Setting Acceleration/Deceleration Time; Automatic Acceleration/Deceleration - Toshiba TOSVERT VF-AS1 Instruction Manual

5.2

Setting acceleration/deceleration time




• Function
1) For acceleration time 1  programs the time that it takes for the inverter output frequency to go from
0Hz to maximum frequency .
2) For deceleration time 1  programs the time that it takes for the inverter output frequency to got from
maximum frequency  to 0Hz.

5.2.1 Automatic acceleration/deceleration

This automatically adjusts acceleration and deceleration time in line with load size.
=

* Adjusts the acceleration/deceleration time automatically within the range of 1/8 to 8 times as long as the time
set with the  or , depending on the current rating of the inverter.
 =
* Automatically adjusts speed during acceleration only. During deceleration, speed is not adjusted
automatically but reduced at the rate set with .
5
Output
frequency [Hz]
Set  (automatic acceleration/deceleration) to  or .
[Parameter setting]
Title

When automatically setting acceleration/deceleration time, always change the acceleration/deceleration time so that
it conforms with the load.
The acceleration/deceleration time changes constantly with load fluctuations.
For inverters that requires a fixed acceleration/deceleration time, use the manual settings (, ).
When using a braking resistor or braking unit, do not set the =. Or the regenerative braking resistor may be
overloaded.
Use this parameter after actually connecting the motor.
Setting acceleration/deceleration time (, ) in conformance with mean load allows optimum setting that
conforms to further changes in load.
When the inverter is used with a load that fluctuates considerably, it may fail to adjust the acceleration or
deceleration time in time, and therefore may be tripped.
: Automatic acceleration/deceleration
: Acceleration time 1
: Deceleration time 1
When load is small

0
Acceleration Deceleration
Acceleration/deceleration time → decrease
Function
Automatic acceleration/deceleration
Output
When load is large
frequency [Hz]

0
Time [s]
Acceleration
Acceleration/deceleration time → increase
Adjustment range
:Disabled (Manual setting)
:Automatic setting
:Automatic setting (during
acceleration only)
E-2
E6581445
Time [s]
Deceleration
Default setting
