When troubleshooting an active A.910 warning link, engineers generally categorize the root issues into mechanical, electrical, and programming categories. 1. Mechanical Binding and Excessive External Load
Reduce the machine cycle rate, lower acceleration/deceleration profiles, or retrofit the axis with a higher-capacity Yaskawa servomotor. 2. Mechanical Bind or Excessive Load
Note: This article covers A.910 (Link Fault/Communication Error), which is different from A.10 (Overcurrent) or A.09 (Position Limit). What is Yaskawa Error Code A910? yaskawa error code a910 link
It is critical to confirm what device is showing the code. Yaskawa uses overlapping numerical schemas across its product ecosystems: Hardware Type Code Format Primary Meaning Core Component At Fault Sigma Servo Drives Go to product viewer dialog for this item. A.910 Motor Overload Warning External motor, axis mechanics, or parameter Pn52B . DX100 Robot Controllers Go to product viewer dialog for this item. 0910 YCP01 CPU Error Main control rack logic board processor failure FS100 Robot Controllers Go to product viewer dialog for this item. 0910 CPU-201R CPU Error Internal logic board communication disruption.
: 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) When troubleshooting an active A
: Incorrect or loose contact in the servomotor or encoder wiring. Environmental Factors
The system triggers an when the thermal calculation reaches a factory-preset warning margin. This margin is usually around 20% below the hard-fault trip point. This design gives automated systems or operators a brief window to reduce the load or safely cycle down the process before a sudden shutdown happens. 4 Root Causes of Yaskawa A.910 Errors It is critical to confirm what device is showing the code
: Regularly track the root-mean-square (RMS) torque percentage in your preventative maintenance checklists to spot mechanical wear before alarms trigger.
| Parameter | Description | Role in A910 | | :--- | :--- | :--- | | | Electronic Thermal Selection | Enables/Disables the protection feature that generates A910. | | L3-02 | Motor Rated Current | Critical. Sets the baseline for the overload calculation. Must match the motor nameplate. | | L3-03 | Electronic Thermal Time | Sets how long the motor can sustain an overload before the alarm/trip occurs. | | L3-04 | Overload Warning Level | Sets the percentage of current that specifically triggers the A910 warning (default is usually very close to the trip point). | | U1-03 | Monitor: Output Current | Used for real-time diagnostics to verify if the motor is actually drawing too many amps. |