Function library
7-61
L
EDSVS9332P-D21 EN 3.0
7.5.9.2 S ramps (S profile)
Purpose
Protection from damage of the drive components by reducing the jerk during acceleration and
deceleration.
9300pos002
VTVEL =
+VTACC=
-VTACC=
Tra versing speed
Acceleration
Select deceleration
Fig. 7-29 S ramps (S profile)
1. Standstill 6. Deceleration with adjusted jerk
2. Deceleration with adjusted jerk 7. Deceleration with VTACC
3. Acceleration with VTACC 8. Reduce deceleration with adjusted jerk
4. Reduce accelera tion with adjusted jerk 9. Drive in targetposition
5. Traversing with VTVEL
•
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
= T
r
×
a
a
max
→ 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
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