Encoder feedback loss warning

What does A00590 mean?

This warning indicates a loss of signal from the motor encoder, potentially causing the inverter to switch to sensorless vector control. Causes range from physical disconnection or faulty encoder hardware to incorrect parameterization where an encoder is expected but not configured or selected, leading to imprecise speed or position control.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Ensure the correct encoder type is selected in P0400; if r0949=5 and an encoder is fitted, configure P0400.

2. 4

   If no encoder is fitted and sensored control is not desired, select sensorless vector control mode (P1300=20 or 22) or set P0400=0.

3. 5

   Test the encoder's functionality by operating the drive at a fixed speed (P1300=0) and monitoring the feedback signal (r0061).