Siemens SINAMICS V20 Operating Instructions Manual page 252

Parameter list
8.2 Parameter list
Parameter Function
P1252[0...2] Differential time Vdc
controller [ms]
Enters differential time constant for Vdc controller.
P1253[0...2] Vdc controller output
limitation [Hz]
Limits maximum effect of Vdc_max controller.
Dependency: This parameter is influenced by automatic calculations defined by P0340.
Note: The Factory setting depends on inverter power.
P1254 Auto detect Vdc
switch-on levels
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 inverter has been in standby for over 20s.
0
1
Dependency: See P0210
P1256[0...2] Reaction of kinetic
buffering
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, inverter may trip with undervoltage.
0
1
2
Note: P1256 = 0:
Maintain DC-link voltage until mains is returned or inverter is tripped with undervoltage. The frequency is
kept above the frequency limit provided in P1257.
P1256 = 1:
Maintain DC-link voltage until mains is returned or inverter is tripped with undervoltage or pulses are disa-
bled when frequency falls below the limit in P1257.
P1256 = 2:
This option ramps down the frequency to standstill even when mains return.
If mains do not return, frequency brought down under the control of Vdc_min controller until P1257 limit.
Then pulses are disabled or undervoltage has occurred. If mains return, then an OFF1 is active until P1257
limit. Then pulses are disabled.
P1257[0...2] Frequency limit for
kinetic buffering [Hz]
Frequency which kinetic buffering (KIB) either hold speed or disable pulses depending on P1256.
P1300[0...2] Control mode
Parameter to select the control method. Controls relationship between speed of motor and voltage supplied
by inverter.
0
1
2
252
Range Factory
default
0.0 - 1000.0 1.0
0.00 - 550.00 10.00
0 - 1 1
Disabled
Enabled
0 - 2 0
Maintain DC-link until trip
Maintain DC-link until trip / stop
Control stop
0.00 - 550.00 2.50
0 - 19 0
V/f with linear characteristic
V/f with FCC
V/f with quadratic characteristic
Can be Scaling
changed
U, T -
U, T -
C, T -
C, T -
U, T -
C, T -
Operating Instructions, 11/2016, A5E34559884-006
Data Data Acc.
set type Level
DDS Float 3
DDS Float 3
- U16 3
DDS U16 3
DDS Float 3
DDS U16 2
SINAMICS V20 Inverter