描述

MVME162-10

dcs為分散控制系統(tǒng)的英文（TOTALDISTRIBUTEDCONTROLSYSTEM）簡稱。指的是控制危險分散、管理和顯示集中。60年代末有人研制了作邏輯運算的可編程序控制器（ProgrammableLogicController）。簡稱PLC。主要應用于汽車制造業(yè)。70年代中期以完成模擬量控制的DCS推向市場，代替以PID運算為主的模擬儀表控制。首先提出DCS這樣一種思想的是原制造儀表的廠商，當時主要應用于化工行業(yè)。后又有計算機行業(yè)從事DCS的開發(fā)。70年代微機技術還不成熟，計算機技術還不夠發(fā)達。操作站、控制器、I/O板和網絡接口板等都是DCS生產廠家自行開發(fā)的，也就是所有部件都是專用的。
70年代初，有人用如PDP/1124這樣的小型機代替原來的集中安裝的模擬儀表控制。連接到中央控制室的電纜很多。如用小型機既作為控制器、同時把連接小型機的CRT又作為顯示設備（即人機界面）。一臺小型機需接收幾千臺變送器或別的傳感器來的信號，完成幾百個回路的運算。很顯然其危險有點集中。和模擬儀表連接的電纜一樣多，并且一旦小型機壞了，控制和顯示都沒有了。數(shù)字控制沒有達到預期的目的。?后有人提出把控制和顯示分開。一臺計算機完成控制計算任務，另一臺計算機完成顯示任務。另外，一個工藝過程作為被控對象可能需要顯示和控制的點很多，其中有一些還需要閉環(huán)控制或邏輯運算，工藝過程作為被控對象的各個部分會有相對獨立性，可以分成若干個獨立的工序，再把在計算機控制系統(tǒng)中獨立的工序上需要顯示和控制的輸入、輸出的點分配到數(shù)臺計算機中去，把原來由一臺小型機完成的運算任務由幾臺或幾十臺計算機（控制器）去完成。其中一臺機器壞了不影響全局。所謂“狼群代替老虎”的戰(zhàn)術，這就是危險分散的意思。把顯示、操作、打印等管理功能集中在一起，用網絡把上述完成控制和顯示的兩部分連成一個系統(tǒng)。當時有人把這種系統(tǒng)稱為集散系統(tǒng)。

產品承諾：
保?證?全新原裝進口,
保?證?安全準時發(fā)貨，
保?證售后服務質量，
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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Triconex?Siemens?Yaskawa?ABB?GE?Ovation?AB?Foxboro?Motorola?Schneider?XYCOM?KUKA ? 專業(yè)銷售進口DCS? PLC系統(tǒng)備件模塊 15天包退換一年質保大量現(xiàn)貨? 國內實力庫存商家

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PLC模塊，可編程控制器，CPU模塊，IO模塊，AI模塊，通訊模塊。AB/施耐德/ABB/GE/本特利/西屋/英維斯/霍尼韋爾/黑馬/FU克斯波羅

15天包退換一年質保大量現(xiàn)貨? 國內實力庫存商家

MVME162-10

描述

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