Yaskawa Error Code A910 Exclusive -

If your drive uses an option card (e.g., an EtherCAT or DeviceNet card) that shares the same communication bus as the operator port, a conflict in the scan cycle can trigger A910. This is exclusive to drives with firmware versions earlier than 6.0.

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.

Unlike general software or parameter-setting errors (e.g., oC, oH, or bUS errors), A910 is exclusive because:

A910 Exclusive = resource/session ownership prevents access; find and release the owning session (or safely power-cycle) after ensuring the machine is secure.

If you want, I can tailor this article for a specific Yaskawa product family (VFD, Sigma-7 servo, MPiec, or Motoman robot) or format it for a maintenance procedure document.

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

: 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 yaskawa error code a910 exclusive

. 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

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. If your drive uses an option card (e

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.

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

Yaskawa A.910 error code Overload Warning . It is not a hard "alarm" that will immediately stop your machine, but rather a final warning that you are about to trigger a full (Instantaneous Maximum Load) or (Continuous Overload) alarm. Yaskawa.eu.com You need an oscilloscope or a true-RMS multimeter

Think of it as the motor's "check engine" light specifically for physical stress. 🛠️ What is happening?

The drive has calculated that the motor is working too hard for too long. If you ignore this warning and continue operation, the drive will eventually shut down with a hard alarm to protect the motor from burning out. Yaskawa.eu.com Common Causes Mechanical Bind/Obstruction:

Something is physically stopping the motor or making it harder to turn (e.g., a jammed bearing, lack of lubrication, or a physical crash). Incorrect Wiring:

Faulty contacts or incorrect motor/encoder wiring can cause the drive to misread the load. Aggressive Duty Cycle:

The machine is being asked to move too fast, too often, or carry a load heavier than the motor’s rated capacity. Parameter Settings: The warning level might be set too low in parameter

, causing it to trigger even during normal (but heavy) operation. 【安川電機】e-メカサイト ✅ Immediate Troubleshooting Steps Monitor Cumulative Load: Check the drive's monitor mode to see the Cumulative Load Ratio

. If it is consistently over 100%, the motor is undersized or the cycle is too demanding. Test Without Load:

If possible, disconnect the motor from the machine and run it "naked." If the A.910 still appears, the issue is likely electrical (wiring or the drive itself) rather than mechanical. Check Mechanics:

Manually rotate the machine (with power off) to feel for stiff spots, grinding, or resistance. Adjust Parameters (Carefully): You can delay the A.910 warning by increasing the value in , but this

prevent the final A.710/720 alarm from happening—it just makes the warning come later. 【安川電機】e-メカサイト 📖 The "Proper Story" (What to expect) If you see powering on

the machine, it often means the drive "remembers" it was in an overload state before it was shut down and is warning you that the motor hasn't had enough time to cool down yet. 【安川電機】e-メカサイト If you are using series drives, you can specifically look at parameter

(Excessive Position Error Warning Level) if the overload seems tied to the moment the Servo turns ON. Yaskawa.eu.com If you'd like to narrow this down, could you tell me: Does the error happen immediately at power-on during a specific move of Yaskawa drive are you using (e.g., Sigma-5, Sigma-7)? Has the machine recently been serviced or crashed?

A.910が発生しました。原因を教えてください。- サーボ

---

You need an oscilloscope or a true-RMS multimeter with a bandwidth of at least 100kHz.