S120可以抑制机械谐振，6SE70不可以。
Basic functions
6.7 Pulse frequency wobbling
Drive functions
222 Function Manual, (FH1), 11/2009, 6SL3097-4AB00-0BP0
6.7 Pulse frequency wobbling
Des cription
The function is available for Motor Modules in chassis format with DRIVE-CLiQ (order
numbers: 6SL3***-***xx-***3) available in the vector control type.
Pulse frequency wobbling damps the spectral components, which can generate unwanted
noise in the motor. Wobbling can be activated only for pulse frequencies that are lower than
or equal to the current controller frequency (see also p0115[0]).
Wobbling causes the pulse frequency in a modulation interval to deviate from the setpoint
frequency. This means that the actual pulse frequency might be higher than the average
pulse frequency required.
A noise generator can be used to vary the pulse frequency around an average value. In this
case, the average pulse frequency is equal to the setpoint pulse frequency. The pulse
frequency can be varied in every current controller cycle if the cycle is constant. Current
measurement errors resulting from asynchronous pulse and control intervals are
compensated by a correction in the actual current value.
Pulse frequency wobbling can be parameterized with parameter p1810 "Modulator
configuration".