Siemens SINAMICS S120 Function Manual page 77

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Scaling of the up ramp and the down ramp

In order to be able to influence the ramp times set in parameters p1120 and p1121 cyclically via

PROFIdrive telegrams, scaling is available for the ramp times.

● Using p1138[0...n], the signal source for scaling the ramp-up time p1120[0...n] of the ramp-

function generator is set.

● Using p1139[0...n], the signal source for scaling the ramp-down time p1121[0...n] of the

ramp-function generator is set.

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.

The scaling also affects the initial and final rounding. However, it does not have the same effect

as in the acceleration ramp. This is the reason why an incorrect effective ramp-up time is

displayed. With scaling of approx. 50% to 200%, you get the most accurate effective ramp-up

Override of the ramp-function generator

● Down ramp for Safety Integrated functions:

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/

● Down ramp for the "Extended stop and retract" function module (ESR):

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.

Drive functions

Function Manual, 06/2019, 6SL3097-5AB00-0BP2

Extended ramp-function generator

Extended setpoint channel

4.5 Ramp-function generator