Articles on: Trouble Shooting

How to Read the Alarm Lights of T-series Closed-loop Drivers?

1. Green light is always on, but the motor is not working

Check if the control voltage code is the same as the actual code.

The new version of the driver is supplied with a control signal code (5V and 24V). Since the default setting of the driver from the factory is a 24 V control signal, if the user has not changed the code and the actual control signal is 5 V, the driver is as if it is not receiving a signal. The driver does not drive the motor and does not alarm.

2. The red light flashes once (overcurrent)

Immediately turn off the power.

(1) Check if the wiring is shorted;

(2) Check if the motor has a short circuit.

3. The red light flashes twice (overvoltage)

Turn off the power immediately. Check if the supply voltage is too high.

4. The red light flashes three times (chip error)

Restart the power supply. If the driver continues to alarm, please contact customer service.

5. The red light flashes four times (interlock error)

(1) The driver is not connected to the motor or has poor contact.

(2) If an alarm occurs when connecting the motor, please check the motor power line connection.

6. The red light flashes five times (memory error)

Restart the power supply. If the driver still alarms, please contact after-sales service.

7. The red light flashes six times (unable to auto-tune)

Restart the power supply. If the driver still alarms, please contact after-sales service.

8. The red light flashes seven times (position tracking error)

Position tracking error means that the difference between the theoretical running angle of the motor and the actual running angle exceeds one circle (default setting).

(1) Make the motor run in open loop mode [set "SW6 (controlmode)" to "ON (open)", if the dip switch does not have this function, modify it in the tuning software], if the alarm disappears, it means there is a wiring error;

Motor and encoder wiring:

Bipolar hybrid motor: A+, A-, B+, B-.

Incremental encoder: EA+, EA-, EB+, EB-.

The encoder and motor wiring must be kept consistent in phase and rotation direction:

In a closed-loop drive, the effective signal of the encoder must be synchronized with the motor angle displacement signal to achieve effective feedback on the motor operation. Once the motor movement direction is different from the logical direction of the encoder, the erroneous feedback from the encoder will cause the driver to alarm and the motor to stop running.

At this time, we can try swapping the A+ and A- of the motor.

Note: One way to determine the wiring of the motor and encoder is to twist the motor shaft under external force when the driver is powered on and not connected to the control signal. If the motor shaft returns to its original position after releasing the external force, the wiring is correct.

(2) Insufficient motor torque or excessive motor speed

Insufficient motor torque will cause the motor to lose steps, and when the lost steps exceed one circle, the driver will alarm.

The same is true for excessive motor speed. The higher the speed of the stepper motor, the smaller the torque. Excessive motor speed will cause insufficient torque.

9. The red light is always on (PCB board burned out)

Restart the power supply. If the driver still alarms, please contact after-sales service.

10. Green light flashes quickly

The power supply voltage is unstable or the drive power module is broken. Replace the power supply with a good one. If the alarm still occurs, please contact the after-sales service.

Updated on: 31/10/2023

Was this article helpful?

Share your feedback


Thank you!