abc 2000 Series User Manual page 43

2: S-curve acceleration/deceleration B
In this curve, the rated motor frequency is always the inflexion point.
This mode is fb usually used in applications where acceleration/
deceleration is required at the speed higher than the rated
frequency.
When the set frequency is higher than the rated frequency, the
accelerationldeoo!eration time is:
In the formula,f is the set frequency,fb is the rated motor frequency
and T is the acceleration time from 0
<Mpu t - (llz )
Fi g ura 4-1 S�
11me proporti o n
Smcurve start segment
P1.08
Setti n g Range
11me proporti o n
S-wrve end segment
P1.09
Setti n g Range
These two para.meters respectively define the time proportions of
the start segment and the end segment of S-curve acceleration/
deceleration A. They must satisfy the requirement:
PL08 + P1.09
In Figure 4-2, t1 is the time defined in P1 .08, within which the slope
of the output frequency change Increases gradually.
defined in P1 .09, within which the slope of the output frequency
change gradually decreases to 0. Within the time between t1 and
the slope of the output frequency change remains unchanged, that
is, linear accelarationldecelera.tion.
t = (.:!.* ( l ) + 1) *
9
t--1
� rve accal e rati o n/decel e ra
of
of
<
1 00.0%.
J. 9
to the rated frequency
Hz
Defaul t 1 3 0. 0 ll'J .4
0. 0 %-(100. 0 %-P1 . 0 9)
Defaul t i a o. O il'J .4
0. 0 %-(100. 0 %-P1 . 0 8)
T
--a Time (t)
tf o n
B
t2
is the time
tb.
t2,