Siemens Sinamics S110 Function Manual page 268

Drive functions
7.3 Function modules
● Set ramp-function generator
● Select ramp-function generator rounding type p1134[D]
● Configure ramp-function generator, deactivate rounding at zero crossing p1151[D]
● Freezing of the ramp-function generator using p1141 (not in jog mode r0046.31 = 0)
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. p1145 can be used to deactivate ramp-
function generator tracking (p1145 = 0) or set the permissible following error (p1145 > 1). If
the permissible following error is reached, then the speed setpoint at the ramp-function
generator output will only be further increased in the same proportion as the actual speed
value.
Ramp-function generator tracking can be activated for the basic and the extended ramp-
function generators.
Figure 7-64 Ramp-function generator tracking
Without ramp-function generator tracking
● p1145 = 0
● Drive accelerates until t2 although setpoint < actual value
268
– Ramp-function generator setting value p1144[C]
– Set ramp-function generator signal p1143[C]
– p1134 = "0": continuous smoothing rounding is always active. Overshoots may occur.
If the setpoint changes, final rounding is carried out and then the direction of the new
setpoint is adopted.
– p1134 = "1": non-continuous smoothing changes immediately to the direction of the
new setpoint when the setpoint is changed.
Function Manual, 10/2008, 6SL3097-4AB10-0BP0
Drive functions