Parameter list
8.2 Parameter list
SINAMICS V20 Converter
266 Operating Instructions, 10/2019, A5E34559884-012
P1247[0...2]
Dynamic factor of
kinetic buffering [%]
10 - 200 100 U, T - DDS U16 3
Enters dynamic factor for kinetic buffering (KIB, Vdc_min controller). P1247 = 100 % means P1250, P1251
and P1252 (gain, integration time and differential time) are used as set. Otherwise, these are multiplied by
P1247 (dynamic factor of Vdc_min).
Vdc controller adjustment is calculated automatically from motor and converter data.
0.00 - 10.00
Enters gain for Vdc controller.
P1251[0...2]
Integration time Vdc
controller [ms]
0.1 - 1000.0 40.0 U, T - DDS Float 3
Enters integral time constant for Vdc controller.
P1252[0...2]
Differential time Vdc
controller [ms]
0.0 - 1000.0 1.0 U, T - DDS Float 3
Enters differential time constant for Vdc controller.
P1253[0...2]
Vdc controller output
limitation [Hz]
0.00 - 550.00 10.00 U, T - DDS Float 3
Limits maximum effect of Vdc_max controller.
This parameter is influenced by automatic calculations defined by P0340.
The Factory setting depends on converter power.
P1254
Auto detect Vdc
switch-on levels
0 - 1 1 C, T - - U16 3
Enables/disables auto-detection of switch-on levels for Vdc_max controller. For best results, it is recom-
mended to set P1254 = 1 (auto-detection of Vdc switch-on levels enabled). Setting P1254 = 0 is only rec-
ommended when there is a high degree of fluctuation of the DC-link when the motor is being driven. Note
that the auto detection only works when the converter has been in standby for over 20s.
P1256[0...2]
Reaction of kinetic
buffering
0 - 2 0 C, T - DDS U16 3
Enters reaction for kinetic buffering controller (Vdc_min controller). Depending on the setting selected, the
frequency limit defined in P1257 is used to either hold the speed or disable pulses. If not enough regenera-
tion is produced, converter may trip with undervoltage.
Maintain DC-link until trip
Maintain DC-link until trip/stop
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