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 8-3
Parameter
Parameter
Setting
P1115
Selection between simple ramp-function generator and extended ramp-function
generator
p1120
Ramp-function generator ramp-up time
p1121
Ramp-function generator ramp-down time
p1130
Ramp-function generator initial rounding-off time
p1131
Ramp-function generator final rounding-off time
p1135
OFF3 ramp-down time
p1136
OFF3 initial rounding-off time
p1137
OFF3 final rounding-off time
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.
8.5.1.2
Vector control
Properties of vector control
Vector control has the following properties and features:
● Stability during load and setpoint changes.
● Extremely good control characteristic thanks to short rise times for setpoint changes.
● Very good response to disturbances thanks to short settling times for load changes.
● Acceleration and braking are possible with maximum available torque.
● Motor protection due to variable torque limitation in motor and regenerative mode.
● Drive and braking torque controlled independently of the speed.
These benefits can even be achieved without speed feedback.
Note
Vector control can be used with or without an encoder.
Operation
8.5 Functions
SINAMICS SM150 6SL3810-7NN38-0AA1
114
Operating Instructions Rev.201910281406 EXAMPLE
