Control Circuit Error

What does CPF18 mean?

This code indicates a generic hardware problem within the drive's control circuit. This suggests an internal malfunction that could prevent safe and reliable operation and may require internal component inspection or replacement.

• Failure of the safety circuit monitoring logic on the control board (e.g., STO - Safe Torque Off path verification).
• Internal discrepancy between redundant safety channels (if implemented) detected by the control circuit.
• Corrupted safety-related parameters (e.g., P10-01 STO Status, P10-02 Safety Function Configuration) leading to misinterpretation of safety states.
• Component damage (e.g., safety relay drivers, monitoring ICs) within the control board's safety-critical sections.

Click steps to track your progress.

1. 1

   Document all safety-related parameters (e.g., P10-01, P10-02) and general operating parameters (P1-01, P2-01) from the drive.

2. 2

   Perform a full power down of the drive by removing incoming AC power (L1, L2, L3) and control power (e.g., 24VDC) for 10 minutes.

3. 3

   Verify all external safety circuit wiring (e.g., emergency stop, guard interlocks) connected to the drive's safety terminals (e.g., Safe Input 1, Safe Input 2) is correct and uncompromised.

4. 4

   Visually inspect the control board for any signs of physical damage, particularly in areas associated with safety inputs and internal safety relays.

5. 5

   If the drive has a removable safety module, remove it, clean contacts with electrical cleaner, and reinsert it firmly.

6. 6

   Attempt to reset the safety function (often through a specific parameter, e.g., P10-03 Safety Reset) or perform a factory parameter reset (P9-02) as a last resort.