Siemens SINAMICS G120 List Manual page 235

p1575[0...n] Voltage target value limit / U_tgt val lim
Access level: 4
Can be changed: U, T
Unit group: -
Min
50.00 [%]
Description: Sets the limit of the voltage target value.
In steady-state field weakening operation this corresponds to the required output voltage.
The value of 100% refers to p0304.
Dependency: Not visible with application class: "Standard Drive Control" (SDC, p0096 = 1)
Note: The output voltage is only limited if the maximum output voltage (r0071) minus the voltage reserve (p1574)
corresponds to a value higher than p1575.
Limiting via p1575 allows the influence of the voltage ripple of the line supply voltage to be eliminated at the operating
point.
p1580[0...n] Efficiency optimization / Efficiency opt.
PM230 Access level: 3
PM230_STO
Can be changed: U, T
Unit group: -
Min
0 [%]
Description: Sets the efficiency optimization.
When optimizing the efficiency, the flux setpoint of the closed-loop control is adapted as a function of the load.
For p1580 = 100 %, under no-load operating conditions, the flux setpoint is reduced to 50 % of the rated motor flux.
Dependency: Not visible with application class: "Standard Drive Control" (SDC, p0096 = 1)
Note: It only makes sense to activate this function if the dynamic response requirements of the speed controller are low.
In order to avoid oscillations, if required, the speed controller parameters should be adapted (increase Tn, reduce
Kp).
Further, the smoothing time of the flux setpoint filter (p1582) should be increased.
p1580[0...n] Efficiency optimization / Efficiency opt.
PM240 Access level: 3
PM250, PM260
Can be changed: U, T
Unit group: -
Min
0 [%]
Description: Sets the efficiency optimization.
When optimizing the efficiency, the flux setpoint of the closed-loop control is adapted as a function of the load.
For p1580 = 100 %, under no-load operating conditions, the flux setpoint is reduced to 50 % of the rated motor flux.
Dependency: Not visible with application class: "Standard Drive Control" (SDC, p0096 = 1)
Note: It only makes sense to activate this function if the dynamic response requirements of the speed controller are low.
In order to avoid oscillations, if required, the speed controller parameters should be adapted (increase Tn, reduce
Kp).
Further, the smoothing time of the flux setpoint filter (p1582) should be increased.
p1582[0...n] Flux setpoint smoothing time / Flux setp T_smth
Access level: 3
Can be changed: U, T
Unit group: -
Min
4 [ms]
Description: Sets the smoothing time for the flux setpoint.
Dependency: Not visible with application class: "Standard Drive Control" (SDC, p0096 = 1)
SINAMICS G120 Control Units CU240B-2/CU240E-2
List Manual (LH11), 01/2016, A5E33839529
Calculated: -
Scaling: -
Unit selection: -
Max
300.00 [%]
Calculated: -
Scaling: -
Unit selection: -
Max
100 [%]
Calculated: -
Scaling: -
Unit selection: -
Max
100 [%]
Calculated: p0340 = 1,3
Scaling: -
Unit selection: -
Max
5000 [ms]
2 Parameters
2.2 List of parameters
Data type: FloatingPoint32
Dyn. index: DDS, p0180
Func. diagram: 6725
Factory setting
200.00 [%]
Data type: FloatingPoint32
Dyn. index: DDS, p0180
Func. diagram: 6722
Factory setting
80 [%]
Data type: FloatingPoint32
Dyn. index: DDS, p0180
Func. diagram: 6722
Factory setting
0 [%]
Data type: FloatingPoint32
Dyn. index: DDS, p0180
Func. diagram: 6722, 6724
Factory setting
15 [ms]
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