Fieldbus Analog Input Data Manipulation; Figure 6 Integration Of Fieldbus Device Analog Input Signal With Control Builder Control Strategy; R400 Experion Pks Series A Fieldbus Interface Module User's Guide July - Honeywell Series A User Manual

CPM/CEE
FIM
Fieldbus
Device
Figure 6 Integration of fieldbus device analog input signal with Control

Fieldbus Analog Input data manipulation

When the OUT from the fieldbus analog input function block is wired to the PV input for
a PID function block, the Control Builder creates a CEE input agent to handle the analog
input from the fieldbus block. The block-like input agent maps the data structure (DS-65)
of the OUT parameter to the Control Builder PV with status parameter. It interprets the
value portion in fieldbus terms and converts it to Control Builder representation. The
floating-point representation is identical, in most cases, but the fieldbus +/-infinity value
must be converted to a Control Builder representation.
If the fieldbus status byte indicates "BAD", the value must be converted to Not a Number
(NaN) for Control Builder representation. The fieldbus data quality of good, bad, and
R400 Experion PKS Series A Fieldbus Interface Module User's Guide
July 2010
3. Fieldbus Integration With Experion System
CM
PV
PID
FIM
Analog
Input
OUT
Transducer
Builder control strategy
Honeywell
3.2. Control Integration
OP
OP
AOC
AOC = Analog Output Channel
CEE = Control Execution Environment
CM = Control Module
CPM = Control Processor Module
FIM = Fieldbus Interface Module
OP = Output
PID = Proportional, Integral, Derivative
PV = Process Variable
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