IC693CBL300-GE數(shù)據(jù)線 IC693CBL300-GE數(shù)據(jù)線IC693CBL300-GE數(shù)據(jù)線
因?yàn)楝F(xiàn)在電梯己大多采用多微機(jī)網(wǎng)絡(luò)控制系統(tǒng),串行通信、智能化管理、變頻調(diào)速等技術(shù)使電梯的可靠性與舒適感大大提高,傳統(tǒng)的繼電器控制系統(tǒng)己退出了歷史的舞臺(tái)。所以許多電梯同行對(duì)繼電器控制系統(tǒng)己非常陌生。其實(shí)電梯的控制邏輯還是從繼電器控制系統(tǒng)逐漸進(jìn)化而來的。特別是想了解PLC應(yīng)用及編程的朋友,因?yàn)?/span>PLC梯形圖結(jié)構(gòu)與繼電器回路圖極為相似,所以這里有必要先從繼電器控制系統(tǒng)入手。只有熟悉了繼電器控制電路,才能更好地用PLC編程。
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