Siemens SINAMICS G120 - p1256[0...n] Vdc_min controller response (kinetic buffering); Vdc_min response; p1257[0...n] Vdc_min controller speed threshold; Vdc_min n_thresh; r1258 CO: Vdc controller output; Vdc_ctrl output; p1271[0...n] Flying restart maximum frequency for the inhibited direction; FlyRes f_max dir

SINAMICS G120 Control Units CU240B-2/CU240E-2
List Manual (LH11), 01/2016, A5E33839529
193
2 Parameters
2.2 List of parameters
Description: Sets the response for the Vdc_min controller (kinetic buffering).
Value: 0: Buffer Vdc until undervoltage, n<p1257 -> F07405
1: Buff. Vdc until undervolt., n<p1257 -> F07405, t>p1255 -> F07406
Dependency: Not visible with application class: "Standard Drive Control" (SDC, p0096 = 1)
Refer to: F07405, F07406
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.
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 pre-control 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.
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).
p1256[0...n] Vdc_min controller response (kinetic buffering) / Vdc_min response
PM230
PM230_STO
PM240
Access level: 3 Calculated: - Data type: Integer16
Can be changed: U, T Scaling: - Dyn. index: DDS, p0180
Unit group: - Unit selection: - Func. diagram: -
Min Max Factory setting
0 1 0
p1257[0...n] Vdc_min controller speed threshold / Vdc_min n_thresh
PM230
PM230_STO
PM240
Access level: 3 Calculated: p0340 = 1 Data type: FloatingPoint32
Can be changed: U, T Scaling: - Dyn. index: DDS, p0180
Unit group: 3_1 Unit selection: p0505 Func. diagram: -
Min Max Factory setting
0.00 [rpm] 210000.00 [rpm] 50.00 [rpm]
r1258 CO: Vdc controller output / Vdc_ctrl output
PM230
PM230_STO
PM240
Access level: 3 Calculated: - Data type: FloatingPoint32
Can be changed: - Scaling: p2002 Dyn. index: -
Unit group: 6_2 Unit selection: p0505 Func. diagram: 6220
Min Max Factory setting
- [Arms] - [Arms] - [Arms]
p1271[0...n] Flying restart maximum frequency for the inhibited direction / FlyRes f_max dir
Access level: 3 Calculated: - Data type: FloatingPoint32
Can be changed: U, T Scaling: - Dyn. index: DDS, p0180
Unit group: - Unit selection: - Func. diagram: -
Min Max Factory setting
0 [Hz] 650 [Hz] 0 [Hz]