Frequency Setting Signal 0Hz Dead Zone Handling Function; Dc Braking - Toshiba TOSVERT VF-AS1 Instruction Manual

Output frequency [Hz]



6.7.3. Frequency setting signal 0Hz dead zone handling function

 : Frequency command dead band
• Function
If the frequency is set to 0Hz by means of an analog signal so that the motor shaft can be locked by sensor
vector control (=) the frequency may not always be 0Hz because of drift or offset.
In such a case, this parameter allows you to correctly set the operation frequency command to 0Hz. If the
operation frequency command is below the frequency setting signal 0Hz insensitive frequency set with
, parameter  will adjust the operation frequency command to 0Hz.
[Parameter setting]
Title
6

Operation frequency
command value
Output after handling
of the dead zone
6.8

DC braking

6.8.1 DC braking
 : DC braking starting frequency
 : DC braking current
• Function
A large braking torque can be obtained by applying a direct current to the motor. These parameters set the
direct current applied to the motor, the application time and the start frequency.
[Parameter setting]
Title





+


– 
0 A B
Function
Frequency command dead band

0Hz
Operation frequency
command value
Function
DC braking start frequency
DC braking current
DC braking time
Forward/reverse DC braking priority control
The inverter begins accelerating after
the frequency command value has
reached point B.
Deceleration stop begins when the
frequency command value decreases
below point A.
100% Operation frequency command value
Adjustment range
~Hz
Note 1: This function is invalid to preset
the speed operation frequency
command.
Note 2: It is effective as frequency
instruction is to the frequency
reference chosen by ,
, communication,etc.
Note 3: The addition and multiplication of
the override function is carried out
to the frequency in which this
function operated.
 : DC braking time
 : Forward/reverse DC braking
priority control
Adjustment range
~Hz
~%
~ sec.
:OFF, :ON
F-14
E6581301
Default setting

Default setting



