plc和電氣工程技術(shù)概述-----外文翻譯.doc
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plc和電氣工程技術(shù)概述-----外文翻譯,可編程邏輯控制器(plc)或可編程控制器是一種數(shù)字化的計算機,應(yīng)用于機電自動化過程的控制,如工廠流水線機械,游戲機,或照明裝置。可編程控制器可用于許多工業(yè)和機器。不同于通用計算機,可編程控制器是專為多輸入多輸出控制要求而設(shè)計的裝置,plc能適應(yīng)更大的工作溫度范圍,更高的抗電氣噪音干擾能力,以及更好的抗震抗沖擊能力??刂?..
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可編程邏輯控制器(PLC)或可編程控制器是一種數(shù)字化的計算機,應(yīng)用于機電自動化過程的控制,如工廠流水線機械,游戲機,或照明裝置。可編程控制器可用于許多工業(yè)和機器。不同于通用計算機,可編程控制器是專為多輸入多輸出控制要求而設(shè)計的裝置,PLC能適應(yīng)更大的工作溫度范圍,更高的抗電氣噪音干擾能力,以及更好的抗震抗沖擊能力??刂茩C器操作的程序通常存儲于備用電池或非揮發(fā)性內(nèi)存中。PLC是一個實時系統(tǒng)實例,因為,其輸出結(jié)果必須在輸入條件下滿足響應(yīng)時間范圍才能產(chǎn)生。否則將會導(dǎo)致誤操作。plc 與其他控制系統(tǒng)的比較 。PLC 廣泛的適用于自動化類任務(wù)處理。在工業(yè)生產(chǎn)過程中,自動化系統(tǒng)的開發(fā)和維護成本占系統(tǒng)譆@殺窘洗蟊壤?,并且灾o褂檬倜諛諳低車謀浠強稍て詰摹lc 包含的輸入輸出設(shè)備和工業(yè)試驗裝置和控制元件相兼容,小型電氣設(shè)計中的需求和設(shè)計問題集中在如何表達所需的操作程序。PLC 應(yīng)用是典型的高度定制系統(tǒng),因此一個成套的PLC價格相較一個具體定制的控制器設(shè)計要低。另一方面,就大批量生產(chǎn)商品而言,用戶定制控制系統(tǒng)更經(jīng)濟,這歸因于該控制系統(tǒng)部件的成本更低,它是替代“泛型”解決方案的更好選擇,并且一次性成本可以覆蓋成千上萬臺器件。對于大批量的或非常簡單的自動化任務(wù),可以使用不同的技術(shù)。例如,一個用戶洗碗機可以由一個量產(chǎn)成本只有幾美元的機電凸輪計時器控制
A programmable logic controller (PLC) or programmable controller is a digital computer used for automation of electromechanical processes, such as control of machinery on factory assembly lines, amusement rides, or lighting fixtures. PLCs are used in many industries and machines. Unlike general-purpose computers, the PLC is designed for multiple inputs and output arrangements, extended temperature ranges, immunity to electrical noise, and resistance to vibration and impact. Programs to control machine operation are typically stored in battery-backed or non-volatile memory. A PLC is an example of a real time system since output results must be produced in response to input conditions within a bounded time, otherwise unintended operation will result.
PLC compared with other control systems
A programmable logic controller (PLC) or programmable controller is a digital computer used for automation of electromechanical processes, such as control of machinery on factory assembly lines, amusement rides, or lighting fixtures. PLCs are used in many industries and machines. Unlike general-purpose computers, the PLC is designed for multiple inputs and output arrangements, extended temperature ranges, immunity to electrical noise, and resistance to vibration and impact. Programs to control machine operation are typically stored in battery-backed or non-volatile memory. A PLC is an example of a real time system since output results must be produced in response to input conditions within a bounded time, otherwise unintended operation will result.
PLC compared with other control systems