Moog ACV with CANopen bus interface
7 Servo valve functions
Spool position setpoint conditioning / demand value generator
B99224-DV018-D-211, Rev. A, October 2018
147
7.2.7 Characteristic compensation
The characteristic compensation function can be used to modify the input signal in order to compensate the
nonlinearity of the flow as a function of the spool position. A look-up table is used to define the spool position
characteristic. With the parameter <CharacteristicCompensation_Type> (0x6346), the characteristic compen-
sation function is switched on or off. This table is predefined by Moog during production to linearize the flow.
The look-up table can be modified for special applications.
Figure 63: Characteristic compensation
7.2.7.1 Object 0x6346: Type
This parameter switches the characteristic compensation function on or off.
Value description
<CharacteristicCompensation_LookUpTable>
(0x4348) / (0x4349) / (0x434A)
output
<...LookUpTable>
(0x4348)
<..
.L
oo
kUpT
abl
e>
(0
x4
34
9)
<...LookUpTable>
(0x434A)
Spool position
characteristic
compensation
input
output
<CharacteristicCompensation_Type>
(0x6346)
+100 %
-100 %
+1
00
%
-10
0
%
input
ValvePositionControl_DemandValueGenerator
Index
Sub-index
Parameter name
Data type
Access
Per-
sistence
Value range
Default
0x6346
0
CharacteristicCompensation_Type
INT8
rw
Y
–1…0
0
<CharacteristicCompensation_Type>
Description
0
Characteristic compensation switched off.
–1
Characteristic compensation activated.
Table 76: Possible values of parameter <CharacteristicCompensation_Type> (0x6346)
