What Are Fanuc Robot Error Codes?

Fanuc robot error codes are diagnostic messages that indicate a problem with the robot's operation. These codes help technicians and operators identify and troubleshoot issues quickly and effectively. Every operator should recognize and understand a wide variety of error codes should they appear.

An error code consists of:

• The facility name and error code number

• The severity of the error

• The message text of the error

Where can I find a detailed list of Alarms?

The Alarm Log screen displays a list of errors that have occurred. There are two ways to display alarms.

• Automatically using the Active Alarm screen. This screen displays only active errors (with a severity other than WARN) that have occurred since the last time RESET was pressed.
• Manually using the History Alarm screen. This screen displays up to the last 100 alarms, regardless of their severity.

Display Active Alarms Automatically:

• Set the system variable $ER_AUTO_ENB to TRUE either on the SYSTEM Variables menu or by setting Auto display of alarm menu to TRUE on the SYSTEM Configuration menu.
• Then perform a Cold start.
• The following screen will automatically be displayed. It lists all errors with a severity other than WARN, that have occurred since the last controller RESET. The most recent error is number 1.

Displaying The alarm Log Manually:

1. Press MENU.

2. Press ALARM.

3. Press F3, HIST.

4. Press F1, [TYPE].

5. Select Alarm Log. The alarm log will be displayed. This lists all errors. See the following screen for an example

Common Fanuc Error Codes and Their Meanings

Let's explore some of the most frequently encountered error codes in Fanuc robots:

SRVO-021: SRDY Off Alarm

Meaning: This error indicates that the servo-ready signal is off.

Cause: The primary reason can be an issue with the Fanuc servo amplifier, a problem with the servo motor, or a malfunction in the controller.

Solution:

1. Check the connections between the servo amplifier and the motor.
2. Inspect the servo amplifier for any signs of damage or overheating.
3. Verify the controller settings and ensure there are no configuration errors.

SRVO-023: SERVO Alarm

Meaning: This error occurs when there is a servo alarm condition, often related to the servo amplifier or motor.

Cause: Common causes include overload, over-temperature, or a hardware fault in the servo amplifier.

Solution:

1. Reduce the load on the servo motor.
2. Check for adequate cooling and ventilation.
3. Replace the faulty servo amplifier if necessary.

INTP-311: Teach Pendant E-Stop

Meaning: This error signifies that the emergency stop button on the teach pendant has been pressed.

Cause: Accidental activation of the emergency stop or a fault in the teach pendant.

Solution:

1. Reset the emergency stop button on the teach pendant.
2. Inspect the teach pendant for any physical damage or faults.
3. Replace the teach pendant if it is defective.

MOTN-017: In Position Error

Meaning: This error indicates that the robot did not reach the expected position within a specified time.

Cause: Possible causes include mechanical obstructions, incorrect motion parameters, or issues with the servo motor.

Solution:

1. Remove any mechanical obstructions from the robot's path.
2. Verify and adjust the motion parameters.
3. Inspect the servo motor for any issues and replace it if necessary.

SYST-005: System Software Mismatch

Meaning: This error occurs when there is a mismatch in the system software versions.

Cause: It typically happens after a software update or during system initialization.

Solution:

1. Ensure all system components have compatible software versions.
2. Reinstall the software if necessary.
3. Contact Fanuc support for assistance with software compatibility issues.

Troubleshooting Tips for Fanuc Robots

To effectively troubleshoot Fanuc robot errors, follow these general tips:

1. Consult the Manual: The Fanuc robot manual provides detailed information about error codes and troubleshooting steps. Always refer to the manual specific to your robot model.
2. Use Diagnostic Tools: Fanuc robots come with diagnostic tools that can help identify the source of an error. Use these tools to gain more insight into the problem.
3. Perform Regular Maintenance: This can prevent many common errors. Ensure all components are in good working condition and promptly replace worn-out parts.
4. Check Connections: Loose or faulty connections can cause a range of issues. Regularly inspect and secure all electrical connections.
5. Stay Updated: Keep your robot's software and firmware up to date. Software updates often include bug fixes and improvements that can resolve known issues.

All Fanuc robot models use the same set of error codes and specific troubleshooting steps. Here are some of the most common alarms you might encounter among the many specific types of Fanuc Robots:

Fanuc M-10iA

• Error Code: SRVO-075: Pulse Mismatch
  • Meaning: This error indicates a mismatch in the pulse encoder feedback.
  • Solution: Check the pulse coder cable connections and replace the pulse coder if necessary.

Fanuc LR Mate 200iD

• Error Code: SRVO-068: Disturbance Excess
  • Meaning: The disturbance level on the servo motor is too high.
  • Solution: Reduce the load on the servo motor and ensure proper lubrication of the mechanical parts.

Fanuc R-2000iC

• Error Code: SRVO-053: Overcurrent Alarm
  • Meaning: This error occurs when the servo amplifier has an overcurrent condition.
  • Solution: Inspect the servo amplifier for signs of damage and check for short circuits in the motor cables.

Understanding and troubleshooting Fanuc robot error codes is essential for maintaining the efficiency and safety of your manufacturing operations. By familiarizing yourself with these common error codes and their solutions, you can minimize downtime and keep your Fanuc robots running smoothly. Regular maintenance, timely updates, and thorough inspections are vital to preventing and resolving errors.

If your error codes reveal a need for robot equipment replacement, look no further than T.I.E. Industrial, a leading supplier specializing in high-quality refurbished Fanuc robotic parts. Whether you need a replacement servo amplifier or a new teach pendant, we have you covered. Contact T.I.E. Industrial today to learn more about our products and services.