描述
PLC可以用于圆周运动或直线运动的控制。目前，大多数的PLC制造商都提供拖动步进电机或伺服电机的单轴或多轴位置控制模块，这一功能可广泛用于各种机械，如金属切削机床、金属成型机床、机器人、电梯等。
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