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6
6.18 Acceleration/deceleration suspend function
:
Acceleration/deceleration
suspend function
:
Acceleration suspend frequency
: Acceleration suspend time
:
Deceleration suspend frequency
: Deceleration 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 Function Adjustment range Setting value
Acceleration/deceleration suspend function
:Disabled
:Parameter setting
:Terminal input
Acceleration suspend frequency ~ Hz
Acceleration suspend time ~ sec.
Deceleration suspend frequency ~ Hz
Deceleration suspend time ~ sec.
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]
Time [s]
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]
Time [s]
Terminal board input
Ex.) When using the RR/S4 terminal as the acceleration/deceleration suspend terminal
Title Function Adjustment range
Example of setting
Input terminal function selection 8 (RR/S4) ~