P9 ASD Installation and Operation Manual 81
Acceleration Time 1
Program Fundamental Accel/Decel 1 Settings
This parameter specifies the time in seconds for the output of the ASD to go
from 0.0 Hz to the Maximum Frequency for the 1 Acceleration profile. The
Accel/Decel pattern may be set using F502. The minimum Accel/Decel time
may be set using F508.
Note: An acceleration time shorter than that which the load will allow
may cause nuisance tripping and mechanical stress to loads.
Automatic Accel/Decel, Stall, and Ridethrough settings may
lengthen the acceleration times.
Acceleration
The acceleration rate of a motor is determined by several factors: applied
power, applied load, and the physical properties of the motor (winding
parameters, motor size, etc.). The ASD will control the first of these factors:
input power. The settings of the ASD will control the frequency and amplitude
of the applied voltage to the motor.
Under most operating conditions, as the output frequency of the ASD goes up,
so does the output voltage (linear acceleration). The ASD has the ability to
modify the relationship between frequency and voltage automatically to
produce smoother operation or increased (starting) torque (see
F502).
Direct Access Number — F009
Parameter Type — Numerical
Factory Default — (ASD-Dependent)
Changeable During Run — Yes
Minimum — 0.1
Maximum — 6000
Units — Seconds
Deceleration Time 1
Program Fundamental Accel/Decel 1 Settings
This parameter specifies the time in seconds for the output of the ASD to go
from the Maximum Frequency to 0.0 Hz for the 1 Deceleration profile. The
Accel/Decel pattern may be set using F502.
When operating with the Automatic Accel/Decel enabled (F000), the minimum
accel/decel time may be set using F508.
Note: A deceleration time shorter than the load will allow may cause
nuisance tripping and mechanical stress to loads. Automatic
Accel/Decel, Stall, and Ridethrough settings may lengthen the
deceleration times.
Direct Access Number — F010
Parameter Type — Numerical
Factory Default — (ASD-Dependent)
Changeable During Run — Yes
Minimum — 0.1
Maximum — 6000
Units — Seconds
Maximum Frequency
Program Fundamental Frequency Settings
This setting determines the absolute maximum frequency that the ASD can
output.
Accel/Decel times are calculated based on the Maximum Frequency setting.
The Maximum Frequency is not limited by this setting while operating in the
Drooping Control mode.
See F320 for additional information on this parameter.
Note: This setting may not be lower than the Upper-Limit Frequency
(
F012) setting.
Direct Access Number — F011
Parameter Type — Numerical
Factory Default — 66.0
Changeable During Run — No
Minimum — Upper-Limit Freq. (F012)
Maximum — 299.0
Units — Hz
F009 F011
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