Moog ACV with CANopen bus interface
7 Servo valve functions
Spool position controller
B99224-DV018-D-211, Rev. A, October 2018
157
7.3.6.1 Object 0x3237#1…3: Customer scaling external LVDT
This parameter is used to scale the input from the external LVDT to the actual main stage spool position.
7.3.6.2 Object 0x3235: External LVDT Actual Value
This parameter holds the main stage spool position actual value.
7.3.7 Main stage transducer selection
For applications with an external main stage position signal you can use a transducer interface to root any ac-
tual main stage spool position signal to the main stage spool position controller.
7.3.7.1 Object 0x2149: Active transducer interface main stage
This parameter holds the interface number for the main stage spool position actual value signal rooted to the
controller. If <ActiveTransducerInterfaceMainStage> (0x2149) = 0 then <SplActualValue> (0x6301) is used,
otherwise the output of the interface number <ActiveTransducerInterfaceMainStage> (0x2149).
7.3.8 Main stage spool position controller
The main stage spool position controller will be only used for dual stage servo valves. The main stage spool
position control deviation and the main stage spool position controller output can be accessed by correspond-
ing output parameters.
Chapter "7.3.5.1 Object 0x6350: Control deviation", page 156
7.3.8.1 Object 0x215C: Main stage customer overall gain
The internal controller output will be multiplied with this gain to get the <ControllerOutput> (0x2158).
ExternalLVDTActualValue (0x3235)
(Input + ExternalLvdtOffset (0x3237#3)) ExternalLvdtScaNumerator (0x3237#1)
×
ExternalLvdtScaDenominator (0x3237#2)
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=
ExternalLVDT
Index
Sub-index
Parameter name
Data type
Access
Persistence
Value range
Default
0x3237
1
ExternalLvdtScaNumerator
INT16
rw
Y
INT16
16386
0x3237
2
ExternalLvdtScaDenominator
INT16
rw
Y
INT16
16386
0x3237
3
ExternalLvdtOffset
INT16
rw
Y
INT16
0
ExternalLVDT
Index
Sub-index
Parameter name
Data type
Access
Per-
sistence
Value range
Default
0x3235
0
ExternalLVDTActualValue
INT16
ro
-
INT16
None
ValveMainStageControl
Index
Sub-index
Parameter name
Data type
Access
Per-
sistence
Value range
Default
0x2149
0
ActiveTransducerInterfaceMainStage
UINT8
rw
Y
0…8
None
ValveMainStageControl
Index
Sub-index
Parameter name
Data type
Access
Per-
sistence
Value range
Default
0x215C
0
MainStageCustomerOverallGain
FLOAT32
rw
Y
0.0…2.0
1.0
