Maximum Speed; Ramp-Function Generator - Siemens SINAMICS G120 Operating Instructions Manual

8.4.5

Maximum speed

Function
The maximum speed limits the speed
setpoint range for both directions of
rotation.
The inverter generates a message (fault or
alarm) when the maximum speed is
exceeded.
If you must limit the speed depending on the direction of rotation, then you can define speed
limits for each direction.
Table 8- 18
Parameter
p1082
p1083
p1086
8.4.6

Ramp-function generator

The ramp-function generator in the setpoint channel limits the rate that the speed setpoint
changes. As a consequence the motor accelerates and brakes more softly, reducing the
stress on the mechanical system of the driven machine.
You can select between two different ramp-function generator types:
● Extended ramp-function generator
● Basic ramp-function generator
Converter with the CU250S-2 Control Unit (vector)
Operating Instructions, 06/2013, FW V4.6, A5E31759476B AB
Parameters for minimum and maximum speed
Description
Maximum speed (factory setting: 1500 rpm)
Speed limit, positive direction of rotation (factory setting: 210,000 rpm)
Speed limit, negative direction of rotation (factory setting: -210,000 rpm)
The extended ramp-function generator limits acceleration and jerk.
The basic ramp-function generator limits the acceleration, however not the rate the
acceleration changes (jerk).
Setting functions
8.4 Setpoint calculation
237