Yaskawa Error Code A910 Exclusive [work] 〈2027〉

Yaskawa Error Code A910: Understanding the “Exclusive” Alarm

In the world of industrial automation, Yaskawa drives (specifically the GA800, GA700, A1000, and U1000 series) are known for their reliability. However, when an error code appears, it demands immediate attention. Among the various alarms, Error Code A910 stands out as particularly “exclusive” due to its specific cause: it is a hardware-exclusive alarm related to the drive’s charging circuit.

The "Exclusive" Nuance

Unlike a standard "CALL" or "BUS" error, A910 implies the drive sees the operator physically connected, but the data frame from the operator is corrupt or the timing is off by microseconds. It is an exclusive club of faults that straddle the line between "loose wire" and "imminent board failure."

Preventive Measures

To avoid the exclusivity of an A910 shutdown:

Exclusive Technical Cause (Why it's different from A9.80)

While A9.80 is a standard undervoltage (power loss at stop or standby), A910 is exclusive to Run-time undervoltage.

2. Corrupted Firmware in the Digital Operator (Not the Drive)

Most technicians reflash the drive. That rarely works for A910. The issue is often the operator’s own EEPROM. The JVOP-180 operators have a habit of losing their bootloader handshake string after repeated power cycles, especially if the drive is powered off via a main disconnect rather than a soft shutdown.

Yaskawa Model-Specific Exclusivity

The fix for A910 varies dramatically by drive series. Here is the exclusive breakdown:

Conclusion: Mastering the A910 Exclusive

Yaskawa error code A910 is not a death sentence for your drive. However, treating it like a simple loose connection will lead to repeated downtime and unnecessary replacements. The exclusive insights in this guide—from capacitor ripple testing to FFC wiggling and ghost firmware bugs—equip you to diagnose with surgeon-like precision.

Remember the golden rule of A910: The operator is usually a victim, not the culprit. The drive’s control board, power supply, or interconnects are the true sources 80% of the time.

By applying this long-form, exclusive troubleshooting methodology, you will reduce mean-time-to-repair (MTTR) from hours to minutes and extend the service life of your Yaskawa automation assets.

Next Steps:

For more Yaskawa error code deep-dives, subscribe to our automation maintenance series. Next up: The exclusive guide to error code “CPF-06” no one talks about.

The Yaskawa error code A.910 is a warning that signals an overload condition in a servo drive. Specifically, this code indicates that the motor or drive is operating near its capacity and is at risk of triggering a full "Overload" alarm—either A.710 (instantaneous maximum load) or A.720 (continuous maximum load). What Does the A.910 Error Mean?

Unlike a hard "Fault" that stops the motor immediately, A.910 is technically a warning. It serves as a preemptive notification that the current load on the servomotor is exceeding normal operating parameters. If the condition causing the overload is not addressed, the drive will eventually shut down with a hard fault to protect the hardware from permanent damage. Common Causes of the A.910 Warning

Mechanical Overload: The most common cause is a physical bind or excessive weight/friction in the machine’s mechanics that forces the motor to draw more current than its rated limit.

Rapid Acceleration/Deceleration: Extremely aggressive speed changes can cause current spikes that trigger the overload warning.

Drive/Motor Capacity Mismatch: If the SERVOPACK capacity is significantly lower than the servomotor it is trying to drive, the system may struggle to maintain the required torque.

Incorrect Parameter Settings: Errors in parameters related to torque limits or current levels can cause the drive to report an overload prematurely. Troubleshooting and Solutions

To resolve the A.910 error and prevent it from becoming a critical A.710 or A.720 fault, follow these steps:

Inspect Mechanical Components: Check for any obstructions, broken bearings, or lack of lubrication in the system that could be increasing mechanical resistance.

Review Motion Profiles: If the warning occurs during specific movements, try reducing the acceleration or deceleration rates in the host controller or drive parameters. yaskawa error code a910 exclusive

Check Parameter Settings: Verify that parameters such as Pn520 (Position Error Pulse Overflow) or others related to motor current are set correctly for your specific application.

Verify Sizing: Ensure the motor and SERVOPACK are properly matched. Yaskawa generally recommends a capacity ratio between 1/4 and 4 for stable operation.

Monitor with Software: Use Yaskawa’s SigmaWin+ software to monitor real-time torque and current usage to pinpoint exactly when the overload occurs.

Yaskawa Servopack Fault Codes Guide | PDF | Power Supply - Scribd

Yaskawa Error Code A.910 Overload Warning typically found on Yaskawa Sigma-7 (and occasionally Sigma-5) servo drives. Unlike hard faults that immediately shut down the system, this code acts as an early warning alert. It notifies operators that the motor has been operating continuously at a torque level exceeding its rating, putting it on the verge of a critical overload trip (such as an A.710 or A.720 overload alarm).

Resolving this code promptly is essential to avoid forced machine downtime. This feature guide breaks down the causes, diagnostic steps, and remedies for the A.910 error. 🔍 Quick Reference: A.910 Overview Alarm Name Overload Warning Yaskawa Sigma-5 / Sigma-7 Series SERVOPACKs Primary Meaning

The motor is operating dangerously close to its thermal or torque limits. System Behavior

The drive will generally continue running but issues a warning. If unaddressed, it will escalate to a full shutdown alarm. ⚠️ Top 5 Causes of Error A.910

The A.910 warning is triggered by one of these common system stresses: Mechanical Binding or Jamming:

Debris, lack of lubrication, or worn-out bearings create physical resistance, forcing the motor to draw more torque than necessary. Exceeded Operation Profiles:

High-cycle rates, overly aggressive acceleration/deceleration curves, or continuous peak-torque demands that exceed the motor's rated capacity. Incorrect Parameter Thresholds: The overload warning level parameter (

) is set too low or inappropriately for the specific application. Wiring or Contact Faults:

Poor physical connections or damaged encoder/power cables providing inconsistent feedback or power drops. Hardware Failure: Internal damage within the SERVOPACK itself. 🛠️ Step-by-Step Diagnostic & Remedy Feature

When an A.910 code appears on your digital operator, follow this sequential troubleshooting pipeline: 1. Inspect the Mechanical System

Check the machinery driven by the servomotor for physical obstructions, misalignments, or excessive friction.

Clear any jams, realign mechanical actuators, and lubricate guide rails or gearboxes to minimize drag. 2. Evaluate Operating Conditions

Review the motion profile (speed, acceleration, and duty cycle) at the host controller.

If the motor is running at peak torque for too long, reduce the acceleration rates, lengthen the cycle times, or decrease the overall payload. If the load cannot be reduced, consider upgrading to a motor with a higher capacity. 3. Adjust Parameter Pn52B (Overload Warning Level) Check the value of parameter

, which dictates at what percentage of the rated load the A.910 warning triggers. Install line reactors or AC input chokes to

If the load is safely within the continuous capability of the motor but simply riding high, adjust to a more suitable threshold to prevent nuisance warnings. 4. Verify Wiring and Connections

Inspect the main circuit power cables and the encoder cables linking the motor to the SERVOPACK.

Ensure all terminals are tightly secured and free of corrosion. Look for cracked or frayed shielding on cables that could be inducing electronic noise. 5. Address Potential SERVOPACK Failure

If mechanical loads are verified as normal and parameters are correct but the code persists.

The current detection or internal logic of the drive may be failing. Replace the SERVOPACK unit. 🛡️ Best Practices to Prevent A.910

To stop Overload Warnings from disrupting your facility's operations, implement these preventive habits: Perform Regular Audits:

Routinely monitor the drive's actual torque output using Yaskawa's

software to see how close the baseline operations are to the rated capacity. Scheduled Lubrication:

Keep automated tracks, ball screws, and bearings lubricated to ensure the motor does not overwork to combat dry friction. Enclosure Cooling:

Ensure your control cabinets have active cooling or filtered ventilation; high ambient heat lowers a servo drive's effective capacity. 6.3 Drive Alarms, Faults, and Errors

Troubleshooting Yaskawa Error Code A.910: A Comprehensive Guide Yaskawa A.910 error code , specifically associated with the Sigma-7 series servo drives Overload Warning

. Unlike critical "faults" that immediately shut down the system, this is an alarm indicating the motor is operating near its capacity limit and is at risk of a full overload trip (A.710 or A.720). Understanding the A.910 Alarm

This alarm serves as a proactive signal. When your drive displays A.910, it means the current load or operating conditions are pushing the servomotor toward its thermal protection threshold. Primary Causes & Diagnostic Steps

To resolve the A.910 code, inspect these five common triggers identified in Click2Electro's Sigma 7 Guide Mechanical Load Issues

: The most common culprit is excessive physical load. Check the motor and connected machinery for physical obstructions, worn parts, or misalignment. Wiring and Contact Faults

: Incorrect or loose wiring between the servomotor and the encoder can trigger false warnings or legitimate performance drops. Operating Condition Violations

: Rapid acceleration/deceleration cycles or continuous high-torque operation can exceed the drive's overload protection characteristics. Parameter Configuration Overload Warning Level (Pn52B)

is set too low for your specific application, the drive will trigger A.910 prematurely. Hardware Failure : In rare cases, internal failure within the

itself may lead to incorrect current sensing and false alarms. Effective Remedies to Clear A.910 Follow these steps to restore normal operation: Inspect Mechanics Exclusive Technical Cause (Why it's different from A9

: Verify that the load is within the motor's rated capacity and that there are no mechanical jams. Check Wiring

: Ensure all connections for the servomotor and encoder are secure and correctly mapped according to the Yaskawa Sigma-7 manual Adjust Parameters : Check parameter

. If your process naturally requires high loads, ensure this setting is appropriate for your workload without compromising safety. Evaluate Motor Capacity

: If the alarm persists during standard operation, you may need to increase the motor capacity to handle the specific application requirements. Replace SERVOPACK

: If the hardware is identified as faulty after all other checks, the unit may need professional repair or replacement.

: You can often find additional details on current alarms by checking the seven-segment display on the front of the drive or using the software for a more detailed diagnostic readout. or a list of compatible Sigma-7 motor upgrades A.910 fault in Yaskawa Sigma 7 servo drive - Click2Electro

In Yaskawa servo drive systems, the code is classified as an Overload Warning

. Unlike a hard fault, a warning indicates that the system is approaching an operational limit but has not yet tripped a protective shutdown. Understanding the A.910 Warning

The A.910 warning specifically serves as a "pre-alarm" for more severe overload conditions. It is designed to alert operators before the drive triggers the following fatal alarms: : Overload – High Load. : Overload – Low Load. Yaskawa America

If the conditions causing A.910 are ignored and operation continues, the drive will eventually shut down with one of the above errors to protect the motor and internal circuitry. Common Causes Excessive Load

: The torque required by the application is consistently exceeding the motor's rated capacity. High Ambient Temperature : If the environment around the motor or drive exceeds

), the system's ability to dissipate heat is reduced, leading to premature overload detection. Mechanical Issues

: Increased friction in the mechanical system—such as worn bearings, jammed gears, or lack of lubrication—forces the motor to work harder than normal. Incorrect Gain Settings

: Aggressive servo gain settings can cause the motor to "hunt" or vibrate, drawing excessive current and triggering an overload warning. MachMotion Troubleshooting and Solutions Check Load Ratios : Use the monitor function (typically

for accumulated load ratio) to verify the actual percentage of the motor's capacity being used. If it is consistently near or above 100%, the application may require a larger motor or a change in duty cycle. Verify Environment

: Ensure that the cooling fans on the drive are functional and that there is adequate ventilation in the control cabinet. Inspect Mechanics

: Disconnect the motor from the load and check if the mechanical components move freely by hand. Tune the Servo : If vibration is present, use the Yaskawa SigmaWin+ software

to perform autotuning or manually adjust gains to stabilize the system.

For detailed technical specifications, you can refer to the official Yaskawa Sigma-5 Alarm Troubleshooting Guide MachMotion Drive Error List specific parameter settings for your drive model to adjust these warning thresholds?

Common Causes of the A910 Error

To clear the A910, one must identify which "Exclusive" condition is active. Below are the most frequent scenarios: