Siemens SINAMICS G120 List Manual page 227

p1256[0...n] Vdc_min controller response (kinetic buffering) / Vdc_min response
PM240 Access level: 3
Can be changed: U, T
Unit group: -
Min
0
Description: Sets the response for the Vdc_min controller (kinetic buffering).
Value: 0:
1:
Dependency: Not visible with application class: "Standard Drive Control" (SDC, p0096 = 1)
Refer to: F07405, F07406
p1257[0...n] Vdc_min controller speed threshold / Vdc_min n_thresh
PM240 Access level: 3
Can be changed: U, T
Unit group: 3_1
Min
0.00 [rpm]
Description: Sets the speed threshold for the Vdc-min controller (kinetic buffering).
If this value is exceeded a fault is output; the required response can be parameterized .
Kinetic buffering is not started below the speed threshold.
Dependency: Not visible with application class: "Standard Drive Control" (SDC, p0096 = 1)
Note: Exiting the Vdc_min control before reaching motor standstill prevents the regenerative braking current from
increasing significantly at low speeds, and after a pulse inhibit, means that the motor coasts down.
However, the maximum braking torque can be set via the appropriate torque limiting.
r1258 CO: Vdc controller output / Vdc_ctrl output
PM240 Access level: 3
Can be changed: -
Unit group: 6_2
Min
- [Arms]
Description: Displays the actual output of the Vdc controller (DC link voltage controller)
Dependency: Not visible with application class: "Standard Drive Control" (SDC, p0096 = 1)
Note: The regenerative power limit p1531 is used for vector control to precontrol the Vdc_max controller. The lower the
power limit is set, the lower the correction signals of the controller when the voltage limit is reached.
p1271[0...n] Flying restart maximum frequency for the inhibited direction / FlyRes f_max dir
Access level: 3
Can be changed: U, T
Unit group: -
Min
0 [Hz]
Description: Sets the maximum search frequency for a flying restart in an inhibited setpoint direction (p1110, p1111).
Note: The parameter has no effect for an operating mode, which only searches in the setpoint direction (p1200 > 3).
SINAMICS G120 CU250S-2 Control Units
List Manual, 09/2017, A5E33842890
Buffer Vdc until undervoltage, n<p1257 -> F07405
Buff. Vdc until undervolt., n<p1257 -> F07405, t>p1255 -> F07406
Calculated: -
Scaling: -
Unit selection: -
Max
1
Calculated: p0340 = 1
Scaling: -
Unit selection: p0505
Max
210000.00 [rpm]
Calculated: -
Scaling: p2002
Unit selection: p0505
Max
- [Arms]
Calculated: -
Scaling: -
Unit selection: -
Max
650 [Hz]
2 Parameters
2.2 List of parameters
Data type: Integer16
Dyn. index: DDS, p0180
Func. diagram: -
Factory setting
0
Data type: FloatingPoint32
Dyn. index: DDS, p0180
Func. diagram: -
Factory setting
50.00 [rpm]
Data type: FloatingPoint32
Dyn. index: -
Func. diagram: 6220
Factory setting
- [Arms]
Data type: FloatingPoint32
Dyn. index: DDS, p0180
Func. diagram: -
Factory setting
0 [Hz]
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