6FX2001-5QP24產(chǎn)品描述:
廈門卡庫電氣;QQ1093230189期待您的詢價(jià)!?。。。?/span>
為了保證系統(tǒng)的控制精度,跑車帶鋸機(jī)控制系統(tǒng)采用閉環(huán)控制。根據(jù)旋轉(zhuǎn)編碼器反饋回來的脈沖信號(hào)計(jì)算跑車工作臺(tái)的實(shí)際距離。當(dāng)跑車工作臺(tái)到達(dá)設(shè)定距離后,PLC輸出制動(dòng)信號(hào),停止跑車的運(yùn)行,實(shí)現(xiàn)跑車的定位。PLC控制系統(tǒng)共有8個(gè)開關(guān)輸入,包括1個(gè)高速脈沖信號(hào)、1個(gè)接近開關(guān)信號(hào)及啟動(dòng)、停止、進(jìn)車、退車、點(diǎn)動(dòng)等。2個(gè)開關(guān)量輸出為制動(dòng)接觸器和后退繼電器,分別控制跑車的停止、運(yùn)動(dòng)方向。 根據(jù)輸入和輸出的要求,我們選用和利時(shí)公司具有自主知識(shí)產(chǎn)權(quán)的HOLLIAS-LEC G3 小型一體化PLC??紤]到此系統(tǒng)需要一定的備用I/O點(diǎn),CPU模塊選擇自帶14點(diǎn)開關(guān)量輸入,10點(diǎn)開關(guān)量輸出的LM3107。該模塊自帶3路獨(dú)立的告訴脈沖輸入,其繼電器輸出的電流容量最大為2A,可直接控制制動(dòng)接觸器,無需中間繼電器。 根據(jù)跑車工作臺(tái)運(yùn)行過程的要求,PLC將當(dāng)前發(fā)送的脈沖值和觸摸屏的設(shè)定值進(jìn)行比較。如果當(dāng)前值小于設(shè)定值,系統(tǒng)立即輸出制動(dòng)信號(hào),然后等待下一次前進(jìn)信號(hào)的輸入。當(dāng)系統(tǒng)需要鋸路補(bǔ)償時(shí),程序會(huì)根據(jù)用戶選擇的補(bǔ)償量進(jìn)行鋸路補(bǔ)償。 以PLC為控制核心的木工帶鋸機(jī)利用PLC的高速計(jì)數(shù)功能實(shí)現(xiàn)了對(duì)跑車工作臺(tái)的定位控制。PLC控制系統(tǒng)的抗干擾能力強(qiáng),提高了木工帶鋸機(jī)的加工精度?;赑LC的控制系統(tǒng)不僅可以用于木工帶鋸機(jī),還可以廣泛應(yīng)用于家具、門窗和木模等制造行業(yè)。
可編程序控制器;外部輸入;BCD數(shù)碼;數(shù)據(jù)處理;實(shí)時(shí)控制 隨著工業(yè)自動(dòng)化程度的不斷提高,可編程序控制器(PLC)正在走入工礦企業(yè)的每一個(gè)角落,只要有控制要求的場(chǎng)合,就有PLC的應(yīng)用。PLC常被稱為全能“工業(yè)電腦”,用它可以方便地對(duì)工業(yè)現(xiàn)場(chǎng)進(jìn)行實(shí)時(shí)控制。在工業(yè)電氣控制系統(tǒng)中,經(jīng)常遇到控制常數(shù)設(shè)定和修改的問題,例如:某加熱控制系統(tǒng)加熱時(shí)間常數(shù)的設(shè)定和改變問題。PLC改變控制常數(shù)的常用方法有兩種,其一,通過上位計(jì)算機(jī)對(duì)原程序中控制數(shù)據(jù)進(jìn)行修改;其二,利用外部裝置輸入數(shù)據(jù),控制系統(tǒng)運(yùn)行。即由外設(shè)將數(shù)據(jù)送入PLC,進(jìn)行數(shù)據(jù)處理,然后對(duì)PLC內(nèi)部參數(shù)進(jìn)行修改,實(shí)現(xiàn)對(duì)工業(yè)設(shè)備的實(shí)時(shí)控制。第二鐘數(shù)據(jù)輸入方法,具有不修改原程序,數(shù)據(jù)輸入方法簡(jiǎn)單、操作方便,能實(shí)現(xiàn)實(shí)時(shí)控制等優(yōu)點(diǎn),不僅適用于計(jì)算機(jī)設(shè)計(jì)人員使用,而且還適用于普通操作人員。在電氣控制設(shè)備上,有著非常廣泛的應(yīng)用,并且許多廠家PLC產(chǎn)品都具有外部數(shù)據(jù)輸入功能。所以,利用PLC控制技術(shù)對(duì)外部BCD碼數(shù)據(jù)進(jìn)行輸入,充分發(fā)揮工業(yè)控制計(jì)算機(jī)—PLC數(shù)值計(jì)算和處理能力的編程、控制方法,具有實(shí)際應(yīng)用的推廣意義。這里,以SIEMENS公司PLC構(gòu)成的某加熱系統(tǒng)為例,詳細(xì)、具體地對(duì)加熱時(shí)間常數(shù)外部數(shù)據(jù)輸入方法及用戶處理程序作以介紹。
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