描述
是机械移动方向端的防超程(OT)用限位开关输入。
一旦切断输入信号,则可无视检测方向的旋转命令,以伺服电机的最大能力紧急减速、停止。只有通过与检测方向相反方向的脉冲串输入及试运行模式的手动运行(正转命令/反转命令),才能执行(b接点)。
若检测出超程,则位置偏差量被清除。
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