6ES5490-8FB11
ACS3-230/20-01-240-405D4
PLC品種齊全的各種硬件裝置，可以組成能滿足各種要求的控制系統(tǒng)，用戶不必自己再設(shè)計(jì)和制作硬件裝置。用戶在硬件確定以后，在生產(chǎn)工藝流程改變或生產(chǎn)設(shè)備更新的情況下，不必改變PLC的硬設(shè)備，只需改編程序就可以滿足要求。因此，PLC除應(yīng)用于單機(jī)控制外，在工廠自動(dòng)化中也被大量采用。
現(xiàn)代PLC不邏輯運(yùn)算、計(jì)時(shí)、計(jì)數(shù)、順序控制等功能，還具有數(shù)字和模擬量的輸入輸出、功率驅(qū)動(dòng)、通信、人機(jī)對(duì)話、自檢、記錄顯示等功能。既可控制一臺(tái)生產(chǎn)機(jī)械、一條生產(chǎn)線，又可控制一個(gè)生產(chǎn)過程。
目前，大多數(shù)PLC仍采用繼電控制形式的“梯形圖編程方式”。既繼承了傳統(tǒng)控制線路的清晰直觀，又考慮到大多數(shù)工廠企業(yè)電氣技術(shù)人員的讀圖習(xí)慣及編程水平，所以非常容易接受和掌握。梯形圖語言的編程元件的符號(hào)和表達(dá)方式與繼電器控制電路原理圖相當(dāng)接近。通過閱讀PLC的用戶手冊(cè)或短期培訓(xùn)，電氣技術(shù)人員和技術(shù)工很快就能學(xué)會(huì)用梯形圖編制控制程序。同時(shí)還提供了功能圖、語句表等編程語言
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公司全稱：福州卓凱電子科技有限公司
公司地址：福建省福州市閩侯西江濱大道77號(hào)正榮潤園1號(hào)樓1205室
PLC在執(zhí)行梯形圖程序時(shí)，用解釋程序?qū)⑺g成匯編語言然后執(zhí)行（PLC內(nèi)部增加了解釋程序）。與直接執(zhí)行匯編語言編寫的用戶程序相比，執(zhí)行梯形圖程序的時(shí)間要長一些，但對(duì)于大多數(shù)機(jī)電控制設(shè)備來說，是微不足道的，完全可以滿足控制要求。
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