Siemens CU240B-2 Parameter Manual page 178

Parameters
List of Parameters
r1242 Vdc_max controller switch-in level / Vdc_max on_level
PM230 Access level: 3
PM240
Can be changed: -
Units group: -
Min
- [V]
Description: Displays the switch-in level for the Vdc_max controller.
If p1254 = 0 (automatic sensing of the switch-in level = off), then the following applies:
r1242 = 1.15 * sqrt(2) * V_mains = 1.15 * sqrt(2) * p0210 (supply voltage)
PM230: r1242 is limited to Vdc_max - 50.0 V.
If p1254 = 1 (automatic sensing of the switch-in level = on), then the following applies:
r1242 = Vdc_max - 50.0 V (Vdc_max: Overvoltage threshold of the power unit)
Note: The Vdc_max controller is not switched back off until the DC-link voltage falls below the threshold 0.95 * p1242 and
the controller output is zero.
p1243[0...n] Vdc_max controller dynamic factor / Vdc_max dyn_factor
PM230 Access level: 3
PM240
Can be changed: U, T
Units group: -
Min
1 [%]
Description: Sets the dynamic factor for the DC link voltage controller (Vdc_max controller).
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 p1243.
p1245[0...n] Vdc_min controller switch-in level (kinetic buffering) / Vdc_min on_level
PM230 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.
1-178
Calculated: -
Scaling: p2001
Unit selection: -
Max
- [V]
Calculated: p0340 = 1,3,4
Scaling: -
Unit selection: -
Max
10000 [%]
Calculated: -
Scaling: -
Unit selection: -
Max
150 [%]
SINAMICS G120 / Control Units CU240B/E-2 Parameter Manual (LH11), 01/2011
Data type: FloatingPoint32
Data set: -
Factory setting
- [V]
Data type: FloatingPoint32
Data set: DDS, p0180
Factory setting
100 [%]
Data type: FloatingPoint32
Data set: DDS, p0180
Factory setting
73 [%]
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