Keba ServoOne User Manual

anerrorwouldbetriggeredonesecondlaterand,normally,thedrivewould
bestopped.
If continuous pressure is permissible even at full stop, the corresponding pressure
can be entered in P2851[10] - HYD_Pump.
7.11.2.2.2Pressure-dependentspeedregulationcharacteristic
Image 7.54: Pressure-dependent speed regulation characteristic
For some types of pumps (e.g. internal-gear pumps), negative speeds for very low
pressures (0 bar) are not permitted because in these operating areas, the lubrication
of the pump gear can no longer be ensured. This is why it is possible to configure
the pump characteristic curve in dependence on pressure, which makes it possible
to protect the pump from mechanical destruction (P 2840.14 PumpSpdProt = 1). It is
nonetheless still possible to quickly relieve a high pressure through a negative
pump speed. Using P 2851[14,15]-HYD_Pump, it is possible to configure a
minimum and maximum pressure for negative speeds. The minimum and maximum
ID No.: 0842.26B.5-01Date: 09.2020
ServoOne- Device Help
180
7 Control
speed (P 2851.5 nMin and P 2851.6 nMax) from the pump configuration are used
for nMin and nMax. Thus, a negative pump speed is permitted as of the set minimum
pressure for high pressures. The entire speed range can be utilized above the
specified maximum pressure. In the transition range from minimum to maximum
pressure, the speed curve is linear. The speed characteristic of the pump then
behaves a follows:
p
P 2851.15 pMax
P 2851.14 pMin
P 2851.5 nMin
P 2851.6 nMax
n
Image 7.55: Pressure-dependent speed regulation characteristic

Keba ServoOne Specifications

General

Brand	Keba
Model	ServoOne
Category	Controller
Language	English