Siemens CU240B-2 Parameter Manual page 218

Parameters
List of Parameters
p1574[0...n] Voltage reserve dynamic / U_reserve dyn
PM240 Access level: 3
PM250, PM260
Can be changed: U, T
Units group: 5_1
Min
0.0 [Vrms]
Description: Sets a dynamic voltage reserve.
Dependency: Refer to: p0500
Note: In the field weakening range, it must be expected that the control dynamic performance is somewhat restricted due
to the limited possibilities of controlling/adjusting the voltage. This can be improved by increasing the voltage
reserve. Increasing the reserve reduces the steady-state maximum output voltage (r0071).
p1580[0...n] Efficiency optimization / Efficiency opt.
PM230 Access level: 3
Can be changed: U, T
Units 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.
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
Units 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.
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
Units group: -
Min
4 [ms]
Description: Sets the smoothing time for the flux setpoint.
1-218
Calculated: p0340 = 1,3,5
Scaling: -
Unit selection: p0505
Max
150.0 [Vrms]
Calculated: -
Scaling: -
Unit selection: -
Max
100 [%]
Calculated: -
Scaling: -
Unit selection: -
Max
100 [%]
Calculated: p0340 = 1,3
Scaling: -
Unit selection: -
Max
5000 [ms]
SINAMICS G120 / Control Units CU240B/E-2 Parameter Manual (LH11), 01/2011
Data type: FloatingPoint32
Data set: DDS, p0180
Factory setting
10.0 [Vrms]
Data type: FloatingPoint32
Data set: DDS, p0180
Factory setting
80 [%]
Data type: FloatingPoint32
Data set: DDS, p0180
Factory setting
0 [%]
Data type: FloatingPoint32
Data set: DDS, p0180
Factory setting
15 [ms]
© Siemens AG 2011 All Rights Reserved