Keba ServoOne User Manual

7.11.2.3Gearratiobetweenpumpandpumpmotor
If there is gearing between the pump and the pump motor, the gear ratio needs to be
entered in P2851[9] - HYD_Pump. If only the direction of rotation needs to be
changed (motor turns in a negative direction when the pump turns in the positive,
"correct" direction), a factor of "-1" can be entered to correct the direction of rotation.
7.11.2.3.1Parameters
ID Index Name Unit Description
2851  HYD_Pump  Pumpparameters
2851 0 displ ccm/rev Offset
2851 1 cTorque Nm/bar Torqueconstant
2851 2 pNom bar Nominalpressure
2851 3 nNom rpm Ratedspeed
2851 4 etaVol % Volumetricefficiencyatnominalpressure,
ratedspeed
2851 5 nMin rpm Minimumspeed
2851 6 nMax rpm Maximumspeed
2851 7 nCritical rpm Criticalspeed(@nominalpressure)
2851 8 TCritical s Max.permissibletimeatlowspeedand
nominalpressure
2851 9 iGearPump  Gearratiobetweenpumpandmotor
2851 10 p0 bar Max.permissiblestationarypressureata
standstill
2851 11 cLeakage (l/min)/bar Leakageconstant
2851 12 stopramp (1/min)/s Stopramp(duringvalveswitchingetc.)
2851 13 tSwValve ms Valveswitchingtime
2851 14 pMin bar Minimumpressure(dependingonpump
protectionfunction)
2851 15 pMax bar Maximumpressure(dependingonpump
protectionfunction)
Table 7.51: “Hydraulic - Pump” parameters
ID No.: 0842.26B.5-01Date: 09.2020
ServoOne- Device Help
181
7 Control
7.11.3Signalsetting
7.11.3.1Selectionofsignalsources
The signal sources of the actual values can be selected from two analogue inputs.
These are voltage inputs with a value range from -10 V to 10 V. The function can be
selected via the parameters P 109 - MPRO_ INPUT_FS_ISA00 and
P 110 - MPRO_ INPUT_FS_ISA01 by means of the function selector.
Additional analogue inputs for recording actual values are available using the
technology option (X8) Multi I/O Card and the parameters P 2716.0 - IEA04 and
P2716.1 IEA05. These can be configured either as voltage or current inputs (0.4...20
mA). A variety of signal sources can be set for the following actual value variables.
l Pressureactualvalue:PACT(-7)=Actualvalueofpressurecontrol
l Pressureactualvalue2:Hyd_P_Act2(-9)=Hydraulicactualpressure2nd
sensor
l Volumetricflowrateactualvalue:HYD_Q_ACT(-10)=Hydraulicactualflow
l Actualpositionvalue:Enc_ANA(-12)=analogueencoder(onchannel4)

Keba ServoOne Specifications

General

Brand	Keba
Model	ServoOne
Category	Controller
Language	English