Siemens SINAMICS G120 Manual page 169

p1245[0...n] Vdc_min controller switch-in level (kinetic buffering) / Vdc_min on_level
PM240 Access level: 3
Can be changed: U, T
Units group: -
Min
65 [%]
Description: Sets the switch-in level for the Vdc-min controller (kinetic buffering).
The value is obtained as follows:
r1246[V] = p1245[%] * sqrt(2) * p0210
Dependency: Refer to: p0210
Warning: An excessively high value may adversely affect normal drive operation.
r1246 Vdc_min controller switch-in level (kinetic buffering) / Vdc_min on_level
PM230 Access level: 3
PM240
Can be changed: -
Units group: -
Min
- [V]
Description: Displays the switch-in level for the Vdc_min controller (kinetic buffering).
Note: The Vdc_min controller is not switched back off until the DC-link voltage rises above the threshold 1.05 * p1246 and
the controller output is zero.
p1247[0...n] Vdc_min controller dynamic factor (kinetic buffering) / Vdc_min dyn_factor
PM230 Access level: 3
PM240
Can be changed: U, T
Units group: -
Min
1 [%]
Description: Sets the dynamic factor for the Vdc_min controller (kinetic buffering).
100% means that p1250, p1251, and p1252 (gain, integral time, and rate time) are used corresponding to their
basic settings and based on a theoretical controller optimization.
If subsequent optimization is required, this can be carried out using the dynamic factor. In this case p1250, p1251,
p1252 are weighted with the dynamic factor p1247.
p1249[0...n] Vdc_max controller speed threshold / Vdc_max n_thresh
PM230 Access level: 3
PM240
Can be changed: U, T
Units group: 3_1
Min
0.00 [rpm]
Description: Sets the lower speed threshold for the Vdc_max controller. When this speed threshold is undershot, the Vdc_max
control is switched out and the speed is controlled using the ramp-function generator.
Note: For fast braking where the ramp-function generator tracking was active, it is possible to prevent the drive rotating in
the opposite direction by increasing the speed threshold and setting a final rounding-off time in the ramp-function
generator (p1131). This is supported using a dynamic setting of the speed controller.
© Siemens AG 2011 All Rights Reserved
SINAMICS G120 Control Units CU230P-2 Parameter Manual (LH9), 01/2011
Calculated: -
Scaling: -
Unit selection: -
Max
150 [%]
Calculated: -
Scaling: p2001
Unit selection: -
Max
- [V]
Calculated: p0340 = 1,3,4
Scaling: -
Unit selection: -
Max
10000 [%]
Calculated: p0340 = 1
Scaling: -
Unit selection: p0505
Max
210000.00 [rpm]
Parameters
List of Parameters
Data type: FloatingPoint32
Data set: DDS, p0180
Factory setting
76 [%]
Data type: FloatingPoint32
Data set: -
Factory setting
- [V]
Data type: FloatingPoint32
Data set: DDS, p0180
Factory setting
300 [%]
Data type: FloatingPoint32
Data set: DDS, p0180
Factory setting
10.00 [rpm]
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