Siemens SINAMICS G120 Manual page 171

p1255[0...n] Vdc_min controller time threshold / Vdc_min t_thresh
PM230 Access level: 3
PM240
Can be changed: U, T
Units group: -
Min
0.000 [s]
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.
p1256[0...n] Vdc_min controller response (kinetic buffering) / Vdc_min response
PM230 Access level: 3
PM240
Can be changed: U, T
Units group: -
Min
0
Description: Sets the response for the Vdc_min controller (kinetic buffering).
Value: 0:
1:
Dependency: Refer to: F07405, F07406
p1257[0...n] Vdc_min controller speed threshold / Vdc_min n_thresh
PM230 Access level: 3
PM240
Can be changed: U, T
Units 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 .
r1258 CO: Vdc controller output / Vdc_ctrl output
PM230 Access level: 3
PM240
Can be changed: -
Units 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 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.
© Siemens AG 2011 All Rights Reserved
SINAMICS G120 Control Units CU230P-2 Parameter Manual (LH9), 01/2011
Buffer Vdc until undervoltage, n<p1257 -> F07405
Buff. Vdc until undervolt., n<p1257 -> F07405, t>p1255 -> F07406
Calculated: -
Scaling: -
Unit selection: -
Max
1800.000 [s]
Calculated: -
Scaling: -
Unit selection: -
Max
1
Calculated: p0340 = 1
Scaling: -
Unit selection: p0505
Max
210000.00 [rpm]
Calculated: -
Scaling: p2002
Unit selection: p0505
Max
- [Arms]
Parameters
List of Parameters
Data type: FloatingPoint32
Data set: DDS, p0180
Factory setting
0.000 [s]
Data type: Integer16
Data set: DDS, p0180
Factory setting
0
Data type: FloatingPoint32
Data set: DDS, p0180
Factory setting
50.00 [rpm]
Data type: FloatingPoint32
Data set: -
Factory setting
- [Arms]
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