描述
在PLC系統(tǒng)結(jié)構(gòu)不斷發(fā)展的同時(shí),PLC的編程語(yǔ)言也越來(lái)越豐富,功能也不斷提高。除了大多數(shù)PLC使用的梯形圖語(yǔ)言外,為了適應(yīng)各種控制要求,出現(xiàn)了面向順序控制的步進(jìn)編程語(yǔ)言、面向過(guò)程控制的流程圖語(yǔ)言、與計(jì)算機(jī)兼容的高級(jí)語(yǔ)言(BASIC、C語(yǔ)言等)等。多種編程語(yǔ)言的并存、互補(bǔ)與發(fā)展是PLC進(jìn)步的一種趨勢(shì)。
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