Ramp-Function Generator - Siemens Sinamics S110 Function Manual

Drive functions
7.3 Function modules
7.3.7.9

Ramp-function generator

Description
The ramp-function generator is used to limit acceleration in the event of abrupt setpoint
changes, which helps prevent load surges throughout the drive train. The ramp-up time
p1120[D] and ramp-down time p1121[D] can be used to set mutually independent
acceleration and deceleration ramps. This allows a controlled transition to be made in the
event of setpoint changes.
The maximum speed p1082[D] is used as a reference value for calculating the ramps from
the ramp-up and ramp-down times. A special adjustable ramp can be set via p1135 for quick
stop (OFF3), e.g. for rapid controlled deceleration when an emergency OFF button is
pressed.
There are two types of ramp-function generator:
● Basic ramp-function generator with
● Extended ramp-function generator also has
Properties of the basic ramp-function generator
Figure 7-62
● RFG ramp-up time Tup p1120[D]
● RFG ramp-down time Tdn p1121[D]
266
– Acceleration and deceleration ramps
– Ramp for quick stop (OFF3)
– Tracking can be selected via a binector input
– Setting values for the ramp-function generator
– Initial and final rounding off
Note
The ramp-function generator cannot be frozen (via p1141) in jog mode (r0046.31 = 1).
Ramp-up and ramp-down with the basic ramp-function generator
Function Manual, 10/2008, 6SL3097-4AB10-0BP0
Drive functions