The following related warnings and errors may be displayed on the drive, depending on the drive model (Sigma, GA700, etc.):
Yaskawa servo systems employ advanced mathematical algorithms to calculate thermal stress. This process uses a continuous (Current squared
More specifically, the A.910 warning occurs These are critical protection alarms that trigger a drive fault, stopping the motor to prevent catastrophic failure.
: Often misread as A910, this occurs when the position error exceeds the allowable limit. A.81 (Encoder Disconnected) : A common alarm on Yaskawa SGDH ServoPacks. OL1 / OL2 (Overload) yaskawa error code a910 link
: Check for high load inertias during deceleration. If the ramp-down time is too short, the DC-link voltage will spike. Parameter Settings : Ensure parameter
The programmed motion profile strains the physical limits of the hardware. Duty cycles with minimal dwell/rest time. Fast acceleration and deceleration profiles.
Check the setting for the overload warning level in your Yaskawa Sigma-7 manual. The following related warnings and errors may be
| Feature | A.910 Overload Warning | True "Link" Communication Error (e.g., bUS, CE) | | :--- | :--- | :--- | | | Mechanical or electrical overload. Network is fine. | Failure in serial or fieldbus network (e.g., EtherNet/IP, Profibus). | | "Link" LED State | Typically active/normal. The link to the controller is still established. | Often OFF or Flashing , indicating a physical break in the network cable. | | Common Error Codes | A.910 , A.710 , A.720 | bUS (Option comms error), CE (Modbus error), EF0 (External fault). | | Primary Causes | Jammed motor, loose power cables, high load, mechanical binding. | Disconnected network cable, damaged connector, incorrect IP/node address. |
If wiring and mechanics are confirmed to be operating within spec, the itself may be faulty.
: Verify the setting of parameter Pn52B . If the application requires higher temporary torque, consider increasing this warning threshold within safe limits. Parameter Settings : Ensure parameter The programmed motion
The error is triggered when:
: It is a pre-alarm designed to give operators a chance to adjust the process before a complete trip occurs.