描述
系統(tǒng)軟件，對各種工藝控制方案更新是DCS的一項最基本的功能，當某個方案發(fā)生變化后，工程師只需要在工程師站上將更改過的方案編譯后，執(zhí)行下裝命令就可以了，下裝過程是由系統(tǒng)自動完成的，不影響原控制方案運行。系統(tǒng)各種控制軟件與算法可以將工藝要求控制對象控制精度提高。而對于PLC構成的系統(tǒng)來說，工作量極其龐大，首先需要確定所要編輯更新的是哪個PLC，然后要用與之對應的編譯器進行程序編譯，最后再用專用的機器（讀寫器）專門一對一的將程序傳送給這個PLC，在系統(tǒng)調試期間，大量增加調試時間和調試成本，而且極其不利于日后的維護。在控制精度上相差甚遠。這就決定了為什么在大中型控制項目中（500點以上），基本不采用全部由PLC所連接而成的系統(tǒng)的原因。
模塊：DCS系統(tǒng)所有I/O模塊都帶有CPU，可以實現(xiàn)對采集及輸出信號品質判斷與標量變換，故障帶電插拔，隨機更換。而PLC模塊只是簡單電氣轉換單元，沒有智能芯片，故障后相應單元全部癱瘓。
現(xiàn)在高端的PLC與DCS的功能已經(jīng)差不多，DCS對網(wǎng)絡和分布式數(shù)據(jù)庫還要定時掃描有較強的功能，同時對運算和模擬量的處量比較拿手。
PLC還分大、中、小、微PLC，其中微型的只賣幾百塊到2000塊，點數(shù)也好少，大型的可以帶數(shù)千點，運算能力與DCS差不多，但對多機聯(lián)網(wǎng)功能較弱。
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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