we’ll explore 20 common mitsubishi servo drive alarm list, offering insights into their meanings and potential solutions. Whether you’re a seasoned engineer or a newcomer to Mitsubishi servo systems, this compilation aims to serve as a valuable reference for troubleshooting and maintaining these critical components in your automation setup. Let’s delve into the world of mitsubishi servo drive alarm list and equip ourselves with the knowledge needed to keep systems running smoothly.
Mitsubishi servo drive alarm list table
| Alarm Code | Description |
| AL.01 | Overcurrent Alarm – Indicates abnormal current surge. |
| AL.02 | Excess Speed Alarm – Triggers on unsafe speed levels. |
| AL.03 | Encoder Fault Alarm – Indicates issues with the encoder. |
| AL.04 | Overspeed Alarm – Signals potential speed instability. |
| AL.05 | Overvoltage Alarm – Indicates a surge in voltage levels. |
| AL.06 | Undervoltage Alarm – Triggers on low voltage conditions. |
| AL.07 | Overheat Alarm – Indicates excessive temperature. |
| AL.08 | Overspeed Detection Alarm – Detects speed irregularities. |
| AL.09 | DC Bus Overvoltage Alarm – Alerts on high DC bus voltage. |
| AL.10 | DC Bus Undervoltage Alarm – Indicates low DC bus voltage. |
| AL.11 | Regeneration Circuit Fault Alarm – Signals issues in the regeneration circuit. |
| AL.12 | Position Deviation Alarm – Alerts on position inaccuracies. |
| AL.13 | Load Detection Alarm – Indicates problems in load detection. |
| AL.14 | Speed Deviation Alarm – Alerts on speed deviations. |
| AL.15 | Speed Jump Alarm – Detects abrupt speed changes. |
| AL.16 | Communication Error Alarm – Indicates communication issues. |
| AL.17 | Analog Input Fault Alarm – Alerts on issues with analog input. |
| AL.18 | Serial Communication Error Alarm – Detects serial communication issues. |
| AL.19 | Non-volatile Memory Error Alarm – Signals issues in non-volatile memory. |
| AL.20 | Current Detection Circuit Fault Alarm – Alerts on faults in current detection circuit. |
Mitsubishi Servo Drive Alarms List In detail Explanation
AL.01: Overcurrent Alarm
Description:
The AL.01 Overcurrent Alarm is triggered when the servo drive detects an abnormal surge in current, indicating a potential issue in the motor or wiring.
Possible Causes and Solutions:
- Motor Issues: Check for motor problems like short circuits or issues with windings.
- Wiring Problems: Inspect the wiring for damage or faults.
- Mechanical Overload: Review the mechanical load on the system; adjust if necessary.
AL.02: Excess Speed Alarm
Description:
The AL.02 Excess Speed Alarm is activated when the servo drive detects unsafe speed levels, which could compromise system stability.
Possible Causes and Solutions:
- Speed Settings: Review and adjust speed settings to adhere to safety limits.
- Mechanical Components: Inspect mechanical components for wear or irregularities.
- System Configuration: Ensure the system is configured correctly for the intended speed.
AL.03: Encoder Fault Alarm
Description:
The AL.03 Encoder Fault Alarm indicates issues with the encoder, a critical component for position feedback in the servo drive system.
Possible Causes and Solutions:
- Encoder Damage: Check the encoder for physical damage or malfunctions.
- Wiring Issues: Inspect the wiring connected to the encoder for faults.
- Position Feedback: Verify that the encoder is providing accurate position feedback.
AL.04: Overspeed Alarm
Description:
The AL.04 Overspeed Alarm is triggered when the servo drive detects potential instability in the system due to overspeed conditions.
Possible Causes and Solutions:
- Speed Settings: Review and adjust speed settings to prevent overspeed.
- Mechanical Load: Evaluate the mechanical load on the system for balance.
- System Configuration: Ensure the system is configured to handle speed variations.
AL.05: Overvoltage Alarm
Description:
The AL.05 Overvoltage Alarm occurs when there is a surge in voltage levels, which can potentially lead to damage to the servo drive.
Possible Causes and Solutions:
- Stable Power Supply: Check for a stable and regulated power supply.
- Voltage Protection Systems: Verify and adjust overvoltage protection settings.
- External Factors: Consider external factors that may influence voltage levels.
AL.06: Undervoltage Alarm
Description:
The AL.06 Undervoltage Alarm is triggered when the servo drive detects that the voltage supplied to it falls below the specified threshold. This can result from issues in the power supply or disruptions in the electrical system.
Possible Causes and Solutions:
- Power Supply Issues: Check the power supply for stability and potential disruptions.
- Faulty Wiring: Inspect wiring for damage or loose connections.
- External Factors: Ensure that external factors like power fluctuations or other devices aren’t affecting the power supply.
AL.07: Overheat Alarm
Description:
The AL.07 Overheat Alarm is activated when the servo drive detects an excessive temperature, signaling a potential risk of damage to the system due to overheating.
Possible Causes and Solutions:
- Poor Ventilation: Ensure proper ventilation around the servo drive to dissipate heat effectively.
- Faulty Cooling System: Check the cooling system (fan, heat sink) for proper functioning.
- Ambient Temperature: Consider the ambient temperature; extremely high temperatures may contribute to overheating.
AL.08: Overspeed Detection Alarm
Description:
The AL.08 Overspeed Detection Alarm is triggered when the servo drive identifies an irregularity in the system’s speed that exceeds the predefined limits.
Possible Causes and Solutions:
- Incorrect Speed Settings: Review and adjust the speed settings to align with system requirements.
- Mechanical Issues: Inspect mechanical components for wear or irregularities.
- Load Imbalance: Check for uneven loads that may contribute to speed irregularities.
AL.09: DC Bus Overvoltage Alarm
Description:
The AL.09 DC Bus Overvoltage Alarm occurs when the voltage on the DC bus exceeds the specified limits. This can lead to potential damage to the servo drive.
Possible Causes and Solutions:
- Regenerative Energy: Evaluate the regenerative energy dissipation mechanisms.
- Faulty Regeneration Circuit: Inspect and troubleshoot the regeneration circuit for faults.
- Overvoltage Protection Settings: Verify and adjust overvoltage protection settings.
AL.10: DC Bus Undervoltage Alarm
Description:
The AL.10 DC Bus Undervoltage Alarm is activated when the voltage on the DC bus falls below the specified threshold, indicating potential issues in the power supply.
Possible Causes and Solutions:
- Power Supply Issues: Check for stable power supply conditions.
- Faulty Wiring or Connections: Inspect wiring and connections for any issues.
- External Factors: Consider external factors affecting the power supply.
AL.11: Regeneration Circuit Fault Alarm
Description:
The AL.11 Regeneration Circuit Fault Alarm is triggered when issues are detected in the regeneration circuit. The regeneration circuit is responsible for managing the energy generated during deceleration or braking of the motor.
Possible Causes and Solutions:
- Circuit Components: Inspect components within the regeneration circuit for faults.
- Regenerative Resistor: Check the regenerative resistor for proper functioning.
- Overheating Issues: Overheating in the regeneration circuit can trigger this alarm; ensure proper cooling.
AL.12: Position Deviation Alarm
Description:
The AL.12 Position Deviation Alarm alerts users to position inaccuracies in the servo drive system. This alarm is crucial for applications where precise positioning is essential.
Possible Causes and Solutions:
- Encoder Issues: Check the encoder for faults or misalignment.
- Mechanical Wear: Inspect mechanical components for wear or backlash.
- System Calibration: Recalibrate the system to ensure accurate position feedback.
AL.13: Load Detection Alarm
Description:
The AL.13 Load Detection Alarm is triggered when issues arise in load detection. This is critical for applications where understanding and managing the load on the system is essential.
Possible Causes and Solutions:
- Load Sensor Issues: Check load sensors for faults or misalignment.
- Wiring Problems: Inspect wiring connected to load sensors.
- Load Variations: Ensure that the load on the system is within specified limits.
AL.14: Speed Deviation Alarm
Description:
The AL.14 Speed Deviation Alarm is activated when there are significant deviations from the specified speed levels. This is crucial for applications where maintaining consistent speeds is essential.
Possible Causes and Solutions:
- Speed Control System: Review and adjust the speed control system.
- Mechanical Components: Inspect mechanical components for wear or irregularities.
- Feedback System: Verify the feedback system for accurate speed reporting.
AL.15: Speed Jump Alarm
Description:
The AL.15 Speed Jump Alarm is triggered when abrupt and unexpected speed changes are detected. This is important for maintaining system stability and preventing sudden movements.
Possible Causes and Solutions:
- Speed Control Settings: Review and adjust speed control settings.
- Mechanical Issues: Inspect mechanical components for irregularities.
- System Configuration: Ensure the system is configured to handle speed changes smoothly.
AL.16: Communication Error Alarm
Description:
The AL.16 Communication Error Alarm is triggered when there are issues in communication between different components of the servo drive system. This could involve communication with external devices or other components within the system.
Possible Causes and Solutions:
- Faulty Cables: Check communication cables for damage or poor connections.
- Communication Settings: Verify that communication settings are configured correctly.
- External Interference: Address any external factors causing interference in communication.
AL.17: Analog Input Fault Alarm
Description:
The AL.17 Analog Input Fault Alarm is activated when there are issues with analog input signals, which are essential for controlling certain parameters of the servo drive.
Possible Causes and Solutions:
- Faulty Analog Devices: Inspect analog input devices for faults or malfunction.
- Wiring Issues: Check the wiring connected to analog input devices.
- Calibration: Ensure proper calibration of analog input devices.
AL.18: Serial Communication Error Alarm
Description:
The AL.18 Serial Communication Error Alarm occurs when there are faults in the serial communication between the servo drive and connected devices. This can include communication through protocols like Modbus or RS-485.
Possible Causes and Solutions:
- Faulty Serial Cables: Inspect serial communication cables for damage.
- Communication Protocols: Verify that the correct communication protocols are being used.
- Device Compatibility: Ensure that connected devices are compatible with the chosen communication method.
AL.19: Non-volatile Memory Error Alarm
Description:
The AL.19 Non-volatile Memory Error Alarm is activated when issues are detected in the non-volatile memory of the servo drive. Non-volatile memory stores critical data that persists even when the power is turned off.
Possible Causes and Solutions:
- Memory Corruption: Address any issues related to memory corruption.
- Memory Module Inspection: Inspect the non-volatile memory module for physical damage.
- Firmware Update: Consider updating the firmware to resolve potential software-related memory issues.
AL.20: Current Detection Circuit Fault Alarm
Description:
The AL.20 Current Detection Circuit Fault Alarm is triggered when there are faults in the circuit responsible for detecting current levels in the servo drive system.
Possible Causes and Solutions:
- Faulty Detection Components: Inspect components in the current detection circuit for faults.
- Wiring Issues: Check the wiring connected to the current detection circuit.
- Circuit Calibration: Ensure proper calibration of the current detection circuit.
Conclusion
understanding and addressing Mitsubishi servo drive alarms are crucial for maintaining the optimal performance and reliability of industrial automation systems. Each alarm code represents a specific issue within the servo drive system, necessitating prompt and accurate diagnosis for efficient troubleshooting. Here are some key takeaways:
Systematic Troubleshooting:
- Approach troubleshooting systematically by identifying potential causes for each alarm code.
- Inspect key components such as motors, wiring, encoders, and mechanical elements to address specific issues.
Preventive Measures:
- Implement regular maintenance schedules to proactively identify and resolve potential problems before they lead to alarms.
- Monitor and control factors such as load variations, speed deviations, and temperature to prevent alarms related to these aspects.
Communication and Connectivity:
- Address communication-related alarms promptly by checking cables, communication settings, and external interference.
- Verify compatibility and correct communication protocols, especially for serial communication systems.
Sensor and Feedback Systems:
- Ensure accurate sensor feedback, especially in cases of encoder faults or load detection issues.
- Regularly calibrate and inspect analog input devices to prevent faults related to analog input signals.
Memory and Firmware:
- Pay attention to non-volatile memory errors by inspecting memory modules and addressing potential corruption issues.
- Stay up-to-date with firmware updates to resolve software-related concerns and enhance system stability.
