PID Feedback Loss

Hva betyr FbL ?

The drive has detected a loss or significant deviation in the feedback signal for its PID control loop. This prevents proper process control, as the drive cannot accurately assess the controlled variable.

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1. 1

   Inspect all feedback sensor wiring for loose connections, damage, or improper shielding between the sensor and the drive's input terminals.

2. 2

   Verify the feedback sensor's power supply voltage and measure its output signal (e.g., V, mA, Hz) directly at the sensor terminals to confirm proper operation.

3. 3

   Measure the feedback signal (e.g., voltage, current, frequency) at the corresponding analog or digital input terminals of the Yaskawa P1000 drive to confirm signal presence and integrity.

4. 4

   Check the Yaskawa P1000 drive's PID feedback parameters (e.g., input source selection, scaling, filtering) to ensure they are correctly configured for the installed sensor type and process requirements.