Siemens SINAMICS G120 - p1255[0...n] Vdc_min controller time threshold; Vdc_min t_thresh; p1256[0...n] Vdc_min controller response (kinetic buffering); Vdc_min response; p1257[0...n] Vdc_min controller speed threshold; Vdc_min n_thresh; r1258 CO: Vdc controller output; Vdc_ctrl output

List of Parameters
Parameters
1-181
© Siemens AG 2011 All Rights Reserved
SINAMICS G120 Control Units CU240B/E-2 Parameter Manual (LH11), 01/2011
Description: Sets the time threshold for the Vdc_min controller (kinetic buffering).
If this value is exceeded a fault is output; the required response can be parameterized.
Prerequisite: p1256 = 1
Dependency: Refer to: 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.
Description: Sets the response for the Vdc_min controller (kinetic buffering).
Value: 0: Buffer Vdc until undervoltage, n<p1257 -> F07405
1: Buff. Vdc until undervolt., n<p1257 -> F07405, t>p1255 -> F07406
Dependency: Refer to: F07405, F07406
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 .
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 pre-control 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.
p1255[0...n] Vdc_min controller time threshold / Vdc_min t_thresh
PM230
PM240
Access level: 3 Calculated: - Data type: FloatingPoint32
Can be changed: U, T Scaling: - Data set: DDS, p0180
Units group: - Unit selection: -
Min Max Factory setting
0.000 [s] 1800.000 [s] 0.000 [s]
p1256[0...n] Vdc_min controller response (kinetic buffering) / Vdc_min response
PM230
PM240
Access level: 3 Calculated: - Data type: Integer16
Can be changed: U, T Scaling: - Data set: DDS, p0180
Units group: - Unit selection: -
Min Max Factory setting
0 1 0
p1257[0...n] Vdc_min controller speed threshold / Vdc_min n_thresh
PM230
PM240
Access level: 3 Calculated: p0340 = 1 Data type: FloatingPoint32
Can be changed: U, T Scaling: - Data set: DDS, p0180
Units group: 3_1 Unit selection: p0505
Min Max Factory setting
0.00 [rpm] 210000.00 [rpm] 50.00 [rpm]
r1258 CO: Vdc controller output / Vdc_ctrl output
PM230
PM240
Access level: 3 Calculated: - Data type: FloatingPoint32
Can be changed: - Scaling: p2002 Data set: -
Units group: 6_2 Unit selection: p0505
Min Max Factory setting
- [Arms] - [Arms] - [Arms]