描述

369-HI-R-M-0-0

PLC可以支持數(shù)控機床的控制和管理，在機械加工行業(yè)，可編程控制器與計算機數(shù)控（CNC）集成在一起，用以完成機床的運動位置控制，它的功能是接受輸入裝置輸入的加工信息，經(jīng)處理與計算，發(fā)出相應(yīng)的脈沖給驅(qū)動裝置，通過步進電機或伺服電機，使機床按預(yù)定的軌道運動，以完成多軸伺服電機的自控。目前以用于控制無心磨削、沖壓、復(fù)雜零件分段沖裁、滾削摸削等應(yīng)用中。PLC可以通過通迅接口與顯示終端和打印機等外設(shè)相連。顯示器作為人機界面（HMI）是一種內(nèi)含微處理芯片的智能化設(shè)備，它與PLC相結(jié)合可取代電控柜上眾多的控制按鈕、選擇開關(guān)、信號指示燈，及生產(chǎn)流程模擬屏和電控柜內(nèi)大量的中間繼電器和端子排。所有操作都可以在顯示屏上的操作元件上進行。PLC可以方便、快捷地對生產(chǎn)過程中的數(shù)據(jù)進行采集、處理，并可對要顯示的參數(shù)以二進制、十進制、十六進制、ASCII字符等方式進行顯示。在顯示畫面上，通過圖標(biāo)的顏色變化反應(yīng)現(xiàn)場設(shè)備的運行狀態(tài)，如閥門的開與關(guān)，電機的啟動與停止，位置開關(guān)的狀態(tài)等。PID回路控制用數(shù)據(jù)、棒圖等綜合方法反映生產(chǎn)過程中量的變化，操作人員通過參數(shù)設(shè)定可進行參數(shù)調(diào)整，通過數(shù)據(jù)查詢可查找任一時刻的數(shù)據(jù)記錄，通過打印可保存相關(guān)的生產(chǎn)數(shù)據(jù)，為今后的生產(chǎn)管理和工藝參數(shù)的分析帶來便利。近幾年來，可編程序控制器(PLC)以其可靠性高、適應(yīng)性強、靈活性好、編程簡單、容易掌握等特性，在各個領(lǐng)域發(fā)揮越來越重要的作用。在PLC控制系統(tǒng)中，PLC作為主要控制設(shè)備，必然與控制對象中各種輸入信號(如按鈕、限位開關(guān)、拔動開關(guān)、繼電器的觸點及其它檢測信號等)和輸出設(shè)備(如繼電器線圈、接觸器線圈、電磁閥等執(zhí)行元件)相關(guān)聯(lián)。在實際工作中，由于受PLC應(yīng)用系統(tǒng)規(guī)模的限制，PLC輸入/輸出點數(shù)往往不夠用。為此若采用擴展輸入/輸出單元或更換點數(shù)更多的PLC來解決有時又不合算，為了降低系統(tǒng)硬件的成本，常常采用各種技巧減少系統(tǒng)占用的輸入/輸出點數(shù)，相當(dāng)于擴展了PLC的I/O點數(shù)。本文從硬件、軟件兩個方面介紹在不增加硬件情況下“擴展”PLCI/O點數(shù)的幾種方法。

產(chǎn)品承諾：
保?證?全新原裝進口,
保?證?安全準(zhǔn)時發(fā)貨，
保?證售后服務(wù)質(zhì)量，
優(yōu)勢價格，大量現(xiàn)貨。

主營DCS系統(tǒng)配件
機器人系統(tǒng)配件
大型伺服系統(tǒng)配件
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