Toshiba G7 Operation Manual page 69

F009
Accel #1 Time
Program ⇒ Fundamental Parameters ⇒ Accel/Decel #1 Settings
This parameter specifies the time in seconds for the drive 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 the load will allow may cause
nuisance tripping and mechanical stress to loads.
Automatic Accel/Decel and Stall settings may lengthen the
acceleration time.
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 control the frequency and amplitude of
the applied voltage to the motor.
Under most operating conditions, as the output frequency of the drive 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.
Decel #1 Time
Program ⇒ Fundamental Parameters ⇒ Accel/Decel #1 Settings
This parameter specifies the time in seconds for the drive 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 and Stall settings may lengthen the
acceleration time.
Maximum Frequency
Program ⇒ Fundamental Parameters ⇒ Frequency Settings
This setting determines the absolute maximum frequency that the ASD can
output. This setting is also referred to as FH.
Accel/decel times are calculated based on the Maximum Frequency setting.
Note: This setting may not be lower than the Upper Limit setting
).
(F012
Upper Limit Frequency
Program ⇒ Fundamental Parameters ⇒ Frequency Settings
This parameter sets the highest frequency that the ASD will accept as a
frequency command or frequency setpoint. The ASD may output frequencies
higher than the Upper Limit Frequency (but, lower than the Maximum
Frequency) when operating in the PID Control mode, Torque Control mode,
or the Vector Control modes (sensorless or feedback).
Note: This setting may not be higher than the Maximum Frequency
)
(F011 setting.
G7 ASD Operation Manual
Direct Access Number — F009
Parameter Type — Numerical
Factory Default — (ASD-dependent)
Changeable During Run — Yes
Minimum — 0.1
Maximum — 6000
Units — Seconds
Direct Access Number — F010
Parameter Type — Numerical
Factory Default — (ASD-dependent)
Changeable During Run — Yes
Minimum — 0.1
Maximum — 6000
Units — Seconds
Direct Access Number — F011
Parameter Type — Numerical
Factory Default — 80.0
Changeable During Run — No
Minimum — 30.0
Maximum — 299.0
Units — Hz
Direct Access Number — F012
Parameter Type — Numerical
Factory Default — 80.0
Changeable During Run — Yes
Minimum — 0.0
Maximum — Max. Freq. (F011)
Units — Hz
F012
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