Error Codes and Solutions

bUS: Option Communication Error

    Symptoms: Connection lost after initial communication. Detected when the run command frequency reference is assigned to an option card.
    Causes and Solutions:
    - No signal from the PLC: Check and correct faulty wiring. Ensure no loose wires or short circuits.
    - Faulty communication cable or short circuit: Minimize noise effects, use recommended cables, separate wiring, and install noise filters.
    - Damaged option card: Replace if wiring is fine and error persists.
    - Improper connection of the option card: Realign and reinstall the option card.

CE: MEMOBUS/Modbus Communication Error

    Symptom: Control data not received for the set detection time (H5-09).
    Causes and Solutions:
    - Faulty communications wiring or short circuit: Check and correct wiring. Repair loose wires or short circuits.
    - Communications data error due to noise: Follow the same steps as for the bUS error to minimize noise and ensure proper cabling.

CF: Control Fault

    Symptom: Torque limit reached continuously for three seconds or longer during a ramp to stop in Open Loop Vector Control.
    Causes and Solutions:
    - Improper motor parameter settings: Check and repeat Auto-Tuning.
    - Torque limit too low: Set the torque limit to an appropriate setting (L7-01 through L7-04).
    - High load inertia: Adjust the deceleration time and set the frequency to the minimum value when the drive finishes decelerating.

CoF: Current Offset Fault

    Symptom: Problem with the current detection circuit or attempting to start a coasting PM motor.
    Causes and Solutions:
    - Exceeded allowable setting range during automatic adjustment: Enable Speed Search at start (b3-01 = 1) and use multi-function terminals for External Speed Search 1 and 2 (H1-.. = 61 or 62).

CPF02: A/D Conversion Error

    Symptom: An A/D conversion error occurred.
    Causes and Solutions:
    - Damaged control circuit: Cycle power to the drive. Replace the drive if the problem continues.
    - Shorted control circuit terminals: Check and correct wiring. Ensure control terminal input current does not exceed 20 mA.

CPF03: PWM Data Error

    Symptom: Problem with the PWM data.
    Causes and Solutions:
    - Damaged drive hardware: Replace the drive.

CPF06: EEPROM Data Error

    Symptom: Error in the data saved to EEPROM.
    Causes and Solutions:
    - Not specified in the provided text. Generally, this may require checking the EEPROM or replacing the drive if the error persists.

CPF07: Terminal Board Communications Error

    Symptom: A communication error occurred at the terminal board.
    Causes and Solutions:
    - Faulty connection between the terminal board and control board: Turn off the power and reconnect the control circuit terminals.

CPF08: EEPROM Serial Communication Fault

    Symptom: EEPROM communications are not functioning properly.
    Causes and Solutions:
    - Terminal board or control board is not connected properly: Turn off the power and check the control terminal connections.

CPF11: RAM Fault

    Symptom: Hardware is damaged.
    Causes and Solutions:
    - Replace the drive.

CPF12: FLASH Memory Fault

    Symptom: Problem with the ROM (FLASH memory).
    Causes and Solutions:
    - Replace the drive.

CPF13: Watchdog Circuit Exception

    Symptom: Self-diagnostics problem.
    Causes and Solutions:
    - Replace the drive.

CPF14: Control Circuit Fault

    Symptom: CPU error (CPU operates incorrectly due to noise, etc.)
    Causes and Solutions:
    - Replace the drive.

CPF16: Clock Fault

    Symptom: Standard clock error.
    Causes and Solutions:
    - Replace the drive.

CPF17: Timing Fault

    Symptom: A timing error occurred during an internal process.
    Causes and Solutions:
    - Replace the drive.

CPF18: Control Circuit Fault

    Symptom: CPU error (CPU operates incorrectly due to noise, etc.)
    Causes and Solutions:
    - Replace the drive.

CPF19: Control Circuit Fault

    Symptom: CPU error (CPU operates incorrectly due to noise, etc.)
    Causes and Solutions:
    - Replace the drive.

CPF20 or CPF21:

    Symptom: One of the following faults occurred: RAM fault, FLASH memory error, watchdog circuit exception, clock error.
    Causes and Solutions:
    - Replace the drive.

CPF22: A/D Conversion Fault

    Symptom: A/D conversion error