Technical data

Drive functions
7.3 Function modules
Function Manual
Function Manual, 06/2012, 6SL3097-4AB10-0BP4
285
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.
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Figure 7-66 Ramp-function generator tracking
Without ramp-function generator tracking
● p1145 = 0
● Drive accelerates until t2 although setpoint < actual value
With ramp-function generator tracking
● At p1145 > 1 (values between 0 and 1 are not applicable), ramp-function generator
tracking is activated when the torque limit is approached. The ramp-function generator
output thereby only exceeds the actual speed value by a deviation value that can be
defined in p1145.
● t1 and t2 almost identical
Function diagrams (see SINAMICS S110 List Manual)
● 1550 Setpoint channel
● 3060 Basic ramp-function generator
● 3070 Extended ramp-function generator
● 3080 Ramp-function generator selection, status word, tracking