Siemens Sinamics S120 Function Manual page 67

● Select ramp-function generator rounding type p1134[0...n]
● Ramp function generator configuration, deactivate rounding at zero point p1151[0...n]
● Freezing of the ramp-function generator using p1141 (not in jog mode r0046.31 = 1)
Scaling of the up ramp and the down ramp
In order to being able to enter the parameters for the ramp-up times of p1120 and p1121 to
cyclic PROFIdrive telegrams, they are scalable.
● Using p1138[0...n], the signal source for scaling the ramp-up time p1120[0...n] of the
● Using p1139[0...n], the signal source for scaling the ramp-down time p1121[0...n] of the
The ramp times can be changed independently of one another in a cyclic PROFIdrive
telegram. If the ramp-up time and the ramp-down time are to be changed together, then the
scaling factor transferred in the PROFIdrive telegram is connected to both connectors.
Override of the ramp-function generator
● Down ramp for Safety Integrated functions:
● Down ramp for ESR:
Ramp-function generator tracking
If the drive is in the area of the torque limits, the actual speed value is removed from the
speed setpoint. The ramp-function generator tracking updates the speed setpoint in line with
the actual speed value and so levels the ramp. Using p1145 = 0, ramp-function generator
tracking can be deactivated, or with p1145 > 1, the permissible following error can be set.
Once the permissible following error has been reached, the speed setpoint at the ramp-
function generator output is only further increased in proportion to the speed setpoint.
Ramp-function generator tracking can be activated for the basic and the extended ramp-
function generators.
Drive functions
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
– p1134 = "0": continuous smoothing; rounding is always active. Overshoots can occur.
If the setpoint changes, final rounding is carried out and then the direction of the new
setpoint is adopted.
– p1134 = "1": discontinuous smoothing; for a setpoint change, the change is
immediately made to the direction of the new setpoint.
ramp-function generator is set.
ramp-function generator is set.
If Safety Integrated functions are activated and the down ramp is monitored, only the
OFF3 ramp according to p1135 is effective. The speed setpoint limit is selected using
p1051/p1052.
If ESR is activated, p0893 is used to enter the setpoint for the end speed of the ramp-
function generator. Instead of the ramp time of the ramp-function generator, ramp down is
controlled using the OFF3 ramp.
Extended setpoint channel
2.9 Ramp-function generator
65