可編程控制器廣泛運用于工業現場工作中。了解plc可編程控制器原理有助于人們更好更順利地工作。本文就可編程控制器實現控制的要點來分析研究plc可編程控制器原理。

　　它源于繼電控制裝置，但它不像繼電裝置那樣，通過電路的物理過程實現控制，而主要靠運行存儲于PLC內存中的程序，進行入出信息變換實現控制。

　　PLC基于電子計算機，但并不等同于普通計算機。普遍計算機進行入出信息變換，多只考慮信息本身，信息的入出，只要人機界面好就可以了。而PLC則還要考慮信息入出的可靠性、實時性，以及信息的使用等問題。特別要考慮怎么適應于工業環境，如便于安裝，抗干擾等問題。

　　可編程控制器實現控制的要點

　　入出信息變換、可靠物理實現，可以說是PLC實現控制的兩個基本要點。

　　入出信息變換靠運行存儲于PLC內存中的程序實現。PLC程序既有生產廠家的系統程序(不可更改)，又有用戶自行開發的應用(用戶)程序。系統程序提供運行平臺，同時，還為PLC程序可靠運行及信號與信息轉換進行必要的公共處理。用戶程序由用戶按控制要求設計。什么樣的控制要求，就應有什么樣的用戶程序。Basler Electric Transformer BE15062002 120V LO 240/480V HI New

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