6SL3055-0AA00-5CA1
IC693ALG221CA
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)，用戶不必自己再設計和制作硬件裝置。用戶在硬件確定以后，在生產(chǎn)工藝流程改變或生產(chǎn)設備更新的情況下，不必改變PLC的硬設備，只需改編程序就可以滿足要求。因此，PLC除應用于單機控制外，在工廠自動化中也被大量采用。
現(xiàn)代PLC不邏輯運算、計時、計數(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、通信、人機對話、自檢、記錄顯示等功能。既可控制一臺生產(chǎn)機械、一條生產(chǎn)線，又可控制一個生產(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和表達方式與繼電器控制電路原理圖相當接近。通過閱讀PLC的用戶手冊或短期培訓，電氣技術(shù)人員和技術(shù)工很快就能學會用梯形圖編制控制程序。同時還提供了功能圖、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號正榮潤園1號樓1205室
PLC在執(zhí)行梯形圖程序時，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)行梯形圖程序的時間要長一些，但對于大多數(shù)機電控制設備來說，是微不足道的，完全可以滿足控制要求。
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