Flowserve 3400IQ Digital Positioner - Manual (Page 34)

Logix 3400IQ Digital Positioner FCD LGENIM3401-00 – 06/06
34
Figure 11: Logix 3400 Block Diagram
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