描述
梯形图编程语言是从继电器控制系统原理图的基础上演变而来的。PLC的梯形图与继电器控制系统梯形图的基本思想是一致的，但是在使用符号和表达式等方面有一定区别。
梯形图具有形象、直观、简单明了，易于理解的特点，特别适合开关量逻辑控制，是PLC最基本、最普遍的编程语言。
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FANUC MOTOR A06B-0652-B212 W/ ENCODER A860-0300-T002
