Delta ASDA-A3 Series User Manual page 361

Operation Mode
S-curve filter for analog commands
The Analog Speed command filter helps to stabilize the motor operation when the analog input
signal (speed) changes rapidly.
6
Speed (rpm)
3000
0
-3000
The Analog Speed command filter smoothes the analog input signal. Its time program is the
same as that of the S-curve filter for normal speed command. Also, the speed and acceleration
curves are both continuous. The preceding diagram shows the curve of the Speed command
and the motor speed when you apply the Analog Speed command filter. The slopes of the
Speed command in acceleration / deceleration are different. You can adjust the time setting
(P1.034, P1.035, and P1.036) according to the actual application to improve the performance.
Low-pass filter for speed commands
You usually use the low-pass filter to remove unwanted high-frequency response or noise so
that the speed change is smoother.
Refer to Chapter 8 for detailed descriptions of the relevant parameter.
Parameter
P1.006
6-20
(1) Analog Speed command; (2) Motor speed
Speed command - smoothing constant (low-pass filter)
Speed command
Target speed
P1.006
Function
t
ASDA-A3
Time (sec)