Parameter Reference D-6AC30V series Variable Speed DriveAutotuneSetup:: Motor Control::AutotuneParameters::Motor Control::AutotuneThe autotune is an automatic test sequence performed by the Drive to identify motor model parameters. The motor model is used by the Vectorcontrol modes.If an induction motor is used, and the control mode is set to vector control, you MUST perform an autotune before operating the Drive. It thecontrol mode is set to Open Loop (V/Hz) mode an autotune is not necessary. Whether the drive is in Vector Control mode or in Open Loop modeis determined by the parameter 0512 Control Strategy in menu Control Mode (see page D-19).The motor must be allowed to spin freely. It is acceptable for the motor to be connected to a load during autotune, provided that the load ispurely inertia, with negligible friction, and does not require the motor to produce torque in order to turn.Sometimes it not possible to spin the motor freely, for example it has already been connected to a machine and it is not convenient to uncouple it.In this case a stationary autotune must be carried out. Select Autotune Mode = STATIONARY. If you select stationary autotune, a parameterNameplate Mag Current will appear. You must enter the motor magnetising current into this parameter before proceeding with the stationaryautotune. Stationary autotune should be avoided if possible: first, because the magnetising current may not be accurate; second, becauseoperation above base speed requires the rotating autotune to map the motor characteristics in the field weakening region, and if this is not done,operation may not be possible above base speed.If a permanent magnet motor is used and there is no datasheet available from your motor provider, You MUST perform an autotune beforeoperating the Drive in the Vector control mode .If a permanent magnet motor is used and there is datasheet available from your motor provider, You must either perform an autotune beforeoperating the Drive in the Vector control mode or enter the required motor parameters from the datasheet.For best results is is better to carry out the autotune at the maximum speed that is likely to be required. If you run the autotune at a particularspeed, the motor characteristics will be measured up to this speed, and estimated above this speed. If you later discover that you need to run themotor faster than this, you can do this up to twice the speed at which the autotune is carried out, but the values will not be so accurate, and thecontrol may not be as good in this region. It is better to run another autotune at the higher speed. If you wish to run the motor at more than twicethe speed at which the autotune was carried out, this will not be allowed. If in doubt, the autotune speed is recorded in the parameter Max SpdWhen Autotuned, described below.PNO Parameter Descriptions0255 Autotune EnablePuts the autotune feature into a state where it will carry out the autotune when the drive is started.
