6SE7023-4EP50 A5E00072837-08
系統(tǒng)組成
PLC選用日本松下FP0 PLC，共8點(diǎn)輸入(X0~X7),8點(diǎn)輸出(Y0~Y7)，主要控制主電機(jī)Motor1和毛斗步進(jìn)電機(jī)Motor2的工作狀態(tài)和轉(zhuǎn)速;步進(jìn)電機(jī)選用兩相混合步進(jìn)電動(dòng)機(jī)，步距角1.8°/STEP，用于驅(qū)動(dòng)主機(jī)和毛斗;步進(jìn)電機(jī)驅(qū)動(dòng)器選用DMD402，電源電壓DC14V~40V，其作用是根據(jù)PLC的控制指令對電機(jī)實(shí)現(xiàn)脈沖和方向控制。
3.2 系統(tǒng)工作原理
FP0系列PLC除具有一般邏輯控制與運(yùn)算功能外，還具有高速計(jì)數(shù)輸入(最大10kHz)、PLS脈沖直接輸出、SPD位置控制、PWM脈沖輸出等特殊處理功能，用于步進(jìn)電機(jī)的速度控制或位置按制十分方便。
在圖3所示系統(tǒng)中:PLC輸出口Y0、Y1以脈沖速率方式輸入步進(jìn)電機(jī)驅(qū)動(dòng)器的Pulse b端，控制梳理機(jī)主電機(jī)和毛斗電機(jī)轉(zhuǎn)速和位移。PLC輸出口Y2、Y3以方向信號(hào)輸入到驅(qū)動(dòng)器Directional b端，控制梳理機(jī)電機(jī)的轉(zhuǎn)向。輸出點(diǎn)Y4、Y5是步進(jìn)電機(jī)復(fù)位信號(hào)RST，每次開機(jī)對步進(jìn)電機(jī)驅(qū)動(dòng)器清零。PLC輸入點(diǎn)X0以梳理機(jī)喂入量斗處的紅外傳感器作為輸入信號(hào)，可調(diào)節(jié)喂入量斗的喂毛量。X1、X2作為步進(jìn)電機(jī)的啟動(dòng)信號(hào)，X3作為步進(jìn)電機(jī)復(fù)位信號(hào)。X4以為位置傳感器作為輸入信號(hào)，檢測梳理機(jī)是否復(fù)位?？梢岳卯?dāng)需要手動(dòng)操作時(shí)，可通過PLC的手動(dòng)輸入信號(hào)X5、X6，以點(diǎn)動(dòng)方式按制電機(jī)的正轉(zhuǎn)或反轉(zhuǎn)。控制關(guān)系為:X5=ON，電機(jī)正轉(zhuǎn);X6=ON，電機(jī)反轉(zhuǎn)。
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