Limits - Siemens SINAMICS S120 Function Manual

Function modules
7.9 Basic positioner
7.9.2

Limits

Description
The velocity, acceleration and deceleration can be limited and the software limit switches
and STOP cams set.
Features
● Traversing profile limits
● Traversing range limits
● Jerk limitation
Maximum velocity
The maximum velocity of an axis is defined using parameter p2571. The velocity should not
be set to be greater than the maximum speeds in r1084 and r1087.
The drive is limited to this velocity if a higher velocity is specified or programmed via the
override (p2646) for the reference point approach or is programmed in the traversing block.
Parameter p2571 (maximum velocity) defines the maximum traversing velocity in units 1000
LU/min. If the maximum velocity is changed, then this limits the velocity of a traversing task
that is presently being executed.
This limit is only effective in the positioning mode for:
● Jog mode
● Processing traversing blocks
● Direct setpoint input/MDI for positioning/setting-up
● Reference point approach
Maximum acceleration/deceleration
Parameter p2572 (maximum acceleration) and p2573 (maximum deceleration) define the
maximum acceleration and the maximum deceleration. In both cases, the units are 1000
LU/s
Both values are relevant for:
● Jog mode
● Processing traversing blocks
290
– Maximum velocity (p2571)
– Maximum acceleration (p2572) / maximum deceleration (p2573)
– Software limit switch (p2578, p2579, p2580, p2581, p2582)
– STOP cams (p2568, p2569, p2570)
– Jerk limitation (p2574)
– Activation of jerk limitation (p2575)
.
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Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
Drive functions