Siemens SINAMICS G120X - Ramp-Function Generator Ramp-Down Time; RFG Ramp-Down Time

Note
The ramp-up time can be scaled via connector input p1138.
The parameter is adapted during the rotating measurement (p1960 > 0). This is the reason that during the rotating
measurement, the motor can accelerate faster than was originally parameterized.
For U/f control and sensorless vector control (see p1300), a ramp-up time of 0 s does not make sense. The setting
should be based on the startup times (r0345) of the motor.
p1120[0...n] Ramp-function generator ramp-up time / RFG ramp-up time
G120X_DP (PM330),
G120X_PN (PM330),
G120X_USS (PM330)
Access level: 1 Calculated: - Data type: FloatingPoint32
Can be changed: C2(1), T, U Scaling: - Dynamic index: DDS, p0180
Unit group: - Unit selection: - Function diagram: 3070
Min:
0.000 [s]
Max:
999999.000 [s]
Factory setting:
20.000 [s]
Description: The ramp-function generator ramps-up the speed setpoint from standstill (setpoint = 0) up to the maximum speed
(p1082) in this time.
Dependency: See also: p1082, p1123
Note
The ramp-up time can be scaled via connector input p1138.
The parameter is adapted during the rotating measurement (p1960 > 0). This is the reason that during the rotating
measurement, the motor can accelerate faster than was originally parameterized.
For U/f control and sensorless vector control (see p1300), a ramp-up time of 0 s does not make sense. The setting
should be based on the startup times (r0345) of the motor.
p1121[0...n] Ramp-function generator ramp-down time / RFG ramp-down time
Access level: 1 Calculated: - Data type: FloatingPoint32
Can be changed: C2(1), T, U Scaling: - Dynamic index: DDS, p0180
Unit group: - Unit selection: - Function diagram: 3070
Min:
0.000 [s]
Max:
999999.000 [s]
Factory setting:
10.000 [s]
Description: Sets the ramp-down time for the ramp-function generator.
The ramp-function generator ramps-down the speed setpoint from the maximum speed (p1082) down to standstill
(setpoint = 0) in this time.
Further, the ramp-down time is always effective for OFF1.
Dependency: See also: p1082, p1127
Note
For U/f control and sensorless vector control (see p1300), a ramp-down time of 0 s does not make sense. The setting
should be based on the startup times (r0345) of the motor.
p1121[0...n] Ramp-function generator ramp-down time / RFG ramp-down time
G120X_DP (PM330),
G120X_PN (PM330),
G120X_USS (PM330)
Access level: 1 Calculated: - Data type: FloatingPoint32
Can be changed: C2(1), T, U Scaling: - Dynamic index: DDS, p0180
Unit group: - Unit selection: - Function diagram: 3070
Min:
0.000 [s]
Max:
999999.000 [s]
Factory setting:
30.000 [s]
Description: Sets the ramp-down time for the ramp-function generator.
The ramp-function generator ramps-down the speed setpoint from the maximum speed (p1082) down to standstill
(setpoint = 0) in this time.
Further, the ramp-down time is always effective for OFF1.
Dependency: The parameter is pre-assigned depending on the size of the power unit.
See also: p1082, p1127
Parameters
7.2 Parameter list
SINAMICS G120X converter
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC 633