IC670MDL331J?

計(jì)算機(jī)與PLC之間的通信是建立在以RS232標(biāo)準(zhǔn)為基礎(chǔ)的異步雙向通信上的，F(xiàn)X系列PLC有其特定的通信格式，整個(gè)通信系統(tǒng)采用上位機(jī)主動(dòng)的通信方式，PLC內(nèi)部不需要編寫專門的通信程序，只要把數(shù)據(jù)存放在相應(yīng)的數(shù)據(jù)寄存器中即可，每個(gè)數(shù)據(jù)寄存器都有相應(yīng)的物理通信地址，通信時(shí)計(jì)算機(jī)直接對(duì)物理通信地址進(jìn)行操作.
可編程序控制器（PLC）是綜合了計(jì)算機(jī)技術(shù)、自動(dòng)控制技術(shù)和通信技術(shù)的新型的、通用的自動(dòng)控制裝置。它具有功能強(qiáng)、可靠性高、使用靈活方便、易于編程及適應(yīng)性強(qiáng)等一系列優(yōu)點(diǎn)。近年來，它在工業(yè)自動(dòng)化、機(jī)電一體化、傳統(tǒng)產(chǎn)業(yè)技術(shù)等方面的應(yīng)用越來越廣，成為現(xiàn)代工業(yè)控制的三大支柱之一。其緊湊的設(shè)計(jì)、良好的擴(kuò)展性、低廉的價(jià)格、強(qiáng)大的指令以及較高的可靠性和簡便的維護(hù),近乎完美的滿足了小規(guī)模的控制要求。壓縮機(jī)組是動(dòng)力的核心，從避免事故和對(duì)機(jī)組保護(hù)的角度考慮，對(duì)機(jī)組的溫度、壓力、和防喘震等都設(shè)計(jì)了嚴(yán)密的聯(lián)鎖程序，在機(jī)組正常運(yùn)轉(zhuǎn)過程中，一旦有控制參數(shù)超標(biāo)或有危害機(jī)組安全的因素，控制系統(tǒng)都要按照聯(lián)鎖保護(hù)程序做出相應(yīng)的處理。PLC處理功能強(qiáng)大、掃描速度快，抗干擾能力強(qiáng)，在機(jī)組的聯(lián)鎖保護(hù)系統(tǒng)中得到了廣泛的應(yīng)用。

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IC670MDL331J?