PID Signal Fault

What does E.PID mean?

This fault indicates an issue with the feedback signal or control in the FR-A800's internal PID control loop. This prevents the inverter from accurately regulating a process variable based on the PID controller.

• Loss or instability of the PID feedback signal (e.g., from a pressure sensor, flow meter, or temperature sensor).
• Incorrect scaling or range settings for the PID feedback signal in the FR-A800 (e.g., Pr.130-Pr.132 for PID feedback input).
• Excessive noise or interference on the PID feedback signal line.
• Failure of the external sensor providing the PID feedback.
• Incorrect PID parameter tuning (e.g., Pr.133-Pr.136 for PID gains) leading to instability or an inability to reach the setpoint, causing a fault condition.

Click steps to track your progress.

1. 1

   Verify the wiring of the PID feedback sensor to the FR-A800 for secure connections and continuity.

2. 2

   Measure the PID feedback signal (voltage or current) at the FR-A800 terminals to ensure it is stable and within the expected range.

3. 3

   Check the external sensor providing the PID feedback for proper operation, calibration, and power supply.

4. 4

   Review the PID-related parameters in the FR-A800 (e.g., Pr.130-Pr.132 for feedback input, Pr.133-Pr.136 for PID gains, Pr.139 for PID fault detection) to ensure correct configuration.

5. 5

   If the feedback signal appears correct, try adjusting the PID gains to improve stability, or temporarily disable PID fault detection (if applicable) for diagnosis.