Siemens SINAMICS G115D - Page 274

Parameter Description Setting
p1131[0...n] Ramp-function generator, 󹪝nal
rounding-o󹪜 time [s]
Sets the 󹪝nal rounding-o󹪜 time for the extended
ramp generator.
Factory setting: 0
p1134[0...n] Ramp-function generator, round‐
ing-o󹪜 type
Sets the smoothed response to the OFF1 command
or the reduced setpoint for the extended ramp-
function generator.
0: Continuous smoothing (factory setting)
1: Discontinuous smoothing
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W
W
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p1135[0...n] OFF3 ramp-down time [s] Sets the ramp-down time from the maximum
speed down to zero speed for the OFF3 command.
Factory setting: 0
p1136[0...n] OFF3 initial rounding-o󹪜 time [s] Sets the initial rounding-o󹪜 time for OFF3 for the
extended ramp generator.
Factory setting: 0
p1137[0...n] OFF3 󹪝nal rounding-o󹪜 time [s] Sets the 󹪝nal rounding-o󹪜 time for OFF3 for the
extended ramp generator.
Factory setting: 0
You can 󹪝nd more information in function diagram 3070 and in the parameter list of the List
Manual.
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 the case of a permanent magnet synchronous motor, initial rounding can prevent the
motor from tilting during startup.
– In most applications, it is su󹪟cient when the 󹪝nal rounding is set to the same value as the
initial rounding.
Advanced commissioning
7.18Setpoint processing
SINAMICS G115D Wall Mounted distributed drive
272 Operating Instructions, 07/2023, FW V4.7 SP14, A5E52808211A AA