Er.220 - Phase Sequence Error

Fault Code Description:
Er.220 indicates that after the servo drive performs angular auto-tuning, the UVW phase sequence of the servo drive is inconsistent with the motor’s phase sequence. This error may be caused by incorrect phase wiring between the motor and drive.

Causes:

    Servo drive UVW phase sequence is inconsistent with the motor:
- The UVW cables of the servo drive may be incorrectly wired in relation to the motor’s UVW phase sequence.

Troubleshooting and Solutions:

    Phase sequence inconsistency:
- Troubleshooting Method: Restart the servo drive multiple times and perform the auto-tuning procedure. If the error persists, verify that the UVW phase sequence is consistent with the motor’s.
- Solution: Ensure that the UVW cables are correctly wired, then perform the auto-tuning process again. If the wiring is incorrect, rewire the phases correctly.

Summary:
Er.220 error occurs due to incorrect UVW phase wiring. The solution is to check the phase sequence, correct the wiring, and perform auto-tuning again.

Er.234 - Runaway Fault

Fault Code Description:
Er.234 occurs when the torque reference direction is opposite to the speed feedback direction, or when the speed feedback direction is opposite to the speed reference direction. This can cause the motor to go out of control, often due to phase sequence errors, encoder issues, or incorrect detection of the motor rotor’s initial phase.

Causes:

    Incorrect UVW phase sequence:
- The UVW phase sequence of the servo drive may be mismatched with the motor.

    Incorrect motor rotor initial phase detection due to interference during startup:
- Even with the correct UVW phase sequence, the error may occur when the servo drive is enabled.

    Incorrect encoder type or faulty wiring:
- The encoder type may be incorrectly set, or the wiring may be faulty.

    Loose, corroded, or improperly connected encoder cable:
- The encoder cable may be loose, incorrectly connected, or corroded.

    Excessive load in vertical shaft control:
- When controlling a vertical shaft, an excessive load may cause the motor to go out of control.

Troubleshooting and Solutions:

    Incorrect UVW phase sequence:
- Troubleshooting Method: Check whether the UVW phase sequence of the servo drive matches the motor.
- Solution: Reconnect the UVW cables according to the correct phase sequence.

    Incorrect motor rotor initial phase detection:
- Troubleshooting Method: If you still receive the Er.234 error after verifying the correct UVW phase sequence, this may indicate a phase detection issue.
- Solution: Shut down and restart the servo system.

    Incorrect encoder type or faulty wiring:
- Troubleshooting Method: Check the labels of the servo drive and motor. Ensure that an IS620P series servo drive and 20-bit encoder motor are being used.
- Solution: Verify the motor model, encoder type, and wiring, and correct the settings as needed.

    Loose or corroded encoder cable:
- Troubleshooting Method: Ensure that the encoder cable is a standard one provided by Inovance. Check for corrosion or looseness.
- Solution: Resolder or tighten the cables, or replace the encoder cable if necessary.

    Excessive load in vertical shaft control:
- Troubleshooting Method: Check the load on the vertical shaft. Adjust the brake parameters (H02-09 to H02-12) to see if there is an overload.
- Solution: Reduce the load on the vertical shaft or reinforce the system. Optionally, disable the runaway fault by setting H0A-12 = 0, ensuring safety is not compromised.

Summary:
Er.234 error occurs due to phase sequence errors, encoder problems, or incorrect detection of the motor rotor’s initial phase, causing the motor to go out of control. The solution is to check the phase sequence, encoder type, wiring, and load conditions.

Er.300 - Safe Torque Off (STO) Protection

Fault Code Description:
Er.300 indicates that the Safe Torque Off (STO) protection terminal is active. STO stops the motor from producing torque for safety reasons, typically in emergency or hazardous situations. This error may be triggered by an unintentional or faulty signal activating the STO terminal.

Causes:

    STO protection terminal is active:
- The signal received by the STO input terminal is active, preventing the motor from producing torque.

Troubleshooting and Solutions:

    STO protection terminal is active:
- Troubleshooting Method: Check the status of the STO terminal to see if the STO input signal is unintentionally active.
- Solution: Clear the STO input signal and deactivate the STO protection. If the signal was unintentionally activated, inspect the connections to the STO terminal.

Summary:
Er.300 indicates that the STO protection terminal is active, stopping the motor from producing torque. To resolve this, check the STO input signal and connections to ensure proper operation.

Er.400 - Main Circuit Overvoltage

Fault Code Description:
Er.400 indicates that the DC bus voltage in the main circuit has reached excessive levels. This can be caused by power supply fluctuations, regenerative resistor issues, rapid acceleration/deceleration, or internal hardware problems in the servo drive.

Causes:

    Main circuit input voltage too high:
- The input voltage of the servo drive may exceed specified limits.

    Unstable power supply or lightning strikes:
- Voltage spikes or instability in the power supply can occur due to external factors like lightning.

    Faulty regenerative resistor:
- The internal or external regenerative resistor may be faulty, or its resistance may be too high.

    Regenerative resistor too large, insufficient energy absorption during braking:
- The selected regenerative resistor may not absorb the braking energy adequately.

    Motor is rapidly accelerating/decelerating:
- Excessive braking energy may be generated when the motor rapidly accelerates or decelerates.

    DC bus voltage sampling deviation:
- The DC bus voltage sampling value may deviate significantly from the actual measured value.

    Servo drive failure:
- Internal hardware failure in the servo drive may be causing the error.

Troubleshooting and Solutions:

    Main circuit input voltage too high:
- Troubleshooting Method: Measure the RST input voltage at the servo drive. Verify whether the input voltage is within the specified range for 220 VAC and 380 VAC drives.
- Solution: Adjust or replace the power supply and ensure the input voltage is within specified limits.

    Unstable power supply or lightning strike:
- Troubleshooting Method: Check whether the power supply has been affected by lightning or is unstable.
- Solution: Add a surge protector to the power supply. If the problem persists, replace the servo drive.

    Faulty regenerative resistor:
- Troubleshooting Method: If using an internal regenerative resistor, check the connection between P and D terminals. If using an external regenerative resistor, measure the resistance between P and C.
- Solution: If the resistance is ∞, there may be a break in the cable. If the resistance is too low, use an external regenerative resistor and check H02-25 settings. Replace the regenerative resistor if necessary.

    Regenerative resistor too large:
- Troubleshooting Method: Measure the resistance of the external regenerative resistor and compare it with recommended values.
- Solution: Select a regenerative resistor with the recommended value and update the H02-26 (power) and H02-27 (resistance) parameters accordingly.

    Motor is rapidly accelerating/decelerating:
- Troubleshooting Method: Check the acceleration/deceleration times and DC bus voltage during operation. Verify if the voltage exceeds the fault level during braking.
- Solution: Ensure the main circuit input voltage is within limits and extend the acceleration/deceleration times as much as possible.

    DC bus voltage sampling deviation:
- Troubleshooting Method: Measure the H0B-26 (bus voltage) value and check the DC bus voltage.
- Solution: If there is a deviation, contact technical support to recalibrate the voltage sampling.

    Servo drive failure:
- Troubleshooting Method: Power the main circuit on and off several times. If the error persists, the servo drive may be faulty.
- Solution: Replace the servo drive.

Summary:
Er.400 error occurs when excessive voltage is detected in the main circuit. To resolve this, check the input voltage, inspect the regenerative resistor, and adjust acceleration/deceleration times. If the error persists, replacing the servo drive may be necessary.

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