Vdc_Min Controller Response (Kinetic Buffering) / Vdc_Min Response; Vdc_Min Controller Speed Threshold / Vdc_Min N_Thresh; Co: Vdc Controller Output / Vdc_Ctrl Output; Bypass Configuration / Bypass Config - Siemens SINAMICS G120XA Operating Instructions Manual

Dependency: See also: F07406
NOTICE
If a time threshold has been parameterized, the Vdc_max controller should also be activated (p1240 = 3) so that the
drive does not shut down with overvoltage when Vdc_min control is exited (due to the time violation) and in the event
of fault response OFF3. It is also possible to increase the OFF3 ramp-down time p1135.
p1256[0...n]

Vdc_min controller response (kinetic buffering) / Vdc_min response

CUG120XA_USS Access level: 3
(Vdc_min)
Can be changed: T, U
Unit group: -
Min:
0
Description: Sets the response for the Vdc_min controller (kinetic buffering).
Value: 0:
1:
Dependency: See also: F07405, F07406
p1257[0...n]

Vdc_min controller speed threshold / Vdc_min n_thresh

CUG120XA_USS Access level: 3
(Vdc_min)
Can be changed: T, U
Unit group: 3_1
Min:
0.00 [rpm]
Description: Sets the speed threshold for the Vdc-min controller (kinetic buffering).
If this value is exceeded a fault is output; the required response can be parameterized .
Kinetic buffering is not started below the speed threshold.
Note
Exiting the Vdc_min control before reaching motor standstill prevents the regenerative braking current from increasing
significantly at low speeds, and after a pulse inhibit, means that the motor coasts down.
However, the maximum braking torque can be set via the appropriate torque limiting.
r1258

CO: Vdc controller output / Vdc_ctrl output

Access level: 3
Can be changed: -
Unit group: 6_2
Min:
- [Arms]
Description: Displays the actual output of the Vdc controller (DC link voltage controller)
Note
The regenerative power limit p1531 is used for vector control to precontrol the Vdc_max controller. The lower the power
limit is set, the lower the correction signals of the controller when the voltage limit is reached.
p1260

Bypass configuration / Bypass config

Access level: 2
Can be changed: T
Unit group: -
Min:
0
Description: Sets the configuration for the bypass function.
SINAMICS G120XA converter
Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB
Buffer Vdc until undervoltage, n<p1257 -> F07405
Buff. Vdc until undervolt., n<p1257 -> F07405, t>p1255 -> F07406
Calculated: -
Scaling: -
Unit selection: -
Max:
1
Calculated: CALC_MOD_ALL Data type: FloatingPoint32
Scaling: -
Unit selection: p0505
Max:
210000.00 [rpm]
Calculated: -
Scaling: p2002
Unit selection: p0505
Max:
- [Arms]
Calculated: -
Scaling: -
Unit selection: -
Max:
3
Parameters
7.3 Parameters
Data type: Integer16
Dynamic index: DDS, p0180
Function diagram: -
Factory setting:
0
Dynamic index: DDS, p0180
Function diagram: -
Factory setting:
50.00 [rpm]
Data type: FloatingPoint32
Dynamic index: -
Function diagram: 6220
Factory setting:
- [Arms]
Data type: Integer16
Dynamic index: -
Function diagram: -
Factory setting:
0
501