Positive sign: The axes moves in the larger direction Negative sign: The axes moves in the smaller direction Exception: The axis cannot move to modulo -0, since zero has no sign 模式定位与传统的定位的编程方式相同。 MOD命令对特殊的程序块有效,对选择需要进行模式操作的每根轴都必须显示地编程。