Siemens SINAMICS G120 List Manual page 208

2 Parameters
2.2 List of parameters
Note: The resonance damping function dampens active current oscillations that frequency occur under no-load conditions.
The resonance damping is active in a range from approximately 6 % of the rated motor frequency (p0310). The
shutoff frequency is determined by p1349.
For the open-loop control modes p1300 = 5 and 6 (textile sectors), the resonance damping is internally disabled in
order that the output frequency can be precisely set.
p1339[0...n] U/f mode resonance damping filter time constant / Uf Res_damp T
Access level: 4
Can be changed: U, T
Unit group: -
Min
1.00 [ms]
Description: Sets the filter time constant for resonance damping for U/f control.
Dependency: Not visible with application class: "Dynamic Drive Control" (DDC, p0096 = 2)
Refer to: p1300, p1338, p1349
p1340[0...n] I_max frequency controller proportional gain / I_max_ctrl Kp
Access level: 3
Can be changed: U, T
Unit group: -
Min
0.000
Description: Sets the proportional gain of the I_max frequency controller.
The I_max controller reduces the drive converter output current if the maximum current (r0067) is exceeded.
In the U/f operating modes (p1300) for the I_max control, one controller is used that acts on the output frequency and
one controller that acts on the output voltage. The frequency controller reduces the current by decreasing the
converter output frequency. The frequency is reduced down to a minimum value (equaling twice rated slip). If the
overcurrent condition cannot be successfully resolved using this measure, then the drive converter output voltage is
reduced using the I_max voltage controller. Once the overcurrent condition has been resolved, the drive is
accelerated along the ramp set in p1120 (ramp-up time).
Dependency: In the U/f modes (p1300) for textile applications and for external voltage setpoints, only the I_max voltage controller
is used.
Not visible with application class: "Dynamic Drive Control" (DDC, p0096 = 2)
Notice: When de-activating the I_max controller, the following must be carefully observed:
When the maximum current (r0067) is exceeded, the output current is no longer reduced. The drive is switched off
when the overcurrent limits are exceeded.
Note: The I_max limiting controller becomes ineffective if the ramp-function generator is de-activated with p1122 = 1.
p1341 = 0:
I_max frequency controller de-activated and I_max voltage controller activated over the complete speed range.
p1341[0...n] I_max frequency controller integral time / I_max_ctrl Tn
Access level: 3
Can be changed: U, T
Unit group: -
Min
0.000 [s]
Description: Sets the integral time for the I_max frequency controller.
Dependency: Not visible with application class: "Dynamic Drive Control" (DDC, p0096 = 2)
Refer to: p1340
Note: When p1341 = 0, the current limiting controller influencing the frequency is de-activated and only the current limiting
controller influencing the output voltage remains active (p1345, p1346).
In the case of power units with regenerative feedback (PM250, PM260), current limitation control for a regenerative
load is always implemented by influencing the frequency. This current limiting function is de-activated with p1340 =
p1341 = 0.
208
Calculated: p0340 = 1,3,4
Scaling: -
Unit selection: -
Max
1000.00 [ms]
Calculated: p0340 = 1,3,4
Scaling: -
Unit selection: -
Max
0.500
Calculated: p0340 = 1,3,4
Scaling: -
Unit selection: -
Max
50.000 [s]
SINAMICS G120 Control Units CU240B-2/CU240E-2
Data type: FloatingPoint32
Dyn. index: DDS, p0180
Func. diagram: 6310
Factory setting
20.00 [ms]
Data type: FloatingPoint32
Dyn. index: DDS, p0180
Func. diagram: 6300
Factory setting
0.000
Data type: FloatingPoint32
Dyn. index: DDS, p0180
Func. diagram: 6300
Factory setting
0.300 [s]
List Manual (LH11), 01/2016, A5E33839529