Table 8-4 Parameter - Siemens 6SL3845-2NN41-8AD2 Operating Instructions Manual

Operation
8.5 Functions
The ramp-up and ramp-down times each refer to the maximum speed (p1082).
Note
If rounding times are too long, this can cause the setpoint to be overshot if the setpoint is
reduced abruptly during ramp-up.
Rounding is also effective in the zero crossover;
When the rotational direction is reversed, the ramp-function generator output is reduced to zero
using the following parameters:
● The initial rounding
● The ramp-down time
● The final rounding
The new inverted setpoint is approached using the following parameters:
● The initial rounding
● The ramp-up time
● The final rounding
Rounding times that can be set separately are active in the event of a fast stop (OFF3). The
actual ramp-up/ramp-down times increase with active rounding.
Table 8-4
Parameter
P1115
p1120
p1121
p1130
p1131
p1135
p1136
p1137
Note
The effective ramp-up time increases when you enter an initial and final rounding-off time.
Effective ramp-up time = p1120 + (0.5 x p1130) + (0.5 x p1131)
You can find additional information in function diagrams 3060 and 3070.
102
Parameter
Setting
Selection between simple ramp-function generator and extended ramp-function
generator
Ramp-function generator ramp-up time
Ramp-function generator ramp-down time
Ramp-function generator initial rounding-off time
Ramp-function generator final rounding-off time
OFF3 ramp-down time
OFF3 initial rounding-off time
OFF3 final rounding-off time
SINAMICS SM150 6SL3845-2NN41-8AD2
Operating Instructions Rev.201910281310 EXAMPLE