Efficient Networks Siemens Sinamics S120 - Manual (Page 60)

Extended setpoint channel
2.9 Ramp-function generator
Drive Functions
60
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
● p1088[C] DI: Speed limit negative direction of rotation
● r1119 Ramp-function generator setpoint at the input
Suppression bandwidths
● p1091[D] Suppression speed 1
● ...
● p1094[D] Suppression speed 4
● p1101[D] Suppression speed bandwidth
Parameterization with STARTER
The "speed limitation" parameter screen is selected by activating the following icon in toolbar
of the STARTER commissioning tool:
Figure 2-8 STARTER icon for "speed limitation"
2.9 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[DDS] and ramp-down time p1121[DDS] can be used to set an acceleration ramp and
a deceleration ramp independently of each other. This allows a controlled transition to be
made in the event of setpoint changes.
The maximum speed p1082[DDS] 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
fast stop (OFF3), e.g. for rapid controlled deceleration when an emergency stop button is
pressed.
There are two types of ramp function generator:
● Simple ramp function generator with
– Acceleration and deceleration ramps
– Ramp for fast stop (OFF3)
– Tracking can be selected via a binector input
– Setting values for the ramp function generator
● Extended ramp function generator also has
– Initial and final rounding off
Note
The ramp function generator cannot be frozen (via p1141) in jog mode (r0046.31 = 1).