Siemens CU240B-2 Parameter Manual page 224

Parameters
List of Parameters
p1726[0...n] Quadrature arm decoupling, scaling / Transv_decpl scal
Access level: 4
Can be changed: U, T
Units group: -
Min
0.0 [%]
Description: Sets the scaling of the quadrature arm decoupling
Note: This parameter is ineffective for sensorless vector control. In this case, p1727 is always used. If p1726 is set to 0,
then the quadrature de-coupling is de-activated. The integral component of the Isd current controller remains effec-
tive in the complete speed control range.
For the closed-loop control of synchronous motors, this parameter is used to scale the current controller de-cou-
pling.
p1727[0...n] Quadrature arm decoupling at voltage limit scaling / TrnsvDecplVmaxScal
Access level: 4
Can be changed: U, T
Units group: -
Min
0.0 [%]
Description: Sets the scaling of quadrature arm decoupling when the voltage limit is reached.
r1728 De-coupling voltage, in-line axis / U_dir-axis_decoupl
Access level: 4
Can be changed: -
Units group: 5_1
Min
- [Vrms]
Description: Displays the actual output of the quadrature channel de-coupling for the d axis.
r1729 De-coupling voltage, quadrature axis / U_quad_decoupl
Access level: 4
Can be changed: -
Units group: 5_1
Min
- [Vrms]
Description: Displays the actual output of the quadrature channel de-coupling for the q axis.
p1730[0...n] Isd controller integral component shutdown threshold / Isd_ctrl I_thresh
Access level: 4
Can be changed: U, T
Units group: -
Min
30 [%]
Description: Sets the speed activation threshold (referred to the synchronous speed r0336 / r0313) for pure quadrature branch
operation of the closed-loop current control.
The d current controller is only effective as P controller for speeds greater than the threshold value.
Warning: For settings above 80%, the d current controller is active up to the field weakening limit (maximum voltage)
This can result in unstable behavior as the closed-loop control at the maximum voltage is based on pure quadrature
branch operation.
Setting values as high as this should not be selected; they are only intended for test purposes.
Note: The parameter is only effective for induction motor operation without an encoder.
1-224
Calculated: p0340 = 1
Scaling: -
Unit selection: -
Max
200.0 [%]
Calculated: -
Scaling: -
Unit selection: -
Max
200.0 [%]
Calculated: -
Scaling: p2001
Unit selection: p0505
Max
- [Vrms]
Calculated: -
Scaling: p2001
Unit selection: p0505
Max
- [Vrms]
Calculated: p0340 = 1,3,4
Scaling: -
Unit selection: -
Max
150 [%]
SINAMICS G120 / Control Units CU240B/E-2 Parameter Manual (LH11), 01/2011
Data type: FloatingPoint32
Data set: DDS, p0180
Factory setting
75.0 [%]
Data type: FloatingPoint32
Data set: DDS, p0180
Factory setting
50.0 [%]
Data type: FloatingPoint32
Data set: -
Factory setting
- [Vrms]
Data type: FloatingPoint32
Data set: -
Factory setting
- [Vrms]
Data type: FloatingPoint32
Data set: DDS, p0180
Factory setting
30 [%]
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