Yaskawa FSP Amplifier - Manual (Page 173)

FSP Amplifier User’s Manual Chapter 6: Servo Adjustment
6-6
6.2.5. Using the Soft Start Function
The soft start function adjusts progressive speed reference input inside the
servo amplifier so that acceleration and deceleration can be as constant as
possible. To use this function, set the following parameters.
Parameter Signal Setting (ms) Control Mode
Pn305 Soft Start Acceleration Time
Range: 0 to 10000
Default Setting: 0
Speed Control
Pn306 Soft Start Deceleration Time
Range: 0 to 10000
Default Setting: 0
Speed Control
In the servo amplifier, a speed reference is smoothed by the acceleration or
deceleration value set in Pn305 or Pn306 to provide speed control.
The soft start function enables smooth speed control when non-progressive
speed references are input or when contact input speed control is used.
Set both Pn305 and Pn306 to “0” for normal speed control, i.e when the
speed reference does not need to be smoothed.
Set these parameters as follows:
• Pn305: The time interval from the time the motor starts until the
maximum speed is reached.
• Pn306: The time interval from the time the motor is operating at the
maximum speed until it stops.
Speed reference
Soft start
Maximum speed
Pn305: Set this time interval.
Pn306 : Set this time interval.
FSP Amplifier's
internal speed reference
Maximum speed