Toshiba TOSVERT VF-AS3, Instruction Manual

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E6582062 
6. [Advanced] How to use parameters
6-40
4
4
6
9
6. 8. 3 Making the motor standstill with PG feedback
control
<F255: 0Hz command select at stop>
<F250: DC braking frequency>
<F252: DC braking time>
■ Function
This function works only for the speed control of PG feedback control. Use a way other than DC
braking to make the motor standstill.
When this function is set, the inverter outputs a 0 Hz command instead of applying DC braking when
stopping to make the motor standstill for the specified time.
■ Parameter setting
■ How to select a setting value
0: DC braking
This function works as the DC braking function described in [6. 8. 1].
1: 0 Hz command
This function works only for the speed control of PG feedback control.
The inverter outputs 0 Hz for the period set with <F252: DC braking time> when the frequency
reaches the setting value of <F250: DC braking frequency>.
It does not work when <F250: DC braking frequency> is set to "0.0".
With this function enabled, <F254: Motor shaft fixing control> cannot be used.
■ How to use
This function is used for PG feedback control (<Pt: V/f Pattern> = "10", "11").
You should set the terminals [S4] and [S5] or have any option for PG feedback.
The normal DC braking action (the same action set with <F255> = "0") is performed for non-PG
feedback control.
Title Parameter name Adjustment range Unit Default setting
F255 0Hz command select at
stop 0: DC braking
1: 0 Hz command 0
F250 DC braking frequency 0.0 - FH Hz 0.0
F252 DC braking time 0.0 - 25.5 s 1.0
0: Dc braking
1: 0Hz command
0.0Hz STOP
13:09
F255 : 0Hz command at stop