1. Green LED is solid ON, but the motor does not run
Check whether the control signal voltage level setting matches the actual control signal voltage.
The newer version of the driver supports both 5 V and 24 V control signal levels. The factory default is set to 24 V. If your controller outputs a 5 V signal but the driver is still configured for 24 V, the driver will not detect the control signal. As a result, the motor will not run and no alarm will be triggered.
2. Red LED flashes once (overcurrent)
⚠️ Immediately disconnect the power supply before inspecting.
(1) Check whether the wiring is short-circuited.
(2) Check whether the motor windings have a short circuit.
3. Red LED flashes twice (overvoltage)
⚠️ Immediately disconnect the power supply. Check whether the supply voltage exceeds the rated range.
4. Red LED flashes three times (chip error)
Cycle the power supply. If the driver continues to alarm, please contact technical support.
5. Red LED flashes four times (interlock error)
(1) The driver is not connected to the motor, or the connection is poor.
(2) If the alarm occurs when connecting the motor, check the motor power cable connections.
6. Red LED flashes five times (memory error)
Cycle the power supply. If the driver still alarms, please contact technical support.
7. Red LED flashes six times (auto-tuning failure)
Cycle the power supply. If the driver still alarms, please contact technical support.
8. Red LED flashes seven times (position tracking error)
A position tracking error occurs when the deviation between the commanded position and the actual rotor position exceeds one full revolution (360°), which is the default threshold.
(1) Run the motor in open-loop mode: set SW6 (Control Mode) to ON (Open-Loop). If your driver's DIP switch does not include this option, change the setting via the tuning software. If the alarm disappears, it indicates a wiring error.
Motor and encoder wiring:
Bipolar hybrid stepper motor: A+, A-, B+, B-
Incremental encoder: EA+, EA-, EB+, EB-
The encoder and motor wiring must be consistent in phase and rotation direction:
In a closed-loop drive, the encoder's effective signal must be synchronized with the motor's angular displacement signal to achieve proper feedback on motor operation. If the motor's direction of rotation differs from the encoder's logical direction, the erroneous encoder feedback will cause the driver to alarm and the motor to stop.
To correct this, try swapping the A+ and A- wires of the motor.
Note: One way to verify correct motor and encoder wiring is to manually rotate the motor shaft while the driver is powered on but not receiving a control signal. If the motor shaft returns to its original position after you release it, the wiring is correct.
(2) Insufficient motor torque or excessive motor speed
Insufficient motor torque will cause the motor to lose steps. When the accumulated lost steps exceed one full revolution, the driver will trigger an alarm.
The same applies to excessive motor speed. The higher the speed of a stepper motor, the lower its output torque. Running the motor at an excessively high speed will result in insufficient torque.
9. Red LED is solid ON (PCB failure)
Cycle the power supply. If the driver still alarms, please contact technical support.
10. Green LED flashes rapidly
The power supply voltage is unstable, or the driver's internal power module is faulty. Replace the power supply with a known-good unit. If the alarm persists, please contact technical support.