Acceleration and Deceleration Characteristics
5-19
5
Acceleration and S-curve Settings
Five different S-curve times are used to reduce the jerk when the speed changes.
Related Parameters
Fig 5.6 shows the influence of the differnt S-curve timed.
Fig 5.6 S-curve settings
Dwell at Start Function
When S1-26 (dwell speed reference) is set and frequency reference is above S1-26, the Dwell at start function
is activated.
When the inverter starts, the inverter accelerates to S1-26 speed with C1-07 acceleration time. Once the motor
speed exceeds the C1-11 frequency, the inverter will use the original acceleration time.
Fig 5.7 Dwell at strart function
Parameter
No.
Name
Factory
Setting
Change
during
Opera-
tion
Control Methods
V/f
Open
Loop
Vector
Closed
Loop
Vector
C2-01 S-curve characteristic time at acceleration start 0.5 s No Q Q Q
C2-02 S-curve characteristic time at acceleration end 0.5 s No Q Q Q
C2-03 S-curve characteristic time at deceleration start 0.5 s No Q Q Q
C2-04 S-curve characteristic time at deceleration end 0.5 s No Q Q Q
C2-05 S-curve characteristic time below leveling 0.5 s No Q Q Q
C2-05
C2-01
C2-02
C2-04
C2-03
Leveling Speed
Internal RUN
300% torque
Torque comp.at start
level
Latch
S1-26
Soft Starter
Motor speed
C1-11
C1-07
Dwell at start function
Brake release
http://nicontrols.com
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