Parker AC890PX Series, Engineering Reference

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C h a p t e r 3 : I n s t a l l i n g t h e D r i v e
3-39
AC890PX AC Drive
Performing a Rotating Autotune
NOTE The drive will not perform an Autotune when in Volts/Hz Mode (Open-Loop Drive.) An Autotune is not necessary in
this control mode.
Check that the motor can rotate freely in the forward direction. Ensure also that the motor is unloaded. Ideally, the motor
shaft should be disconnected. If the motor is connected to a gearbox this is okay, provided that there is nothing on the output
of the gearbox which could load the motor.
1.
In the QUICK SETUP menu, set MAX SPEED to the maximum speed at which you will operate the drive in normal
operation. The Autotune will characterise the motor up to 30% above this speed. If you later wish to run faster than this,
you will need to carry out another Autotune.
2. Set AUTOTUNE ENABLE to TRUE, and start the drive . The drive will carry out a Rotating Autotune (indicated by
the Run and Stop led’s flashing. This may take several minutes,
during
which the motor will be accelerated to maximum
speed and then brought to a stop. When complete, the drive is returned to the stopped condition and the AUTOTUNE
ENABLE parameter is reset to FALSE. In Closed-loop Vector mode (with an encoder) the encoder sign has been adjusted
by the Autotune feature.
IMPORTANT Now perform a SAVE CONFIG to save your new settings. Refer to Chapter 6: “The Keypad” - SAVE CONFIG.