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
MOOG
ID No.: CB40859-001 Date: 11/2020
MSD Servo Drive - Device Help
179
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 analog 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 analog 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) = analog encoder (on channel 4)