Siemens CU240B-2 Parameter Manual page 182

Parameters
List of Parameters
p1280[0...n] Vdc controller or Vdc monitoring configuration (U/f) / Vdc_ctr config U/f
PM230 Access level: 3
Can be changed: U, T
Units group: -
Min
0
Description: Sets the configuration of the controller for the DC link voltage (Vdc controller) in the U/f operating mode.
Value: 0:
1:
Note: For high input voltages (see p0210), the following settings can improve the degree of ruggedness of the Vdc_max
controller:
- Set the input voltage p0210 as low as possible (in so doing avoid A07401).
- Set the rounding times (p1130, p1136).
- Increase the ramp-down times (p1121).
- Reduce the integral time of the controller (p1291) (factor 0.5).
- Activate the Vdc correction in the current controller (p1810 bit 1 = 1) or reduce the derivative action time of the
controller (p1292) (factor 0.5).
In this case, we always recommend using vector control (p1300 = 20) (Vdc controller, see p1240).
p1280[0...n] Vdc controller or Vdc monitoring configuration (U/f) / Vdc_ctr config U/f
PM240 Access level: 3
Can be changed: U, T
Units group: -
Min
0
Description: Sets the configuration of the controller for the DC link voltage (Vdc controller) in the U/f operating mode.
Value: 0:
1:
2:
3:
Note: For high input voltages (see p0210), the following settings can improve the degree of ruggedness of the Vdc_max
controller:
- Set the input voltage p0210 as low as possible (in so doing avoid A07401).
- Set the rounding times (p1130, p1136).
- Increase the ramp-down times (p1121).
- Reduce the integral time of the controller (p1291) (factor 0.5).
- Activate the Vdc correction in the current controller (p1810 bit 1 = 1) or reduce the derivative action time of the
controller (p1292) (factor 0.5).
In this case, we generally recommend to use vector control (p1300 = 20) (Vdc controller, see p1240).
The following measures are suitable to improve the Vdc_min controller:
- Optimize the Vdc_min controller (see p1287).
- Activate the Vdc correction in the current controller (p1810 bit 1 = 1).
1-182
Inhib Vdc ctrl
Vdc_max controller enable
Inhib Vdc ctrl
Vdc_max controller enable
Vdc_min controller (kinetic buffering) enable
Vdc_min controller and Vdc_max controller enable
SINAMICS G120 / Control Units CU240B/E-2 Parameter Manual (LH11), 01/2011
Calculated: -
Scaling: -
Unit selection: -
Max
1
Calculated: -
Scaling: -
Unit selection: -
Max
3
Data type: Integer16
Data set: DDS, p0180
Factory setting
1
Data type: Integer16
Data set: DDS, p0180
Factory setting
1
© Siemens AG 2011 All Rights Reserved