Acceleration/Deceleration Suspend Function - Toshiba TOSVERT VF-AS1 Instruction Manual

6.18

Acceleration/deceleration suspend function

 : Acceleration/deceleration
suspend function
 : Acceleration suspend frequency
 : Acceleration suspend time
• Function
Using these parameters, acceleration or deceleration can be suspended to let the motor run at a constant
speed. There are two ways to suspend acceleration or deceleration: suspending it automatically by setting
the suspend frequency and time using parameters, and suspending it by means of a signal from an
external control device.
These parameters are useful in starting and stopping transfer equipment, textile machines (winders), and
so on.
[Parameter setting]
Title
Acceleration/deceleration suspend function

Acceleration suspend frequency

Acceleration suspend time

Deceleration suspend frequency

Deceleration suspend time

Note1: The acceleration suspend frequency () should not be set below the starting frequency ().
Note2: The deceleration suspend frequency () should not be set below the stop frequency ().
Note3: If the output frequency is lowered by a stall prevention function, the acceleration suspend function may be
activated.
1) To suspend acceleration or deceleration automatically
Set the desired frequency with  or  and the desired time with  or , and then set
 to .
When the frequency set is reached, the motor stops accelerating or decelerating to rotate at a constant speed.
Output frequency [Hz]


2) To suspend acceleration or deceleration by means of a signal from an external control device
Set  for the desired external signal input terminal. As long as ON signals are inputted, the motor continues to
rotate at a constant speed.
Output frequency [Hz]
Terminal board input
Ex.) When using the RR/S4 terminal as the acceleration/deceleration suspend terminal
Title
 Input terminal function selection 8 (RR/S4)
 : Deceleration suspend frequency
 : Deceleration suspend time
Function
:Disabled
:Parameter setting
:Terminal input
~ Hz
~ sec.
~ Hz
~ sec.

Function
F-31
Adjustment range
Time [s]

Time [s]
Adjustment range Example of setting
~
E6581445
Setting value




6

