Siemens SINAMICS S120 System Manual page 243

Dynamic response
The dynamic response parameters provide information on the servo solenoid valve's ability
to respond to rapid signal changes.
The valve actuation time is a basic statement regarding the dynamic response. This is the
time that it takes the valve spool to follow a step in the valve spool setpoint of typically 0 to
100 %.
More exact information about the dynamic response is provided by the Bode diagram or
frequency response. In this case, a sinusoidal setpoint is applied to the valve. The amplitude
ratio and phase shift curves are then determined with respect to the frequency from the
actual and setpoint values of the valve spool. The valve frequency response is highly
dependent on the setpoint amplitude, which should therefore be specified as a parameter.
The dynamic response of servo solenoid valves is of particular interest in the range of
smaller signal amplitudes of 5 to 20% U
Figure A-11
Hydraulic Drive
System Manual, 04/2015, 6SL3097-4BA00-0BP1
Dynamic response of the valve
.
rated
Appendix
A.3 Hydraulic
243