PID Feedback above max. Value

What does F00222 mean?

The feedback signal for the PID controller has exceeded its configured maximum threshold (p2267). This indicates an issue with the feedback sensor, its wiring, or an incorrect parameter setting, causing the PID loop to lose its reference and potentially leading to unstable or overdriven control.

• Feedback sensor (e.g., pressure transducer, flow meter) failure, providing an abnormally high output signal (e.g., 10V, 20mA, or higher).
• Wiring fault (e.g., short circuit to 24VDC supply, incorrect connection) in the analog feedback signal path to the drive's input terminals (e.g., AI0 on terminals 1 & 2).
• Incorrect configuration of the maximum feedback value parameter (P2267) or the analog input scaling (P2265, P2266).
• The actual process variable has genuinely exceeded the configured maximum threshold (e.g., overpressure, excessive flow) and is not a sensor or wiring issue.
• Analog input module or channel fault on the drive (e.g., AI0 input) stuck at a high reading.

Click steps to track your progress.

1. 1

   1. Use a multimeter to measure the analog feedback signal voltage or current (e.g., 0-10VDC or 4-20mA) directly at the sensor output terminals.

2. 2

   2. Measure the same analog signal at the drive's analog input terminals (e.g., terminals 1 & 2 for AI0) to check for wiring integrity.

3. 3

   3. Verify drive parameter P2267 (PID feedback maximum value) is correctly set to reflect the expected maximum operational feedback value.

4. 4

   4. Check analog input scaling parameters P2265 (Feedback actual value filter time) and P2266 (Feedback actual value offset) for proper configuration.

5. 5

   5. Inspect the sensor power supply (e.g., 24VDC) at the sensor terminals for correct voltage and stable current delivery.

6. 6

   6. Disconnect the sensor feedback wire from the drive's analog input terminal to observe if the signal drops to 0V (or min current), indicating a sensor or process issue.