Parameters
List of Parameters
1-184
© Siemens AG 2007 All Rights Reserved
SINAMICS G120 Control Units CU240S, Edition 05/2007
Description: Sets pulse frequency of power switches in inverter.
The frequency can be changed in steps of 2 kHz.
Dependency: The minimum/maximum/default values of the pulse frequency are determined by the used power module.
Furthermore the minimum pulse frequency depends on the parametrization of P1082 (maximum frequency) and
P0310 (rated motor frequency).
Note: If the pulse frequency is increased, max. inverter current r0209 can be reduced (derating). The derating character-
istic depends on the type and power of the inverter.
If silent operation is not absolutely necessary, lower pulse frequencies may be selected to reduce inverter losses
and radio-frequency emissions.
Under certain circumstances, the inverter may reduce the pulse frequency to provide protection against overtem-
perature (see P0290 and P0291 Bit00).
Description: Displays informations about pulse frequency of power switches in inverter.
r1801[0] Displays the actual inverter pulse frequency.
r1801[1] Displays the minimum inverter pulse frequency which can be reached when the functions "motor identifica-
tion" or "inverter overload reaction" are active. If no PM is plugged this parameter is set to 0 kHz.
Index: [0] = Actual pulse frequency
[1] = Minimum pulse frequency
Notice: Under certain conditions (inverter overtemperature, see P0290), this can differ from the values selected in P1800
(pulse frequency).
Description: Selects inverter modulator mode.
Values: 1: Asymmetric SVM
2: Space vector modulation
3: SVM/ASVM controlled mode
Notice: • Asymmetric space vector modulation (ASVM) produces lower switching losses than space vector modulation
(SVM), but may cause irregular rotation at very low speeds.
• Space vector modulation (SVM) with over-modulation may produce current waveform distortion at high output
voltages.
• Space vector modulation (SVM) without over-modulation will reduce maximum output voltage available to
motor.
Note: If a LC-filter is selected (P0230 = 3 or (P0230 = 4 and P0234 > 0)), modulation is set to SVM (P1802 = 2) .
If an internal output filter is installed the modulation is foreced to SVM (P0230 = 3 and P1802 = 2).
p1800[0...2] Pulse frequency / Pulse frequency
Access level: 2 P-Group: Converter Data type: Unsigned16
Quick comm. NO Active: YES Data set: DDS
Can be changed: U, T
Min Max Factory setting
2 [kHz] 16 [kHz] 4 [kHz]
r1801[0...1] CO: Pulse frequency / Pulse frequency
Access level: 3 P-Group: Converter Data type: Unsigned16
Unit: [kHz] Data set: -
p1802 Modulator mode / Modulator mode
Access level: 3 P-Group: Converter Data type: Unsigned16
Quick comm. NO Active: NO Data set: -
Can be changed: U, T
Min Max Factory setting
1 3 3
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