Encoder feedback loss

What does F00090 mean?

The drive has lost feedback from the encoder, which is critical for precise speed and position control. This can be caused by physical disconnections, a faulty encoder, incorrect parameter settings (like p0400 or p1300), or the encoder signal being outside expected limits, leading to uncontrolled motor operation or a complete shutdown.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   If r0949 = 2 (low speed loss), adjust p0494, p1120, or p1121; if r0949 = 5 or 7, consider switching to SLVC mode (p1300 = 20 or 22).

2. 4

   Test the encoder by setting p1300 = 0, running at a fixed speed, and observing the encoder feedback signal in r0061.

3. 5

   Increase the encoder loss threshold in p0492 if the environment causes nuisance trips.