Yaskawa iQpump Controller Programming Manual - Manual (Page 43)

YASKAWA TM.iQp.07 iQpump Controller Programming Manual 43
C2 S-Curve Acc
◆ S-Curve Characteristics
Setting Range: 0.00 ~ 2.50 s
Factory Default: 0.20 s
Parameters C2-01 and C2-02 will affect the acceleration rate of the output frequency in order to reduce shock to the load. The S-curve
addition to the acceleration profile can ramp the acceleration rate from a 0 to the rate specified by the active Acceleration Time (C1-01 or
C1-03) and back to 0.
Figure 1.32
Figure 32. S-curve Characteristic Timing Diagram
The S-Curve transition into and out of the active acceleration rate can be programmed independently. C2-01 will ramp up the acceleration
from no acceleration up to the rate of C1-01 or C1-03. C2-02 will ramp the acceleration rate from the rate of C1-01 or C1-03 back down
to no acceleration (constant speed). The use of S-Curve characteristics will lengthen the overall acceleration time as follows:
Figure 1.33
Figure 33. S-Curve Characteristic Timing Diagram
Parameter No. Parameter Name
C2-01 S-Curve Characteristic at Start
C2-02 S-Curve Characteristic at Stop
Output Frequency Frequency Reference
Output Frequency
S-curve Characteristic
TIME
Time (Tsc)
Speed Command
Overall Aceleration Time Active Acceleration Time
C2-01 ( ) C2-02 ( )
+
2
---------------------------------------------- + =
FWD Run Command
REV Run Command
Forward
Acceleration
t
t
t
Reverse
Acceleration C2-01
C2-02
Output Frequency
TIME