The FU201 fault code appearing on Chnchi Electric servo drives indicates a hardware overcurrent. The main causes of hardware overcurrent are as follows:

Hardware detection of overcurrent. The input command is synchronized with the servo power-on, or the input command is too rapid. Check whether a command was input before the servo panel displayed "Rdy."

Solution:

Command Sequence: After the servo panel displays "Rdy," first enable the servo (S-ON), and then input the command. If possible, add a command filter time constant or increase the acceleration/deceleration time.