Siemens SINAMICS G120 Manual page 167

p1240[0...n] Vdc controller or Vdc monitoring configuration (vector control) / Vdc_ctr config vec
PM230 Access level: 3
Can be changed: U, T
Units group: -
Min
0
Description: Sets the controller configuration of the DC link voltage (Vdc controller) in the closed-loop control mode. For U/f con-
trol: see p1280.
Value: 0:
1:
3:
Dependency: Refer to: p1245
Refer to: A07400, A07401, A07402, F07405, F07406
Notice: An excessively high value in p1245 can possibly negatively influence the normal operation of the drive.
Note: p1240 = 1, 3:
When the DC link voltage limit specified for the power unit is reached the following applies:
- the Vdc_max controller limits the regenerative energy in order that the DC link voltage is kept below the maximum
DC link voltage when braking.
- the ramp-down times are automatically increased. If overvoltage faults occur in spite of the Vdc_max controller
being active, the ramp-down time in p1121 might need to be increased.
- set the input voltage p0210 as low as possible in line with the supply voltage (in so doing avoid A07401).
p1240 = 3:
When the switch-in threshold of the Vdc_min controller is reached (p1245), the following applies:
- the Vdc_min controller limits the energy taken from the DC link in order to keep the DC link voltage above the min-
imum DC link voltage when accelerating.
- the motor is braked in order to use its kinetic energy to buffer the DC link.
p1240[0...n] Vdc controller or Vdc monitoring configuration (vector control) / Vdc_ctr config vec
PM240 Access level: 3
Can be changed: U, T
Units group: -
Min
0
Description: Sets the controller configuration of the DC link voltage (Vdc controller) in the closed-loop control mode. For U/f con-
trol: see p1280.
Value: 0:
1:
2:
3:
Dependency: Refer to: p1245
Refer to: A07400, A07401, A07402, F07405, F07406
Notice: An excessively high value in p1245 can possibly negatively influence the normal operation of the drive.
Note: p1240 = 1, 3:
When the DC link voltage limit specified for the power unit is reached the following applies:
- the Vdc_max controller limits the regenerative energy in order that the DC link voltage is kept below the maximum
DC link voltage when braking.
- the ramp-down times are automatically increased.
p1240 = 2, 3:
When the switch-in threshold of the Vdc_min controller is reached (p1245), the following applies:
- the Vdc_min controller limits the energy taken from the DC link in order to keep the DC link voltage above the min-
imum DC link voltage when accelerating.
- the motor is braked in order to use its kinetic energy to buffer the DC link.
© Siemens AG 2011 All Rights Reserved
SINAMICS G120 Control Units CU230P-2 Parameter Manual (LH9), 01/2011
Inhib Vdc ctrl
Vdc_max controller enable
Vdc_min controller and 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
Calculated: -
Scaling: -
Unit selection: -
Max
3
Calculated: -
Scaling: -
Unit selection: -
Max
3
Parameters
List of Parameters
Data type: Integer16
Data set: DDS, p0180
Factory setting
1
Data type: Integer16
Data set: DDS, p0180
Factory setting
1
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