YASKAWA FSDrive-MV1S Instructions Manual page 136

Acceleration/
deceleration time
switching frequency
(C1-11)
Entering S-curve Characteristics in the Acceleration and Deceleration Time
By performing acceleration and deceleration using an S-curve pattern, you can reduce shock when starting and
stopping the machine.
Using the Inverter, you can set an S-curve characteristic time for each of the following: Acceleration start
time, deceleration start time, acceleration end time, and deceleration end time.
INFO
Setting Example
The S-curve characteristic when switching operation (forward/reverse) is shown in the following diagram.
Forward
Reverse
Output frequency
-12
6
Output frequency
C1-07 rate C1-01 rate
When output frequency ≥ C1-11, acceleration and deceleration are performed using
Acceleration/deceleration Time 1 (C1-01, C1-02).
When output frequency < C1-11, acceleration and deceleration are performed using
Acceleration/deceleration Time 4 (C1-07, C1-08).
Fig 6.8 Acceleration/deceleration Time Switching Frequency
Set the S-curve characteristic time to lengthen acceleration/deceleration time as follows:
Acceleration time = Selected acceleration time + (Acceleration start time S-curve characteristic time +
Acceleration end time S-curve characteristic time) / 2
Deceleration time = Selected deceleration time + (Deceleration start time S-curve characteristic time +
Deceleration end time S-curve characteristic time) / 2
C2-02
C2-01
Fig 6.9 S-curve Characteristic during Operation Switching
C1-02 rate C1-08 rate
C2-04
C2-03
C2-01
C2-02
C2-04
C2-03