Lenze L-force HighLine C 8400 Series Reference Manual page 524

8400 HighLine C | Reference manual
Basic drive functions (MCK)
Positioning
Symbol Profile parameter
Speed (C01302/1...15)
B
Maximum speed at which the target is to be approached.
• Depending on the profile parameters of position, acceleration and deceleration , it is possible that
v [m/s]
v
Acceleration (C01303/1...15)
C
Stipulation of the change in speed at which maximum acceleration is to take place.
• Two types of acceleration are distinguished:
v [m/s]
v
v [m/s]
v
Deceleration (C01304/1...15)
D
Stipulation of the change in speed at which maximum deceleration to a standstill is to take place.
S-ramp time (C01305/1...15)
E
Due to stipulation of an S-ramp time for a profile, the profile is executed with S-shaped ramps, i.e.
acceleration and braking processes are initiated smoothly in order to reduce jerk and thus the stress on
the drive components.
• The acceleration/deceleration stipulated in the profile is not achieved until after the specified S-
• This kind of acceleration/deceleration is needed for sensitive machine parts with a certain amount
• The unavoidable consequence of the slower increase in acceleration in the case of the S profile is that
S-ramp time for jerk limitation ( 528)
v [m/s]
524
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the drive will not even reach the maximum speed. In this case, the graphic representation will be a
trapezium instead of a triangle:

pos
Œ Ž
– Constant acceleration: the speed increases linearly.
– Linearly increasing acceleration: Speed increases in S-shape.
A linearly increasing acceleration (S-profile) results from the setting of an S-ramp time (see more
below).
pos
Œ
pos

ramp time.
of play.
the positioning time is longer compared to the L profile, which is more efficient in terms of time.
Œ

Œ

a
L
Acceleration
Travelling speed (is not reached in this case)
Deceleration
Target position (or traversing distance)

t [s]
Constant acceleration (L-profile)
Linearly increasing acceleration (S-profile)
t [s]
t [s]
Without jerk limitation (L profile)
With jerk limitation (S profile)
t [s]
t [s]
Firmware ≤ 11.00 - DMS 6.0 EN - 10/2011