Override Function; Acceleration And Decleration Time; Set To Suit The Motor - Toshiba TOSVERT VF-PS1 Instruction Manual

4.1.3. Override function

Speed type
You can add or multiply for process value by override function (f660, f661).
<VF-AS1 only>
Multiplication gain is able to set by parameter f729.
See the inverter instruction manual for the detail of the setting.
*
The functions are valid for process type PID control, but it is not used actually.
Dancer control
Dancer control uses override addition function (f660) for speed reference.

4.1.4. Acceleration and decleration time

Process type Dancer control
Set the acceleration time (acc) and the deceleration time (dec) to small for quick response.
But too small setting cause inverter trip.
Speed type
Speed PID control set the acceleration time and the deceleration time to the smallest automatically in
spite of parameter(acc,dec) setting.
*Adjust each gain in case of inverter trip. If you need to set the acceleration time and the deceleration
time larger, change the process type PID control.

4.2. Set to suit the motor

Set the following parameters to suit the motor if necessary.
These parameters are valid for actual output frequency (result of PID control).
Title Function
Maximum frequency
fh
Upper limit frequency
ul
ll Lower limit frequency
f270～
Jump frequency
f275
1 to 3
Starting frequency
f240
setting
Operation start
f241
frequency
Stop frequency
f243
setting
1) Set the maximum frequency of output frequency.
2) It is base of the acceleration time (acc) and the
deceleration time (dec).
Acceleration time (acc) is from 0Hz to fh.
Deceleration time (dec) is from fh to 0Hz.
It is upper limit of output frequency.
It is lower limit of output frequency.
Set the jump frequency to avoid (jump) resonance frequency of
machinery if necessary.
1) Inverter output the frequency setted by f240 immediately.
2) It is useful for quick response of starting torque.
Inverter operates RUN and STOP by f241 setting frequency
The output frequency is dropped to 0Hz at the frequency setted
by f243.
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Discription
E6581329①