Valve Characteristic - Copying - Siemens SINAMICS S120 System Manual

Commissioning
4.17 Editing the valve characteristic
● Valve characteristic with transition point at the start of a saturation range
To calculate the inverse characteristic, the start of a parabolic, rounded saturation range
in the positive and negative quadrants of the valve characteristic are specified with p1845
and p1846 and with p1847 and p1848.
The positive valve flow rate at the start of the saturation range in relation to the rated
valve flow rate is entered in p1845 and the negative value in p1847.
The positive valve voltage in relation to the rated valve voltage is entered in p1846 and
the negative valve voltage in p1848.
The saturation range is compensated by a root characteristic in such a way that the
intersection point lies on a continuous tangent and the characteristic ends at the point
(100%, 100%).
There is no saturation range in the positive or negative quadrant with default value 100%
in p1845 and p1846 or in p1847 and p1848.
Figure 4-35
4.17.10

Valve characteristic - copying

With this dialog, you can copy the characteristic of the drive data set (DDS) currently
selected in the drive to another drive data set.
Further actions
● Use the "Select target DDS" softkey to open a dialog to select the drive data set into
which the characteristic data should be copied.
● Use the "Cancel" softkey to return to the "Valve characteristics measurement" dialog. No
action is executed.
● Use the "OK" softkey to return to the "Valve characteristics measurement" dialog. The
characteristic is copied into the selected drive data set.
102
Characteristic to linearize the valve
System Manual, 04/2015, 6SL3097-4BA00-0BP1
Hydraulic Drive