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廈門泰尼電氣有限公司
主營產(chǎn)品: AB模塊PLC |
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廈門泰尼電氣有限公司
主營產(chǎn)品: AB模塊PLC |
參考價(jià) | 面議 |
聯(lián)系方式:張亮查看聯(lián)系方式
更新時(shí)間:2018-03-26 20:28:38瀏覽次數(shù):135
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IC693MDL654+-+-+-IC693MDL654
IC693MDL654+-+-+-IC693MDL654
當(dāng)Y0接通時(shí),如果Q1閉合,則電流從X0端流出,經(jīng)過VD1→Q1→Y0端,再經(jīng)過Y0的觸點(diǎn),從輸出公共端COM流出,zui后流回輸入COM端,從而使輸入繼電器X0接通。在梯形圖程序中應(yīng)該用Y0的常開觸點(diǎn)和X0的常開觸點(diǎn)的串聯(lián)來表示Q1提供的輸入信號(hào)。圖2中的二極管也是起切斷寄生回路的作用。
采用矩陣輸入方法除了要按圖2所示方法進(jìn)行硬件連接外,還必須編寫對(duì)應(yīng)的PLC程序。(http://www.diangon。。com版權(quán)所有)由于矩陣輸入的信號(hào)是分時(shí)被讀入PLC的,所以讀入的輸入信號(hào)為一系列斷續(xù)的脈沖信號(hào),在使用時(shí)應(yīng)注意這個(gè)問題。另外,應(yīng)保證輸入信號(hào)的寬度大于Y0、Y1、Y2輪流導(dǎo)通一遍的時(shí)間,否則可能會(huì)丟失輸入信號(hào)。
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