Frequency Setting Signal 0Hz Dead Zone Handling Function; Dc Braking - Toshiba VF-PS1 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
Frequency command dead band

Operation frequency
command value
Output after handling
of the dead zone

6.8

DC braking

6.8.1 DC braking
 : DC braking start 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
 DC braking start frequency
 DC braking current
DC braking time

Forward/reverse DC braking priority control


0 A B
Function
0Hz
Operation frequency
command value
Function
F-13
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.
:Disabled, :Enabled
E6581386
Default setting

6
Default setting



