Siemens SINAMICS G120XA - Setting the Extended Ramp-Function Generator; Additional Parameters to Set the Extended Ramp-Function Generator

Parameters
Table 6-51 Additional parameters to set the extended ramp-function generator
Number Name Factory setting
p1120[D] Ramp-function generator ramp-up time Dependent on the
converter
p1121[D] Ramp-function generator ramp-down time
p1130[D] Ramp-function generator initial rounding time
p1131[D] Ramp-function generator final rounding time
p1134[D] Ramp-function generator rounding type 0 (continuous
smoothing)
p1135[D] OFF3 ramp-down time Dependent on the
converter
p1136[D] OFF3 initial rounding time
p1137[D] OFF3 final rounding time 0 s
p1138[C] CI: Ramp-function generator ramp-up time scaling 1
p1139[C] CI: Ramp-function generator ramp-down time scaling 1
p1140[C] BI: Enable ramp-function generator/disable ramp-function
generator
Dependent on the
converter
p1141[C] BI: Continue ramp-function generator/freeze ramp-function
generator
p1142[C] BI: Enable setpoint/inhibit setpoint 1
p1143[C] BI: Accept ramp-function generator setting value 0
p1144[C] CI: Ramp-function generator setting value 0
p1148[D] Ramp-function generator tolerance for ramp-up and ramp-
down active
19.8 rpm
r1149 CO: Ramp-function generator acceleration -
Further information is provided in the parameter list.
Setting the extended ramp-function generator
Procedure
1. Enter the highest possible speed setpoint.
2. Switch on the motor.
3. Evaluate your drive response.
– If the motor accelerates too slowly, then reduce the ramp-up time.
An excessively short ramp-up time means that the motor will reach its current limiting
when accelerating, and will temporarily not be able to follow the speed setpoint. In this
case, the drive exceeds the set time.
– If the motor accelerates too fast, then extend the ramp-up time.
– Increase the initial rounding if the acceleration is jerky.
– In most applications, it is sufficient when the final rounding is set to the same value as the
initial rounding.
4. Switch off the motor.
Advanced commissioning
6.4 Setpoints and setpoint processing
SINAMICS G120XA converter
244 Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB