Altivar® 58 TRX AC Drives
Drive and Motor Configuration Parameters
Motor Power Factor
This parameter is used to enter the motor power factor given on the motor nameplate. This allows the drive to provide better current regulation for better motor torque performance. The factory setting depends on the drive controller rating. The range for this parameter is 0.5 to 1.
Auto Tune
This parameter causes the drive controller to auto tune the connected motor. When Auto Tune is initiated, the drive controller allows a pulse of current to pass to the connected motor, and measures and stores motor stator resistance and conductor resistance. This allows the drive to provide better current regulation for improved motor torque performance. Auto Tune can be initiated from the keypad, by a logic input assigned to this function, or over a serial communication link.
Automatic Adaptation of the Deceleration Ramp
This function provides automatic adaptation of the deceleration ramp if the programmed ramp setting is too low for the inertia of the load. This prevents possible faulting of the drive controller due to excessive braking. All applications, except those requiring precise stopping and those which use braking resistors, may benefit from this function.
The setting of this function is either Yes or No, with the default setting determined by the macro- configuration. Automatic adaptation must be cancelled if the machine has position control with stopping on a ramp and a braking resistor installed. If a braking sequence is configured, this function is automatically disabled.
Alternate Ramp Switching using Frequency Threshold
Alternate ramp switching allows switching between two sets of acceleration and deceleration ramp times, with each set being adjusted separately. To switch between the two sets, a frequency threshold can be defined. (A logic input may also be configured for ramp switching; see page 53.)
Ramp switching is particularly suited for the following:
•Material handling applications that require smooth starting and approach.
•Applications involving fast,
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09/2003 |
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