版主，您好！谢谢您指点。我从G120手册中查到 。BIT 1 Value 1 Ready to operate -----------Inverter is switched on (ON command is applied), no fault is active,inverter can start when "Enable operation" command is issued. See control word 1, bit 0. 。其中位1 动作的条件“inverter is switched on (on command is applied)”不是太清楚，这时位0 （变频器ON 信号）已经变成 0了啊。还烦请指点，谢谢！