Yaskawa Error Code A910 Link -

Understanding the Yaskawa A.910 Error Code: Causes and Solutions

The Yaskawa A.910 error code is a common overload warning primarily associated with Sigma-series servo drives, such as the Sigma-7 and Sigma-3. Unlike a critical "fault" that stops the motor immediately, this code acts as an alarm or minor fault, signaling that the system is approaching its operational limits.

If left unaddressed, an A.910 alarm typically escalates into a full-system shutdown (such as an A.710 or A.720 overload fault) to prevent hardware damage. What Does Error A.910 Mean?

In technical terms, A.910 indicates that the drive has detected an overload condition where the load on the motor is nearing its maximum rated capacity.

Warning Nature: It is a pre-alarm designed to give operators a chance to adjust the process before a complete trip occurs.

Trigger Point: The alarm is triggered based on the Overload Warning Level (Pn52B) parameter setting. If the motor operates at a torque exceeding its rating for several seconds, the drive flags this code. Primary Causes of the A.910 Alarm

Several factors—ranging from mechanical issues to electrical wiring—can trigger this warning:

Mechanical Overload: The most frequent cause is a physical obstruction or excessive load on the motor that exceeds its torque specifications.

Incorrect Wiring: Faulty contact or incorrect wiring in either the servomotor or encoder cables can cause the drive to misread the load or lose efficiency.

Parameter Settings: If the Overload Warning Level (Pn52B) is set too low for the specific application, the alarm will trigger prematurely.

Environmental Factors: High temperatures inside the SERVOPACK panel (exceeding 55°C) can reduce performance and trigger overload warnings.

Hardware Failure: In some cases, an internal fault within the SERVOPACK unit itself may cause erroneous A.910 readings. Step-by-Step Troubleshooting and Remedies

To resolve an A.910 error and prevent a full system trip, follow these steps:

Check Mechanical Load: Inspect the machinery for jams, excessive friction, or unexpected weight. Ensure the motor capacity is correctly sized for the operation.

Verify Wiring: Inspect all connections between the drive, motor, and encoder. Tighten loose terminals and replace damaged cables.

Adjust Parameters: Verify the setting of parameter Pn52B. If the application requires higher temporary torque, consider increasing this warning threshold within safe limits.

Monitor Temperature: Ensure the control panel has adequate ventilation. You may need to install cooling fans or an air conditioner if the internal temperature exceeds 55°C.

Reset the Drive: Once the physical cause is removed, use the digital operator or SigmaWin+ software to clear the alarm. If the code persists after a power cycle, the SERVOPACK may require replacement.

For complex issues or persistent alarms that cannot be cleared, it is recommended to contact a certified repair center like Precision Zone for a full diagnostic. Yaskawa Servo Drive Alarm Codes Guide | PDF - Scribd

The Yaskawa error code A910 indicates a "Communications error (serial communications)" — specifically a transmission data fault between the drive and the keypad, optional digital operator, or serial communication link.

Key info for “A910 link”:

• Cause:
  The serial communications link has failed or is intermittent. This often happens with the RS-422/RS-485 connection to a remote keypad (like a JVOP-180) or a host controller (PLC, HMI). yaskawa error code a910 link

• Common scenarios:

  • Loose or broken wiring on terminals R+, R-, S+, S- (for MEMOBUS/Modbus).
  • Noise interference on the communication line.
  • Wrong communication parameter settings (e.g., baud rate, parity, slave address mismatch).
  • Using an incompatible operator or cable.
  • Damaged drive communication port.

• Troubleshooting steps for the link:

  1. Power cycle the drive – transient faults may clear.
  2. Check wiring – ensure twisted-pair shielded cable is used, shield grounded only at one end.
  3. Verify termination resistors – set correctly for the network.
  4. Test with a local keypad (directly mounted on drive) – if A910 clears, the link/cable/remote device is the problem.
  5. Reduce electrical noise – separate comm lines from power cables, use ferrite cores.
  6. Check settings – o1-05 (LCD contrast not related), but focus on F6-xx (for digital operator), H5-xx (for serial comm). Ensure parity, stop bits, baud rate match all devices.
  7. Replace cable – if damaged.

• If fault persists:
  The drive’s serial port may be damaged, requiring drive repair/replacement.

For a precise solution, note your Yaskawa drive model (e.g., GA800, GA500, U1000, V1000, A1000, J1000) – A910 behavior is nearly identical across modern Yaskawa AC drives, but terminal locations and parameter numbers can vary slightly.

Would you like the exact parameters to check for your specific model?

The Yaskawa error code A.910 is an Overload Warning that appears on Sigma-series SERVOPACKs (such as the Go to product viewer dialog for this item. and Go to product viewer dialog for this item.

). It serves as a preventative alert, triggering before a critical overload alarm (A.710 or A.720) occurs to protect the motor and drive from damage. Key Technical Details

Purpose: Notifies the operator that the servomotor is operating under a torque that exceeds its ratings for a sustained period.

Threshold: By default, it is detected at 20% of the time required to trigger a full overload alarm. This timing can be adjusted by modifying parameter Pn52B.

Behavior: If ignored, the warning typically escalates to a full "Overload" alarm (A.710 for high load or A.720 for low load), which will stop motor operation. Common Causes & Troubleshooting

The A.910 code is usually tied to electrical or mechanical stress rather than a permanent hardware failure.

Wiring Errors: Incorrect wiring or faulty contacts in the servomotor or encoder cables can cause erratic current readings.

Fix: Inspect all connections and ensure the encoder is properly grounded.

Mechanical Load: The load exceeds the motor's starting or continuous torque capacity, often due to mechanical binding or high inertia.

Fix: Check for mechanical blockages or reconsider the operating duty cycle.

Environment & Cooling: High temperatures inside the SERVOPACK panel (exceeding 55∘C55 raised to the composed with power C

) or restricted air circulation can lead to premature overload detection. Fix: Improve panel cooling or reduce the carrier frequency.

Parameter Settings: The overload warning level (Pn52B) might be set too low for the specific application.

Fix: Set a suitable warning level via the Yaskawa Sigma-7 manual guidelines. Advanced Diagnostics A.910 fault in Yaskawa Sigma 7 servo drive - Click2Electro

The Yaskawa error code A.910 is an Overload Warning (pre-alarm) primarily found in Sigma-series servo drives (Sigma-3, Sigma-5, and Sigma-7). It serves as a precursor to more severe faults like A.710 (instantaneous overload) or A.720 (continuous overload).  Error Summary 

Definition: The drive has detected that the motor is approaching its overload protection limit. Understanding the Yaskawa A

Behavior: In many configurations, the drive will continue to run while the alarm flashes, but it will trip (stop) if the load is not reduced.  Common Causes & Troubleshooting  Potential Cause  Recommended Action Excessive Mechanical Load

Check for mechanical jams, binding, or friction in the system. Incorrect Wiring

Inspect the servomotor and encoder wiring for loose contacts or incorrect phases. Tight Duty Cycle

The operation pattern (acceleration/deceleration) may exceed the motor’s rated capacity. Parameter Settings

Check Pn52B (Overload Warning Level). If set too low, it triggers the warning prematurely. Environmental Heat

High temperatures inside the SERVOPACK panel (above 55°C) can trigger thermal-related warnings. Hardware Failure

If the load is normal and wiring is secure, the internal current detection circuit in the SERVOPACK may be faulty. Recommended Tools 

SigmaWin+: Use this software to monitor the accumulated load ratio (Un009) and view the alarm trace to see exactly when the overload occurs.

Yaskawa Manuals: Refer to the specific troubleshooting manual for your drive series (e.g., Sigma-7 Troubleshooting Manual) for detailed parameter lists.  To help you further, could you let me know:  Which drive series are you using (e.g., Sigma-7, Sigma-5)?

Is this happening during startup or while the machine is running?

Have there been any recent mechanical changes to the machine?  Σ-7C SERVOPACK - Troubleshooting Manual

Understanding and Troubleshooting Yaskawa Error Code A910 Link Issues

Yaskawa is a renowned Japanese manufacturer of industrial automation products, including variable frequency drives (VFDs), servo drives, and robots. Their products are widely used in various industries, such as manufacturing, automotive, and food processing. However, like any complex electronic device, Yaskawa products can sometimes encounter errors, which can disrupt production and cause significant downtime. One common error code that users may encounter is the A910 link error.

In this article, we will provide an in-depth analysis of the Yaskawa error code A910 link, its causes, symptoms, and troubleshooting steps. We will also offer preventive measures to minimize the occurrence of this error and provide guidance on when to seek professional help.

What is Yaskawa Error Code A910 Link?

The A910 link error is a specific fault code displayed on Yaskawa drives, particularly on their VFDs and servo drives. This error code indicates a communication link error between the drive and the controller or other devices connected to the network.

Causes of Yaskawa Error Code A910 Link

Several factors can contribute to the A910 link error:

1. Communication cable issues: Faulty, damaged, or improperly connected communication cables can disrupt the link between devices.
2. Network configuration errors: Incorrect network settings, such as IP addresses, subnet masks, or baud rates, can prevent devices from communicating with each other.
3. Controller or drive configuration: Misconfigured controller or drive settings can lead to communication errors.
4. Device compatibility issues: Incompatibility between devices from different manufacturers or with different communication protocols can cause link errors.
5. Noise and electrical interference: Electromagnetic interference (EMI) or radio-frequency interference (RFI) can affect communication signals and cause errors.
6. Firmware or software issues: Outdated or corrupted firmware or software can lead to communication problems.

Symptoms of Yaskawa Error Code A910 Link

When the A910 link error occurs, you may notice the following symptoms:

• The drive or controller displays the A910 error code.
• Communication between devices is lost, and data transmission is interrupted.
• The system may experience erratic behavior, such as unexpected stops or incorrect operation.
• Alarms or warnings may be triggered, indicating a communication error.

Troubleshooting Yaskawa Error Code A910 Link Cause: The serial communications link has failed or

To resolve the A910 link error, follow these step-by-step troubleshooting procedures:

1. Check communication cables: Verify that all communication cables are securely connected, not damaged, and meet the required specifications.
2. Verify network configuration: Ensure that network settings, such as IP addresses and baud rates, are correctly configured for all devices on the network.
3. Check controller and drive settings: Review controller and drive settings to ensure they are compatible and properly configured for communication.
4. Test device compatibility: Verify that all devices on the network are compatible with each other and support the same communication protocol.
5. Minimize noise and electrical interference: Ensure that all devices are properly grounded, and consider using noise-reducing filters or shielding.
6. Update firmware and software: Check for firmware or software updates and install the latest versions to ensure compatibility and resolve known issues.

Preventive Measures to Minimize A910 Link Errors

To reduce the occurrence of A910 link errors, consider the following preventive measures:

1. Regularly inspect and maintain communication cables: Check cables for damage or wear and replace them as needed.
2. Verify network configuration: Periodically review network settings to ensure they are correct and up-to-date.
3. Monitor system performance: Regularly check system performance and adjust settings as needed to prevent errors.
4. Use high-quality devices and components: Choose devices and components from reputable manufacturers to ensure compatibility and reliability.
5. Keep firmware and software up-to-date: Regularly update firmware and software to ensure you have the latest features and bug fixes.

When to Seek Professional Help

If you are unable to resolve the A910 link error using the troubleshooting steps provided, it may be time to seek professional help. Consider contacting:

1. Yaskawa support: Reach out to Yaskawa's technical support team for guidance on troubleshooting and repair.
2. Authorized service providers: Contact authorized Yaskawa service providers for professional repair or maintenance services.
3. Control system integrators: Consult with control system integrators who have experience with Yaskawa products and communication networks.

In conclusion, the Yaskawa error code A910 link can be a challenging issue to resolve, but by understanding its causes, symptoms, and troubleshooting procedures, you can minimize downtime and ensure smooth operation of your industrial automation system. By following preventive measures and seeking professional help when needed, you can reduce the occurrence of A910 link errors and ensure reliable communication between devices.

The Yaskawa error code Overload Warning . It serves as a precursor to more severe overload alarms like A.710 (High Load) or A.720 (Low Load). If this warning is ignored, the drive will eventually trigger a hard fault and stop the motor. Common Causes Mechanical Stress

: Excessive load on the motor due to mechanical friction or a physical obstruction. Operating Conditions

: The cycle time or load exceeds the motor's rated capacity. Wiring Issues

: Incorrect or loose contact in the servomotor or encoder wiring. Environmental Factors

: High ambient temperature within the SERVOPACK panel (exceeding 55°C). Parameter Settings : The overload warning level ( ) is set too low for the current application. Recommended Troubleshooting Steps Inspect Mechanics

: Check for any mechanical issues causing excessive torque or friction. Verify Wiring

: Ensure all cables between the motor, encoder, and SERVOPACK are securely connected and free of damage. Adjust Parameters : Review the

parameter to ensure the overload warning level is appropriate for your operating conditions. Evaluate Capacity

: If the load is consistently high, consider reducing the operation intensity or upgrading to a higher-capacity motor. Check Cooling

: Verify that the panel cooling fans are functional and that the internal temperature is within specified limits.

If these steps do not clear the warning, it may indicate an internal failure within the specific parameter adjustment steps for a particular Yaskawa series like Sigma-5 or Sigma-7? 6.3 Drive Alarms, Faults, and Errors

Step 3: Inspect the Motor and Environment

• Check if the motor surface is physically hot.
• Listen for bearing noise (mechanical friction).
• Ensure the motor cooling fan is spinning freely.

Step 1: Read the Sub-Error (Critical)

The A910 alarm has a sub-code that tells you why the link failed. To access it:

1. Press the MENU button until you reach Alarm History.
2. Scroll to the A910 event.
3. Press DATA to view the sub-error.

Common sub-codes:

• A910-01: Option card not physically present (detected empty slot).
• A910-02: Option card detected but handshake timeout.
• A910-03: Power supply failure to the option slot.
• A910-04: Option card returned corrupted ID data.

Step 6: Update Drive Firmware (Advanced)

Older firmware versions had a bug where A910 would appear after a power cycle if the option card was running the latest firmware. Connect Yaskawa’s DriveWizard software and check for updates. Go to Drive → Maintenance → Firmware Update.

Executive Summary

Error Code: A910
Official Description: Overspeed (at Start)
Severity: Medium to High (Prevents operation but typically indicates a configuration or hardware mismatch).
Category: Speed Control / Feedback Loop

In simple terms, this error occurs when the Yaskawa VFD (Variable Frequency Drive) attempts to start the motor, but the speed sensor (Encoder or PG) detects that the motor is already moving—or moving backward—faster than the allowable threshold. It can also happen if the drive commands a stop, but the motor drifts due to external forces.