FAQS

Follow the steps below to troubleshoot servo drive overheating alarms:

• Check for excessive ambient temperature. Verify that the electrical cabinet is equipped with cooling fans and features reasonable ventilation and heat dissipation layout.

• Inspect the drive cooling fan for damage or failure. Monitor the temperature value via parameter d0-19; the servo will trigger an overheating alarm once the temperature exceeds 85°C.

• Check the real-time load rate via d0-09 to ensure the operating load stays within 100% of the rated range.

Follow the steps below to troubleshoot servo encoder error alarms:

• Verify that the correct motor code and protocol are configured according to the motor nameplate. Incorrect protocol settings for Tamagawa and Sanyo motors will trigger encoder errors.

• Check the encoder connector for looseness and poor contact. Confirm the cable is a shielded twisted pair with properly grounded shielding layer and a single-core wire diameter of no less than 0.3mm².

• Ensure reliable system grounding. Verify that the power supply ground and motor ground are firmly connected. The cabinet ground and equipment ground should be wired separately and securely connected to the factory earth ground.

• Power off the system, then swap the encoder cables and power cables between the faulty motor and a fault-free motor of the same model, and update the controller station address accordingly. If the alarm follows the cables, the fault lies with the encoder cable, the motor, or both. If the alarm follows the drive, the servo drive itself is defective and requires maintenance or replacement.

Follow the steps below to troubleshoot servo communication disconnection alarms:

• Check for unsynchronized communication cycles between the controller and servo drive: a. Verify that the parameter P0-50 is set equal to d0-52 divided by 4. b. Observe whether the values of d0-07 and d0-64 keep increasing. Continuous value accumulation indicates unstable communication and electromagnetic interference. It is recommended to use industrial Cat5e or higher Ethernet cables with ferrite cores, route network cables separately from power cables, and install filters on power lines. Stable communication is confirmed when d0-07 and d0-64 remain fixed at steady values.

• Check the flashing status of the network port indicators on both the controller and the servo drive.

• Rule out faulty Ethernet cables between the control system and the drive by replacing the cable for testing.

• Inspect and ensure all grounding connections are firm and reliable.

Follow the steps below to troubleshoot servo battery failure alarms:

• Measure the battery voltage with a multimeter. If the voltage is lower than 3.3V, perform axis homing, replace the battery with a new one, clear the alarm record, and recalibrate the zero position of the axis.

• If the battery voltage is higher than 3.3V, inspect the encoder connector for poor contact. If the alarm recurs within 1 minute after being cleared, check the encoder cable for short circuits, open circuits or cold solder joints. Replace the battery board or battery box if no cable faults are found.

• Inspect the battery power supply circuit for short circuits or open circuits.

• Check the motor battery pins for short circuits or open circuits.

Follow the steps below to troubleshoot servo multi-turn position loss alarms:

• Measure the battery voltage with a multimeter. If the voltage reads 3.6V, the alarm is generally caused by encoder cable re-plugging. Simply clear the alarm and recalibrate the axis zero position.

• If the battery voltage is lower than 3.0V, replace the battery with a new one, clear the alarm record, and recalibrate the zero position of the axis.

• Inspect the battery power supply circuit for short circuits or open circuits.

• Check the motor battery pins for short circuits or open circuits.

• If the battery voltage and power circuit are normal but the alarm triggers repeatedly after every reboot, restore the drive to factory settings. Disable the servo, set parameter P0-03 to 0100, wait until P0-03 returns to 0000, then power cycle the drive to complete the reset.