Siemens SINAMICS S120 System Manual page 181

Parameter:
● p0208: Valve rated flow rate
● p0209: Valve rated pressure drop
Valves with the associated data are included in the valve selection list.
Other valve data includes:
● Transition point characteristic
– p0206 valve transition point flow rate
– p0207 valve transition point voltage
● Flow rate ratio
– p0211 valve flow rate ratio A to B side
● Dynamically written to with natural frequency and damping
– p0216 valve natural frequency
– p0217 valve damping
● Valve configuration
– p0218 cylinder safety configuration
Parameter:
● p0205 valve rated voltage
● p0206 valve transition point flow rate
A valve characteristic according to Figure 3-2 Diagram of a servo solenoid valve
characteristic with transition point and its compensation in the HLA module (Page 40)
results in an entry of 10 % in p0205 and 40 % in p0206. If the same value is entered in
both parameters, then a linear characteristic is involved (default setting).
● p0211 valve flow rate ratio A to B side
The flow rate ratio specifies the ratio between the nominal flow towards the A side and
the nominal flow towards the B side.
● p0216 valve natural frequency
To dimension the velocity controller, the transfer response of the valve when converting
the voltage setpoint to the spool position is approximated as a PT2 low-pass filter.
The valve natural frequency can be read for a phase shift of -180°. The valve natural
frequency for a valve modulation of 10% in relation to 100 bar precontrol pressure is
specified in p0216.
For values less than 0.7, the valve damping can be calculated from the amplitude
overshoot at resonant frequency. The valve damping for a valve modulation of 20 % in
relation to 100 bar precontrol pressure is specified in p0216.
Hydraulic Drive
System Manual, 04/2015, 6SL3097-4BA00-0BP1
Drive functions
5.7 Valve
181