joker1874
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1樓  發(fā)表于: 2017-07-07 14:43
你的難點(diǎn)在哪?不知道怎么停還是不知道停在哪?
三菱的步進(jìn)用PLSY就行了,沒(méi)給你OK信號跳到別的NG程序段里去,然后找個(gè)位置停下來(lái)
停的話(huà)你可以定時(shí),也可以走脈沖,這都隨你啊,沒(méi)什么難點(diǎn)吧

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