Flowserve 3400IQ Digital Positioner User Manual
Page 9
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Logix 3400IQ Digital Positioner FCD LGENIM3401-00 – 06/06
flowserve.com
Figure 2: System Positioning Algorithm
Sensor
-
+
+
+
+
Summer
Integration
I
Offset
Loop
Inner
+
-
Gmult
Pmin
Pmax
Deviation
F
OUNDA
TION
Fieldbus
Signal
Command In
(AO Block)
F
OUNDA
TION
Fieldbus Transducer
Block
CONTROL
COMMAND
Output
D/A
Per
centage
Algorithm
Control
Supply
Air
Control
Spool
Loop
Inner
ATO
Tubed
Sensor
Position
Stem
Voltage
Valve
Piezo
MPC
Soft Limits
Characterization
Linear Mode
Output
Inner
-Loop
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