Siemens SINAMICS G120XA, Operating Instructions Manual

Page: 508 / 918

Note
For bit 00:
Deactivate the ramp-up for Vdc_min control.
For drives with a mechanical system that can oscillate and high moment of inertia, the speed can be more quickly
tracked.
For bit 02:
When the line supply returns, normal operation is resumed earlier, and the system does not wait until the Vdc min
controller reaches the setpoint speed.
r1282 Vdc_max controller switch-in level (U/f) / Vdc_max on_level
CUG120XA_USS
(Vdc_max)
Access level: 3 Calculated: - Data type: FloatingPoint32
Can be changed: - Scaling: p2001 Dynamic index: -
Unit group: - Unit selection: - Function diagram: 6320, 6854
Min:
- [V] Max:
- [V] Factory setting:
- [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:
r1282 = 1.15 * sqrt(2) * p0210 (supply voltage)
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.
p1283[0...n] Vdc_max controller dynamic factor (U/f) / Vdc_max dyn_factor
CUG120XA_USS
(Vdc_max)
Access level: 3 Calculated: CALC_MOD_CON Data type: FloatingPoint32
Can be changed: T, U Scaling: - Dynamic index: DDS, p0180
Unit group: - Unit selection: - Function diagram: 6320, 6854
Min:
1 [%] Max:
10000 [%] Factory setting:
100 [%]
Description: Sets the dynamic factor for the DC link voltage controller (Vdc_max controller).
100% means that p1290, p1291, and p1292 (gain, integral time, and rate time) are used in accordance with their basic
settings and on the basis of a theoretical controller optimization.
If subsequent optimization is required, this can be carried out using the dynamic factor. In this case, p1290, p1291, and
p1292 are weighted with the dynamic factor p1283.
p1284[0...n] Vdc_max controller time threshold (U/f) / Vdc_max t_thresh
Access level: 3 Calculated: CALC_MOD_ALL Data type: FloatingPoint32
Can be changed: T, U Scaling: - Dynamic index: DDS, p0180
Unit group: - Unit selection: - Function diagram: -
Min:
0.000 [s] Max:
300.000 [s] Factory setting:
4.000 [s]
Description: Sets the monitoring time for the Vdc_max controller.
If the down ramp of the speed setpoint is held for longer than the time set in p1284, then fault F07404 is output.
Parameters
7.3 Parameters
SINAMICS G120XA converter
506
Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB