Siemens SINAMICS G120D CU240D-2 DP Manual page 202

2 Parameters
2.2 List of parameters
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.
r1343 CO: I_max controller frequency output / I_max_ctrl f_outp
Access level: 3
Can be changed: -
Unit group: 3_1
Min
- [rpm]
Description: Displays the effective frequency limit.
Dependency: Not visible with application class: "Dynamic Drive Control" (DDC, p0096 = 2)
Refer to: p1340
202
Calculated: p0340 = 1,3,4
Scaling: -
Unit selection: -
Max
0.500
Calculated: p0340 = 1,3,4
Scaling: -
Unit selection: -
Max
50.000 [s]
Calculated: -
Scaling: p2000
Unit selection: p0505
Max
- [rpm]
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]
Data type: FloatingPoint32
Dyn. index: -
Func. diagram: 6300
Factory setting
- [rpm]
SINAMICS G120D
List Manual (LH14), 01/2016, A5E33842313