描述
自從1968年在通用汽車公司使用開始(用來代替硬連線繼電器),PLC就使用梯形邏輯編程。它們可容易地控制數(shù)字和模擬設(shè)備的過程,但對更復雜、連續(xù)性質(zhì)過程的編程要比用高級編程語言,如BASIC、C或C#更加困難。多年來,PLC已經(jīng)進化到可以用BASIC或C語言編程的水平,但大部分仍然依賴于梯形邏輯。很多低端PLC通過步進和方向輸出支持運動控制。一些更高水平的運動控制可以通過昂貴的專用模塊來實現(xiàn),但必須添加到基本系統(tǒng)。盡管這樣,大多數(shù)設(shè)備用梯形邏輯編程,需要熟悉編程環(huán)境,制造工藝,以及專門的功能塊才能實現(xiàn)需要的功能。一般市場中的運動控制器通常包括插補功能(直線插補或圓弧插補),協(xié)同運動、齒輪、凸輪和事件觸發(fā)動作(使用傳感器和位置鎖存)。在老控制器中,每軸使用專用的輸入和輸出。運動輸入,如使能、超程限位和編碼器輸入(每軸一個或兩個)和類似伺服命令的運動輸出(通常為+/-10V模擬量)和/或步進指令(步進和方向)。多數(shù)控制器還具有一些通用的I/ O。新控制器依靠數(shù)字網(wǎng)絡(luò),如EtherCAT或SERCOS用來傳遞控制信號至驅(qū)動器,接收和發(fā)送直接連接到驅(qū)動器的數(shù)字IO。在處理聯(lián)動的運動時,典型的運動控制器無法與機器人控制器競爭。典型的運動控制器,如果你想把末端執(zhí)行器移動到一個特定點,你必須為每個軸找出正確的位置。你需要對機器人和有機械連接機制的其他機器做的事情是使用反向運動學的方法來編程。使用時需要公式,在物理空間中,需要把特定點轉(zhuǎn)換為各自的位置,描述每個關(guān)節(jié)(或軸)需要移動至所述機械連接機構(gòu)的終點。同樣,這些系統(tǒng)應(yīng)用廣泛多樣,需要熟悉他們的特定編程環(huán)境。機器人控制器已經(jīng)設(shè)計為實現(xiàn)特定復雜機制的最佳控制。多數(shù)控制器為特定設(shè)備。制造商創(chuàng)建一種專門的語言編程,從平臺到平臺的變化很大。當控制設(shè)備使用為他們設(shè)計的控制庫時,非常高效;然而,大多數(shù)都不能很好地進行通信、集成或編程。在過去,幾乎專用的機器人控制器只支持的運動學和反向運動學?,F(xiàn)在,很多常見的運動控制器提供機器人類型命令的某些子集,尤其在針對包裝自動化的控制器。機器人控制器和運動控制器之間的界限正變得模糊,但仍然用不同的系統(tǒng)和不同的語言編程,需要程序員進行協(xié)調(diào),設(shè)計通常用于特定目的。
產(chǎn)品承諾:
保?證?全新原裝進口,
保?證?安全準時發(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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