Keba ServoOne User Manual

Designation
Description Parameters
Index
pmin
Min.pressurelimitpMin
Min.pressurereferencevaluepRef
Oneofthetwovalues,selectablewith
P 2840[4, 5]
2850
2847
5
2

PI(D)pressurecontroller(derivativetermnot
implementedatthetimeofwriting)
2850
0-4
n*
Pumpspeedsetpoint
Comment:Motorspeedsetpoint(gearing!):
ScopeID6:nref
2843
9
nmin
nmax
Speedlimitpressurecontrol
2851
2851
5
6
nActPump
Actualpumpspeedvalue
Comment:Actualmotorspeed(gearing!):
ScopeID13:nact
2843
12
QLeakCalc
L
QL,calc=Calculatedleakagevolumetric
flowrate
2843
6
QCalc
Q,calc0Calculatedvolumetricflowrate 2843
5
Qth
Theoreticalvolumetricflowrate 2843
14
QLeak
Leakagevolumetricflowrate 

Legend for “Volumetric flow rate control” (continue)
7.11.8.2Volumetricflowratecontrolwithoutpressurelimitation
If there is no need for a pressure limitation, a volumetric flow rate control without
pressure limitation (VolCon(5) = volumetric flow rate control (without pressure
limitation)) can be selected in P 2860 - HYD_TabConMode. This provides the same
functions but is not linked to the pressure control. Moreover, the pressure regulator
does not need to be parametrized for this control mode.
ID No.: 0842.26B.5-01Date: 09.2020
ServoOne- Device Help
202
7 Control
7.11.8.3Leakagecompensation
If there is a volumetric flow rate sensor available (this can also be determined based
on a measured cylinder speed as an alternative), measured value Qmess can
optionally be used for leakage compensation.
In this case, volumetric flow rate control with steady-state accuracy will be achieved.
ID Index Name / Setting Unit Description
2840 9 QLeakEst  Flowrateleakageestimationmethod
  0:NONE(0)=Noleakage
compensation
 Noleakagecompensation
  1:OBS(1)=Observer  Observer(seeleakagevolumetricflowrate
estimatefigure)
  2:MEAS(2)=Directly
measured
 Themeasuredvaluewillbeuseddirectly(this
mayresultinhigherdynamicperformancethan
withOBS(1),butheavynoiseisalsopossible!)
(TESTIMPLEMENTATION)
  3:CTRL(3)=PIcontroller  PIcontroller(Kp:P 2849[2] - lfe_K,Tn:P 2849
[3] - lfe_TN)
Table 7.81: Selection of leakage compensation

Keba ServoOne Specifications

General

Brand	Keba
Model	ServoOne
Category	Controller
Language	English