Keba ServoOne Device Help page 201

7 Control
ID No.: 0842.26B.5-01 Date: 09.2020
If there are stricter requirements concerning the volumetric flow rate accuracy,
QLeak must be taken into account as a function of pressure and nRefPump must be
increased accordingly.
In addition, limiting the pressure upwards to a maximum pressure of pmax is usually
a requirement. Moreover, a minimum pressure of pmin may also be required. An
additional pressure limiting control system is set up for this purpose. If the configured
pressure limits are reached, the motor speed will be dynamically limited upwards or
downwards accordingly.
NOTE
To do so, the pressure regulator must also be parametrized and
l
set.
In addition to the pressure limitation, the minimum and maximum volumetric flow rate
can be set via a volumetric flow rate limitation (see Section "Hydraulic Limitations"
on page 186).
Image 7.69: "Volumetric flow rate control" screen
Designation Description
Pressure actual value pAct
Pressure actual value pAct2
pAct
One of the two values, selectable with
P 2840[3]
Volumetric flow rate setpoint QRef
QRefInput
max. pressure limit pMax
max. pressure reference value pRef
pmax
One of the two values, selectable with
P 2840[4, 5]
Legend for "Volumetric flow rate control"
ServoOne - Device Help 201
Parameters Index
0
2847
2847
1
2847
3
6
2850
2847 2