3HAC023911-001
3HAC023911-001
3HAC023911-001
18、什么是I/O余量?
與冗余不同，I/O余量只是系統(tǒng)中I/O數(shù)量大于應(yīng)用的要求，這種余量只是數(shù)量上的，主要目的是使系統(tǒng)今后有繼續(xù)加入控制信號的可能。
自動化
工業(yè)控制自動化主要包含三個層次，從下往上依次是基礎(chǔ)自動化、過程自動化和管理自動化，其核心是基礎(chǔ)自動化和過程自動化。
傳統(tǒng)的自動化系統(tǒng)，基礎(chǔ)自動化部分基本被PLC和DCS所壟斷，過程自動化和管理自動化部分主要是由各種進口的過程計算機或小型機組成，其硬件、系統(tǒng)軟件和應(yīng)用軟件的價格之高令眾多企業(yè)望而卻步。
20世紀(jì)90年代以來，由于PC-based的工業(yè)計算機(簡稱工業(yè)PC)的發(fā)展，以工業(yè)PC、I/O裝置、監(jiān)控裝置、控制網(wǎng)絡(luò)組成的PC-based的自動化系統(tǒng)得到了迅速普及，成為實現(xiàn)低成本工業(yè)自動化的重要途徑。我國重慶鋼鐵公司這樣的大企業(yè)的幾乎全部大型加熱爐，也拆除了原來DCS或單回路數(shù)字式調(diào)節(jié)器，而改用工業(yè)PC來組成控制系統(tǒng)，并采用模糊控制算法，獲得了良好效果。
【公 司】： 福建鴻飛達自動化科技有限公司
【主 營】： AB(羅克韋爾)PLC全系列、ABB機器人系統(tǒng)備件、施耐德140/TSX、西門子6SN/6FC、伺服系統(tǒng)全套等
【價 格】： 電議
【發(fā)布人】： 程先生
【電 話】： 15306977024 13625073704
【所在地】： 福建 - 福州
【坐 機】： 0591-83532940
【Q Q】： 2851617309
【傳 真】： 0591-88263940
【郵 箱】： 2851617309@qq.com
產(chǎn)品價格以電話或者QQ詢價為準(zhǔn)，發(fā)布價格不做參考，圖片也一樣
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