Vdc Controller Or Vdc Monitoring Configuration (U/F); Vdc_Max Controller Switch-In Level (U/F) / Vdc_Max On_Level - Siemens SINAMICS G150 Manual

p1280[0...n] Vdc controller or Vdc monitoring configuration (U/f) / Vdc_ctr config U/f
VECTOR_G Can be changed: U, T
Data type: Integer16
P-Group: Functions
Not for motor type: -
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:
4:
5:
6:
Warning: When the Vdc_max controller is active, the motor can be accelerated (e.g. by driving loads or as a result of high DC
link voltages). This can be caused by other drives that are operating on a common DC link busbar.
Caution: If several drives are operated from the same DC link busbar, then it is recommended that the Udc control is only
activated for the drives with relatively high moments of inertia.
If the Udc controls for various drives are simultaneously active, then they can mutually influence one another. In this
case, the controller dynamic performance should be reduced or the Udc control of individual drives should be
deactivated.
Drives with Udc control must be able to brake and accelerate independently of one another.
Note: Re p1280 = 4, 5, 6:
When the threshold in r1282 or r1286 is reached, the DC link voltage monitoring initiates a fault (F07403 or F07404)
with a response and therefore reduces additional negative effects on the DC link voltage.
If a braking resistor is connected to the DC link, then the Vdc_max control should be disabled.
Re p1280 = 1, 3:
Only U/f control: When the Vdc max controller is active, fault F07404 is initiated if the speed setpoint ramp is stopped
(held) longer than the time set in p1284.
r1282

Vdc_max controller switch-in level (U/f) / Vdc_max on_level

VECTOR_G Can be changed: -
Data type: FloatingPoint32
P-Group: Functions
Not for motor type: -
Min
- [V]
Description: Displays the switch-in level for the Vdc_max controller.
If p1294 = 0 (automatic sensing of the switch-in level = off), then the following applies:
AC/AC device: r1282 = 1.15 * sqrt(2) * p0210
DC/AC device: r1282 = 1.15 * p0210
If p1294 = 1 (automatic sensing of the switch-in level = on), then the following applies:
r1282 = Vdc_max - 50.0 V (Vdc_max: Overvoltage threshold of the power unit)
r1282 = Vdc_max - 25.0 V (for 230 V power units)
Notice: If the activation level of the Vdc_max controller is already exceeded in the deactivated state (pulse inhibit) by the DC
link voltage, then the controller can be automatically deactivated (see F07401), so that the drive is not accelerated
the next time that it is activated.
Note: The Vdc_max controller is not switched back off until the DC-link voltage falls below the threshold 0.95 * r1282 and
the controller output is zero.
SINAMICS G130/G150
List Manual (LH2), 04/2014, A5E03263479A
Inhib Vdc ctrl
Enable Vdc_max controller
Enable Vdc_min controller (kinetic buffering)
Enable Vdc_min controller and Vdc_max controller
Activate Vdc_max monitoring
Activate Vdc_min monitoring
Activate Vdc_min monitoring and Vdc_max monitoring
Calculated: -
Dyn. index: DDS, p0180
Units group: -
Scaling: -
Max
6
Calculated: -
Dyn. index: -
Units group: -
Scaling: p2001
Max
- [V]
2 Parameters
2.2 List of parameters
Access level: 3
Func. diagram: 6300, 6320
Unit selection: -
Expert list: 1
Factory setting
1
Access level: 3
Func. diagram: 6320
Unit selection: -
Expert list: 1
Factory setting
- [V]
343