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Yaskawa Error Code A910 Link ~upd~

The Yaskawa A.910 error code indicates an Overload Warning. This is a cautionary status that precedes more critical overload alarms like A.710 (Instantaneous Overload) or A.720 (Continuous Overload). If the underlying cause is not addressed, the drive will eventually trip a full alarm to prevent the servomotor from overheating. Common Causes

Mechanical Load Issues: The motor is encountering more physical resistance than it is designed to handle, often due to binding, friction, or an oversized load.

Incorrect Wiring: Faulty contacts or incorrect wiring between the SERVOPACK, servomotor, or encoder can trigger this warning.

Operating Conditions: The motor is operating for extended periods at torques that exceed its ratings, or the starting torque required is too high.

Parameter Settings: The overload warning level (parameter Pn52B) might be set too low or is unsuitable for the current application.

Environmental Factors: Excessive heat within the SERVOPACK panel (above ) can contribute to overload conditions. Troubleshooting and Remedies

Check Mechanical Systems: Inspect the machinery for any physical obstructions, mechanical wear, or binding that could be increasing the motor's workload.

Verify Wiring: Ensure all power and encoder cables are securely connected and free of damage. Use the Yaskawa troubleshooting guide to verify correct pinouts. yaskawa error code a910 link

Adjust Parameters: If the mechanical load is within spec, check parameter Pn52B to ensure the warning threshold is appropriate for your operation.

Review Motor Capacity: If the load is consistently high, you may need to reconsider the load requirements or upgrade to a motor with a higher capacity.

Cooling: Ensure the SERVOPACK has adequate ventilation and that the internal cabinet temperature is maintained at safe levels. Reference for Related Alarms A.910 Overload Warning Pre-alarm (Warning) A.710 Instantaneous Overload Critical Alarm A.720 Continuous Overload Critical Alarm

For more detailed technical specifications on detection timing, refer to the Yaskawa Sigma-7 Manual. A.910 fault in Yaskawa Sigma 7 servo drive - Click2Electro

The Yaskawa error code A910 indicates a "Communications error (serial communications)" — specifically a transmission data fault between the drive and the keypad, optional digital operator, or serial communication link.

Key info for “A910 link”:

  • Cause:
    The serial communications link has failed or is intermittent. This often happens with the RS-422/RS-485 connection to a remote keypad (like a JVOP-180) or a host controller (PLC, HMI). The Yaskawa A

  • Common scenarios:

    • Loose or broken wiring on terminals R+, R-, S+, S- (for MEMOBUS/Modbus).
    • Noise interference on the communication line.
    • Wrong communication parameter settings (e.g., baud rate, parity, slave address mismatch).
    • Using an incompatible operator or cable.
    • Damaged drive communication port.

  • Troubleshooting steps for the link:

    1. Power cycle the drive – transient faults may clear.
    2. Check wiring – ensure twisted-pair shielded cable is used, shield grounded only at one end.
    3. Verify termination resistors – set correctly for the network.
    4. Test with a local keypad (directly mounted on drive) – if A910 clears, the link/cable/remote device is the problem.
    5. Reduce electrical noise – separate comm lines from power cables, use ferrite cores.
    6. Check settings – o1-05 (LCD contrast not related), but focus on F6-xx (for digital operator), H5-xx (for serial comm). Ensure parity, stop bits, baud rate match all devices.
    7. Replace cable – if damaged.

  • If fault persists:
    The drive’s serial port may be damaged, requiring drive repair/replacement.

For a precise solution, note your Yaskawa drive model (e.g., GA800, GA500, U1000, V1000, A1000, J1000) – A910 behavior is nearly identical across modern Yaskawa AC drives, but terminal locations and parameter numbers can vary slightly.

Would you like the exact parameters to check for your specific model?

Here’s a concise review and troubleshooting guide for the Yaskawa error code A910 related to the link (communication).

Troubleshooting Yaskawa Error Code A910: Link, Causes, and Fixes

Error Code A910 is one of the more cryptic yet critical alarms in the Yaskawa drive ecosystem. If you are seeing A910 flash across your HMI (Digital Operator), your drive is not dead—but it is signaling a fundamental breakdown in communication between its internal control board and the optional communication card. Cause: The serial communications link has failed or

The specific keyword phrase associated with this fault is "Yaskawa error code A910 link." Understanding the "link" in this context is the key to solving the problem. Unlike a simple overload or overvoltage fault, A910 points to a physical or logical disconnection between the drive’s main CPU (Control Board) and the communication module (e.g., EtherNet/IP, Profibus, DeviceNet, or CC-Link).

This article will dissect exactly what this error means, why it happens, and a step-by-step procedure to clear it permanently.

Step 1: Verify Parameter Settings

Check parameter L3-02 (Motor Rated Current).

  • Compare this value to the motor nameplate rated current.
  • Issue: If L3-02 is set lower than the nameplate, the drive restricts the motor prematurely.
  • Fix: Adjust L3-02 to match the motor nameplate exactly.

Preventing Recurrence of the A910 Link Error

Once you have cleared the error, implement these best practices to avoid seeing "Yaskawa error code A910 link" again:

  1. Cable Strain Relief: Ensure communication cables (Ethernet, Profibus) are not pulling downward on the option card’s RJ45 or DB9 connector. Use zip ties to secure cables to the drive chassis.
  2. Grounding: Verify that the option card’s ground screw is connected to the same ground bus as the drive. Floating grounds cause erratic "link" failures.
  3. Periodic Inspection: During quarterly PM (preventative maintenance), power down and reseat all option cards.
  4. Thermal Management: If the drive is in a cabinet exceeding 50°C (122°F), add a cabinet fan. Heat expands metals at different rates, breaking the "link" connection.

3. Faulty Option Card

The card itself may have suffered an ESD (electrostatic discharge) strike or internal component failure. A short on the option card’s power rail will cause it to fail the power-on handshake.

Error: A910

Meaning: Output Phase Loss (One or more output phases (U, V, W) to the motor are open/missing.)