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How to Change the Pulses Per Revolution for the A6 Series Servo Motor

D

Daniel Zhang

Last updated on Jul 14, 2026

The Pulses Per Revolution (PPR) for a servo motor refers to the number of electrical pulse signals required for the motor to complete one full rotation. This is a critical parameter for controlling the motor's rotational accuracy. In the drive's manual, this parameter is listed as C00.02, with a default value of 10000.

The value of C00.02 can be modified using any of the following three methods:

Using the Configuration Software

  1. Click Parameter Management.
  2. Click C00 Group Parameters.
  3. Check the box for C00.02 and enter your desired value in the setting field.
  4. Click Write Selected.

Finally, cycle power to the drive (turn it off and back on) for the change to take effect.

Modifying via Modbus RTU Command (RS-485)

The corresponding Modbus register address for C00.02 is 0002. Send the following command:

01 06 00 02 xx xx CRC CRC

Where xx xx represents the hexadecimal value of the desired number. For example, 5000 in hexadecimal is 13 88. The CRC CRC bytes are the Modbus CRC-16 checksum, which must be calculated based on the preceding bytes. Refer to the Modbus RTU specification or use the configuration software to generate the complete command.

Note: Ensure the servo is disabled (motor de-energized) before modifying this parameter. To save parameters permanently to the drive's non-volatile memory, send the save command after writing the new value:

01 06 0A 05 00 01 CRC CRC

Modifying via the Drive Panel Buttons

After powering on the drive, when the panel defaults to displaying P-rd, proceed as follows:

  • Press the MODE button once. The panel will display C00. blinking.

  • Press the SET button again. The panel will display C00.00 blinking, indicating the current parameter being set is C00.00.

  • Press the UP button twice to increase the value; the panel will display C00.02.

  • Press the SET button again. The panel will now display the lower four digits of the C00.02 value. For values exceeding 9999, you must also set the higher-order digits. Refer to page 182 of the manual for details on navigating between the high, middle, and low digit groups.

  • Use the UP and DOWN buttons to adjust the value.

  • After setting the value, press the SET button to confirm.

Finally, cycle power to the drive (turn it off and back on) for the change to take effect.