Possible issues:
The power indicator light is not on
Subdivision too small
Is the current setting too low
Drive protected
Enable terminal level to be high
Unable to respond to control signals


Solution:
Check the power supply circuit and confirm that the polarity of the positive and negative poles of the power supply is correctly connected, and the power cord is reliably connected
Select the right subdivision
Select the right current
Power on again, unable to solve, refer to the description of the alarm indicator light on item
Control the level of the driver side enable port to be low or suspended
Increase the amplitude of the control signal to ensure that the high and low level time of the control signal comply with the description in the manual