Speed error

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The actual motor speed is not equal to the commanded reference speed. For Permanent Magnet Synchronous (PMS) motors, this specifically indicates that the pull-out torque has been exceeded.

• Actual motor speed deviates significantly from the setpoint.
• Speed feedback from encoder does not match commanded speed (P1-54).
• Motor load exceeding capability, causing speed drop.
• Incorrect PID speed control parameters.

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1. 1

   Check the encoder connection for integrity, proper signal transmission, and correct phasing.

2. 2

   For PMS motors, either reduce the mechanical load on the motor or verify the motor sizing is adequate if the pull-out torque has been exceeded.