Articles on: Trouble Shooting

Why Does the Motor Not Rotate After I Connect My Pulse Controller to the A6 Driver?


The A6-RS series supports pulse signal control from 5V to 24V. Before wiring, please verify the output signal voltage of your controller (most small controller boards output 5 V, while many PLCs output 24 V). The wiring methods are described separately below:


1. Wiring Inspection:


The A6-RS series supports pulse signal control between 5-24V. Before wiring, please confirm the signal voltage output by your controller (typically, small controller boards are 5V, while most PLCs are 24V). We will discuss each case separately:


1.1. Wiring for a 5V Pulse Signal


Please refer to Page 44 of the driver manual.

  • Connect the controller's PULSE+ to pin 41 of the driver's CN1 connector.
  • Connect the controller's PULSE- to pin 43 of the driver's CN1 connector.
  • Connect the controller's DIR+ to pin 37 of the driver's CN1 connector.
  • Connect the controller's DIR- to pin 39 of the driver's CN1 connector.

Note: Pin 29 (GND) may be left unconnected. This step is primarily to prevent signal interference.


1.2. Wiring for a 24V Pulse Signal


Please refer to Page 45 of the driver manual.


  • Using the driver's internal 24V supply, short-circuit pins 17 and 35 of the driver's CN1 connector.
  • Connect the controller's pulse signal to pin 43 of the driver's CN1 connector.
  • Connect the controller's direction signal to pin 39 of the driver's CN1 connector.
  • Connect the controller's GND (signal negative) to pin 14 of the driver's CN1 connector.

Ensure all wiring matches the above instructions and that the controller is correctly outputting a 5V or 24V pulse signal (you can verify the voltage using a multimeter).


At this point, external wiring issues can generally be ruled out. Next, check if the servo enable is activated.


Servo Enable:


To put it simply, the enable signal is a critical prerequisite for the servo motor to execute any command. If the enable is not active, the driver will not respond to commands from the controller, regardless of the number issued.

For the A6-RS series driver, the enable function is assigned to the DI5 port.


Enabling the driver essentially means triggering DI5. There are several methods; we will first introduce the simplest wiring approach:


1) Control via an External 24V Power Supply:


Prepare a 24V DC power supply.

  • Connect the 24V+ to pin 11 of the CN1 connector.
  • Connect the 0V to pin 33 of the CN1 connector.
  • When the power supply is energized, the enable is activated. When it is turned off, the enable is deactivated.

The diagram below shows the complete wiring between our A6-RS driver and an engraving machine controller board.



2) Control via Driver Parameters:


What if a suitable 24V DC power supply is unavailable?

We also provide a method to control the enable through driver parameters. Using the driver's keypad or software, simply set parameter C04.11 to 1 to enable the driver, and set it to 0 to disable it.


3) Control Using the Driver's Internal 24V Power Supply:


  • Short-circuit pins 17 and 33 of the CN1 connector.
  • Short-circuit pins 33 and 14 of the CN1 connector.


This method does not require an external 24V DC power supply or manual parameter setting. However, it does not allow for easy on/off control of the enable. It is recommended to control it via an external relay for better manageability.


How to Determine if the Enable is Successfully Activated?


  • Observe the Driver's Display Panel:

For the A6-RS series driver, after connecting the motor and powering on, the panel will display "P-rd". Once the enable is successfully activated, the display will change to "P-rn".


  • Manual Resistance Test:

When the enable is active, the driver will emit a faint sound, and the motor shaft will become locked. Attempting to turn it by hand will reveal significant resistance.

Please note: For motors equipped with brakes, if the brake is not released, the motor shaft cannot be turned by hand even when the enable is not activated. For instructions on brake usage, please refer to: 

Brake Wiring Instructions for A6 Series Servo Motors


2. Driver Parameter Troubleshooting


Assuming wiring is correct and the enable signal is active, proceed to verify the parameter settings.


1) Control Mode


Ensure the driver's control mode is set to Position Mode: C00.00 = 0.

The driver's default factory setting is Position Mode. When powered on, the panel will display "P-rd", where the "P" indicates Position Mode. No additional setup is required under factory default conditions.


2) Position Command Source


Ensure the driver's position command source is set to Pulse Command: C03.00 = 0.

Similarly, the default factory setting for the position command source is Pulse Command. No adjustment is necessary in the factory default state.


3) Pulse Channel Selection


As mentioned in the wiring instructions in section 1, the Standard Channel is used by default: C00.22 = 0.

Same as above, no changes are required under factory default settings.

(Note: If you intend to use the High-Speed Channel, please be aware that the corresponding pulse and direction signal inputs on connector CN1 change to pins 38/36/42/40.)


3. Cross-Testing


If the motor still fails to operate after eliminating the interfering factors mentioned in sections 1 and 2, proceed with the following cross-tests for verification.


1) Verify the Motor Itself Can Rotate Normally


Please refer to the instructions on Page 185 of the driver manual.


If the JOG operation functions normally, the motor itself can be ruled out as the cause.


2) Verify the Pulse Controller and Cabling


Keep the motor and driver unchanged. Connect the controller to another servo driver or stepper driver. Under identical settings, test whether the issue lies with the pulse controller or the signal cables.


3) Verify the Servo Driver for Issues


Keep the motor and controller unchanged. Replace the original driver with a new one in the system. If the motor operates normally, please check if the pulse input pins on the faulty driver are damaged (you can use a multimeter to test pin conductivity. There is a high probability of pin port damage if a 24V pulse signal was accidentally connected to a 5V system).

If the issue persists after carefully checking all the steps above, please contact us promptly and provide clear, relevant photos and video documentation.


4. Summary


Under normal circumstances, a newly unboxed A6-RS series servo motor can be made operational via pulse control by following these steps:

  • Correctly wire the pulse and direction signals.
  • Enable the driver.
  • Release the brake (for motors equipped with one).


Updated on: 29/12/2025

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