Comprehensive FANUC Alarm List: Understanding FANUC Fault Codes

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FANUC control systems are widely used in industrial automation, offering reliability and precision. However, like all machinery, they can encounter issues that trigger alarm code. Understanding these alarms and knowing how to troubleshoot them is essential for maintaining smooth operation. In this guide, we’ll provide an in-depth overview of FANUC alarm list, categorized by type, and offer solutions to common issues.

Introduction to FANUC Alarm Classification Overview

Categorization

Fanuc alarms can be divided into system alarms (PS, BG, SR), Servo alarms SV, Spindle alarms SP, integrated alarms DS, over-travel alarms OT, power failure alarms PW, overheating alarms OH, storage alarms IO, privilege alarms SW, security alarms IE, PMC alarms (ER, WN), hardware alarms PC, Spindle Drive alarms, spindle drive error

Why understanding these classifications is critical to troubleshooting？

For a variety of reasons, it is important to understand the classifications of FANUC alarm code for effective troubleshooting:
Quick Issue LocalizationEach category of alarms points to a particular fault type. This helps technicians pinpoint the problem quickly. System alarms, for example, are related to issues with power or background processes, while servo alerts indicate problems with motors or drivers.

  • Improved Efficiency
    Knowing the type of alarm allows technicians to focus their attention on the appropriate components. This saves time and prevents unnecessary checks.
  • Diagnose and solutions with precision
    Categorization allows for more accurate diagnosis. Spindle alarms can be related to sensor or motor malfunctions. This helps guide the repair process.
  • Safety and Reliability
    Certain alarms like safety alarms indicate potential hazards. This allows for quick responses to protect personnel and equipment.

Understanding these classifications will improve troubleshooting accuracy and speed. The FANUC Alarm Code List helps in this process, by providing a structured method of fault resolution.

Explanation of Different FANUC Alarm Codes

fanuc alarm code

FANUC alarm code can be classified into several categories based on the nature of the problem. Below are the main categories and their meanings:

1. System Alarm Code (PS, BG, SR)

  • PSxxxx: Alarms caused by program abnormalities

  • BGxxxx: Background editing alarms that occur during background system processes. Often related to memory and hardware.

  • SRxxxx: Communication-related alarms, typically due to lost signals or communication faults.

2. Servo Alarm Code (SV)

  • SVxxxx: Alarms relating to the servo systems, possibly involving servo drivers, encoders or motors.

3. Spindle Alarm Code (SP)

  • SPxxxx: Alarms relating to spindle drive failures. Typically, these alarms are related to motors, sensors, or drivers.

4. Comprehensive Alarm Code (DS)

  • DSxxxx: Other alarms are usually caused by system failures involving multiple subsystems.

5. Overtravel Alarm Code (OT)

  • OTxxxx: Overtravel alarms that occur when encoders or mechanical limits malfunction.

6. Power Failure Alarm Code (PW)

  • PWxxxx: Alarms for power cut-off, typically due to voltage fluctuations or interruptions.

7. Overheat Alarm Code (OH)

  • OHxxxx: Overheating alarms caused by inadequate cooling or high-load operation.

8. Storage Alarm Code (IO)

  • IOxxxx: Alarms related storage file issues. This could be a memory or storage device issue.

9. Permission Alarm Code (SW)

  • SWxxxx: Alarms triggered by parameter write-states. Usually due to restricted or insufficient permissions.

10. Safety Alarm Code (IE)

  • IExxxx: Malfunction prevention alerts, usually associated with safety devices or automatic emergency stop systems.

11. PMC Alarm Code (ER, WN)

  • ERxxxx: PMC controller alarms caused by faults and parameter errors.

  • WNxxxx: PMC warnings, which indicate potential problems in the PMC programme without causing a complete failure.

12. Hardware Alarm Code (PC)

  • PCxxxx: Hardware failure alarms caused by damaged circuit board or hardware connections issues.

13. Spindle Drive Alarm Code

  • Spindle-related failures may be caused by faults in the motor, driver or other equipment.

14. Spindle Drive Error Alarm Code

  • Spindle-drive-related errors are typically caused by overheating or mechanical problems, which prevent proper spindle operations.

How to Find FANUC Alarm Codes on the Equipment?

fanuc alarm code
fanuc alarm code

To find FANUC alarm codes on your equipment, you need to check two main areas:

  • System Alarms (PS, BG, SR, etc.) These alarms are displayed directly on the system display screen. When a system error occurs, a specific alarm code is displayed indicating the type of fault.
  • Drive Alarms: Alarms related to the Drive are displayed on the digital tube of the Drive unit in addition to the system display screen. These codes provide quick feedback on Motor or Drive problems.

Understanding where each type of alarm is displayed will help technicians quickly pinpoint the area that has a problem. The FANUC Alarm List can be used to identify and resolve these issues quickly. Refer to the FANUC Alarm Code List manual for codes and their meanings.

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Preventing FANUC Alarms

To minimize the occurrence of FANUC alarm codes, regular maintenance and preventive measures are essential:

  • Perform routine checks and cleaning of components.
  • Backup programs and parameters regularly.
  • Upgrade software to ensure compatibility and optimal performance.

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Downloadable FANUC Alarm List and How to Read It

We’ve provided a downloadable FANUC alarm list in the attachment, designed to help you quickly identify and troubleshoot alarm codes. The list includes commonly used alarm numbers categorized by their type. For example:

  • PS (Power Supply) Alarm Code: PS0003
  • BG (Background) Alarm Code: BG0085
  • SR (Servo Ready) Alarm Code: SR0001

Each alarm code is displayed with its status to help you understand the issue at a glance. Simply download the FANUC alarm list manual to access the full list and use it for efficient fault diagnosis and repair.
Click here to download the FANUC Alarm List

Understanding and referencing this alarm list will streamline your troubleshooting process and help ensure minimal downtime.

Conclusion

In this article, we discussed the classification and meaning of FANUC alarm codes, and how to find the different alarms displayed on the digital panel and display.

Download FANUC Alarm Code List Manual and check your equipment regularly to respond quickly to alarms.

FANUC Alarm List

Next Issue Preview:
In the next article of this series, we will dive deep into the System Alarm Code (PS, BG, SR) category, explaining the common causes, symptoms, and how to effectively troubleshoot each alarm code. Stay tuned for more detailed insights!

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Step 1: Contact Us:

Get in touch with us and provide as much detail as possible about the issue you are experiencing.

Our professional repair team will help assess the severity of the problem and the possibility of repair.

  • If the fault is likely repairable, we will provide an initial quote and arrange for logistics to collect the item.
  • If the fault is difficult to repair, we will suggest replacing the parts and offer a special discount quote for your reference.

The customer sends or delivers the servo drive to our company. We register it in our system and prepare it for further inspection.

Our engineers diagnose the fault points of the servo drive and provide a detailed inspection report, including the final repair cost and estimated repair time.

We provide the repair quote to the customer and wait for their confirmation. If the customer agrees to the quote, we proceed with the repair. 

Upon customer approval, we carry out the necessary repairs. After repairs are completed, we perform tests with the motor and conduct aging tests to ensure the servo drive operates reliably under various conditions. Once the testing is successful, we register the drive for delivery.

The customer completes the payment, and we deliver the repaired servo drive to the customer.

We provide attentive follow-up service to ensure customer satisfaction and address any further needs.

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