Lenze EVS9328EP User Manual

Function library
Positioning control
3.4.9 Travel profile generator and setpoints
3−60
l
EDSVS9332P−EXT DE 2.0
3.4.9.2 S−shaped ramps (S profile)
Purpose
Protection from damage of the drive components by reducing the jerk during acceleration and
deceleration.
V
t
t
a
t
Ruck
1234 5 6 7 89
VTVEL
VTACC
VTACC
C1256 C1256
C1256 C1256
a
max
a
max
tr tr
tr
tr
9300pos002
VTVEL =
+ VTACC =
− VTACC =
Traversing speed
Acceleration
Deceleration
Fig. 3−23 S−shaped ramps (S profile)
1. Standstill 6. Deceleration with set jerk
2. Deceleration with set jerk 7. Deceleration with VTACC
3. Acceleration with VTACC 8. Reduce deceleration with set jerk
4. Reduce acceleration with set jerk 9. Drive in targetposition
5. Traversing with VTVEL
l
With the S profile acceleration and deceleration processes are started smoothly. The defined
acceleration is only reached at the end of the jerk time.
– A slower acceleration always leads to a longer positioning time − compared to the
time−optimised L profile.
– Set jerk time (T
r
) via C1256.
T
r
corresponds to the time when the max. acceleration a−max (C1250) is reached. The actual
jerk time tr decreases according to the actual accelerationa:
t
r
 + T
r

a
a
max
 ³ t
r
 + C1256
VTACC[%]
100%
– Reducing the jerk or increasing the jerk time (t
r(RED)
) can be set via the input
POS−JERK−RED" (default setting 100%).
t
r(RED)
 + t
r

100%
POS−JERK−RED

Lenze EVS9328EP Specifications

General

Brand	Lenze
Model	EVS9328EP
Category	Controller
Language	English