Yaskawa Error Code A910 //free\\
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In Yaskawa systems, the code A.910 is an Overload Warning. This minor fault or alarm typically indicates that the motor is drawing current near its rated capacity and is on the verge of a critical overload trip (such as A.710 or A.720). Report for Yaskawa Error Code A.910 Description Alarm Name Overload Warning Status Minor Fault/Warning (ALM LED usually flashes) Primary Meaning
The drive has detected a load that exceeds the motor's continuous rating for a specific duration, but has not yet reached the trip point. Common Causes
Mechanical Issues: Excessive load due to mechanical friction, binding, or a sudden obstruction in the machine.
Operating Conditions: The starting torque exceeds the maximum allowed torque, or the motor is operating at peak capacity for too long.
Wiring Faults: Incorrect or loose contact in the servomotor or encoder wiring.
Environmental Factors: High ambient temperature inside the SERVOPACK panel (exceeding 55∘C55 raised to the composed with power C
Parameter Settings: The overload warning level (parameter Pn52B) is set too low for the current application. Recommended Corrective Actions
Check Mechanical Load: Inspect the connected machinery for jams, lack of lubrication, or increased friction.
Verify Wiring: Ensure all motor and encoder cable connections are secure and correctly pinned.
Adjust Parameters: If the load is normal but the warning is premature, verify the setting of Pn52B (Overload Warning Level).
Cooling Check: Ensure panel fans are operational and the temperature is within the specified range ( 55∘C55 raised to the composed with power C
Monitor Operation: Use the monitor function (e.g., Un006 for motor load ratio) to see how close the system is to a full overload alarm. Note on Robot Controllers DX100 ALARM CODE 0910 CPU ERROR (YCP01)
DX100 ALARM CODE 0910 CPU ERROR (YCP01) – Yaskawa Motoman. Yaskawa Knowledge Center NX100 ALARM CODE 0910 CPU ERROR (NCP01)
Here is the detailed content regarding the Yaskawa Error Code A910.
This error appears primarily on Yaskawa V1000, J1000, U1000, and GA800 series drives.
Need the full list of Yaskawa error codes?
The Yaskawa error code A.910 is not a fatal "fault" that stops the machine immediately, but a Warning for Overload. It is essentially the drive’s way of saying, "I am working too hard, and if this continues, I will shut down to protect myself."
Here is a story of a long night on the factory floor, illustrating how this error occurs and how to fix it. The Ghost in the Assembly Line: A Tale of A.910 yaskawa error code a910
The clock on the wall of the automotive plant read 2:14 AM when the line stuttered.
Jack, the head maintenance tech, didn't need to hear the alarm to know something was wrong. He could feel it in the floorboards—a subtle change in the vibration of the Sigma-7 servo motors that powered the main conveyor. He walked over to the control panel of the lead SERVOPACK. The small seven-segment display was blinking a steady, rhythmic code: A.910. The Warning Before the Storm "At least it's not an A.710 yet," Jack muttered.
He knew A.910 was the "Overload Warning". It meant the motor was drawing more torque than it was rated for, but hadn't yet reached the breaking point where it would trigger a hard fault (A.710 or A.720) and crash the line. The drive was giving him a chance to fix it before the thermal protection kicked in. The Investigation
Jack started his mental checklist, knowing the common culprits for an A.910: Mechanical Friction: Was a bearing seizing up?
Wiring Issues: Was there a loose contact in the motor or encoder cables?
Parameter Sensitivity: Was the warning level (Pn52B) set too low for the current job? Environment: Was the control cabinet overheating?
He grabbed his infrared thermometer. The SERVOPACK panel was at 48°C—warm, but well below the 55°C limit. Heat wasn't the ghost tonight. Finding the Friction
Jack moved to the conveyor belt itself. He noticed a slight buildup of debris near the drive pulley—metal shavings from the day shift had wedged themselves into the guide rail. Every time the servo tried to accelerate the heavy pallet, it had to fight through that extra resistance. The motor was pulling 110% of its rated torque just to keep up. "There you are," he said. The Resolution
Jack cleared the debris and reapplied high-temp grease to the rails. He returned to the panel and watched the load monitor (Un002). The torque percentage dropped from the "danger zone" back down to a comfortable 65%.
He didn't even have to reset the drive; because A.910 is a warning, it cleared itself once the operating conditions returned to normal. The conveyor sped back up, the "Ghost" was gone, and the factory floor returned to its steady, industrial hum. Technical Summary of A.910 🛠️ Alarm Name Overload Warning Severity
Minor (Warning) - Does not always stop the motor immediately. Triggers
Occurs when torque or current exceeds the rated level for a period of time. Next Step
If ignored, will lead to hard faults A.710 (High Load) or A.720 (Low Load). Common Fixes
Check Mechanicals: Look for jams, binding, or lack of lubrication.
Verify Wiring: Ensure U, V, and W power phases and encoder cables are secure.
Adjust Parameters: Check Pn52B (Overload Warning Level). If the application naturally runs high, this may need to be increased slightly.
Resize Motor: If the load is consistently too heavy, a higher-capacity motor/drive combo may be required. If you are currently facing this error, let me know: In Yaskawa systems, the code A
Which Yaskawa series are you using (Sigma-5, Sigma-7, etc.)?
Does the error happen at startup or during a specific movement? Have you recently changed the load or the program? Table 1 - Yaskawa
The Yaskawa error code A.910 is an Overload Warning. It is a proactive alert indicating that the servomotor is operating at a load level that will soon trigger a hard fault (A.710 or A.720) if the condition persists. 🛠️ Understanding A.910: Overload Warning
Unlike a "Fault" (which immediately stops the motor), a "Warning" allows the motor to continue running while notifying the operator of an impending issue. Primary Causes
Mechanical Binding: Excessive friction or a physical obstruction in the machinery.
Incorrect Sizing: The motor’s rated torque is too low for the current load inertia or application demands.
Rapid Acceleration: Aggressive acceleration/deceleration ramps are drawing excessive current.
Wiring Issues: Poor connections between the SERVOPACK and the motor. 🔍 Troubleshooting Steps
If your display shows A.910, follow these steps to prevent a full system shutdown: 1. Check the Mechanical Load
Inspect the hardware: Rotate the motor shaft manually (if safe) to check for physical resistance.
Lubrication: Ensure all bearings, gears, and slides are properly lubricated to reduce friction. 2. Verify Parameter Settings
Check Pn520: This parameter often controls the position error pulse overflow; if set too tight, it can mimic overload behavior.
Acceleration/Deceleration: Increase the "S-curve" or ramp times to reduce the instantaneous torque required from the motor. 3. Monitor Real-Time Data Use the SigmaWin+ software to monitor the Torque Reference.
If the torque reference is consistently above 100% of the motor's rated capacity, the load must be reduced. 4. Hardware Inspection
Cables: Ensure the motor and encoder cables are not damaged or experiencing interference.
Brakes: Verify that the motor's mechanical brake is fully releasing when the servo is turned ON. ⚠️ Impending Faults (The "Next Step")
If A.910 is ignored, the drive will eventually transition into one of these hard faults: A.710: Instantaneous Overload (High Load). A.720: Continuous Overload (Low Load). To help you resolve this faster, could you tell me: [ ] Mechanical integrity (shaft, belt, coupling)
What series of Yaskawa drive are you using (e.g., Sigma-5, Sigma-7, GA700)?
Is the error happening during a specific movement or while the motor is holding position?
Have there been any recent mechanical changes to the machine? Using Stall Prevention to Suppress Overloads - Yaskawa
In Yaskawa systems, the code typically indicates an Overload Warning
. Depending on whether you are using a Servo Drive or a Robot Controller, the specific implications and fixes vary. 1. Yaskawa Servo Drives (Sigma Series) For Yaskawa servo drives (like Sigma-5 or Sigma-7),
is a warning that the motor is operating near its thermal limit. It is a "pre-alarm" that occurs before the drive trips on a hard overload fault (like A.710 or A.720).
The servomotor has been operating at a torque level exceeding its rating for a sustained period. Common Causes: High Load:
The motor is pushing or pulling more weight than it is rated for. High Ambient Temp: The surrounding environment is hotter than 40°C ( Mechanical Bind:
There is friction or a jam in the mechanical system the motor is driving. Wiring/Encoder Issues:
A faulty encoder or internal circuit can sometimes trigger false thermal readings. Recommended Actions: Reduce Load: Decrease the cycle rate or the weight the motor is moving. Check Mechanics:
Ensure there are no physical obstructions or worn-out bearings causing extra friction.
Ensure the drive's cooling fan is working and the cabinet has proper ventilation. MachMotion 2. Yaskawa Motoman Robots (DX100, FS100) On robot controllers, the code is often categorized as a related to specific communication or internal board issues. Yaskawa Knowledge Center DX100 / FS100 Controllers: Typically indicates a CPU Error (YCP01 or CPU-201R) Common Causes: Faulty internal control board. Loose connection between the CPU board and the backplane. Corrupted system software or CMOS data. Recommended Actions: Power Cycle:
Turn the controller off, wait 30 seconds, and turn it back on. Reseat Boards: With power off, carefully reseat the CPU board in its slot. Technical Support:
If the error persists, the CPU board may need repair or replacement through the Yaskawa Motoman Support Center Yaskawa Knowledge Center
For further assistance, you can find official documentation and manuals on the Yaskawa Technical Document Library Are you seeing this code on a servo drive display robot teach pendant Yaskawa Servo Drive Alarm Codes Guide | PDF - Scribd
For drives powered by separate control terminals (e.g., S1, S2 for 24VDC), an unstable control supply can sometimes miscommunicate with the main board, indirectly causing a main circuit undervoltage detection logic fault.