Emerson Rosemount - Sensor transducer block (index number 1100); LCD display transducer block (index number 1200); Analog input block (index number 1400, 1500, 1600, and 1700)

143
Reference Manual
00809-0100-4021, Rev GC
Section 4: FOUNDATION fieldbus Configuration
April 2014
Foundation™ fieldbus configuration
Sensor transducer block (index number 1100)
The Sensor Transducer Function Block (STB) temperature measurement data, includes sensor
and terminal (body) temperature. The STB also includes information about sensor type,
engineering units, linearization, reranging, damping, temperature compensation, and
diagnostics. Transmitter Revision 3 and above also contain Hot Backup
™
functionality in the
STB.
LCD display transducer block (index number 1200)
The LCD display transducer block is used to configure the LCD display.
Analog input block (index number 1400, 1500, 1600, and 1700)
The Analog Input Function Block (AI) processes the measurements from the sensor and makes
them available to other function blocks. The output value from the AI block is in engineering
units and contains a status indicating the quality of the measurement. The AI block is used for
scaling functionality.
PID block (index number 1800 and 1900)
The PID function block combines all of the necessary logic to perform proportional/inte-
gral/derivative (PID) control. The block supports mode control, signal scaling and limiting, feed
forward control, override tracking, alarm limit detection, and signal status propagation.
The block supports two forms of the PID equation: Standard and Series. Choose the appropriate
equation using the MATHFORM parameter. The Standard ISA PID equation is the default
selection and autotune.
Input selector (index number 2000)
The signal selector block provides selection of up to four inputs and generates an output based
on the configured action. This block normally receives its inputs from AI blocks. The block
performs maximum, minimum, middle, average, and ‘first good’ signal selection.
Output splitter (index number OSPL 2300)
The output splitter block provides the capability to drive two control outputs from a single
input. Each output is a linear function of some portion of the input.
Arithmetic (index number 2200)
This block is designed to permit simple use of popular measurement math functions. The user
does not have to know how to write equations. The math algorithm is selected by name, chosen
by the user for the function to be done.
Signal characterizer (index number 2100)
The signal characterizer block has two sections, each with an output that is a non-linear function
of the respective input. The non-linear function is determined by a single look-up table with 21
arbitrary x-y pairs. The status of an input is copied to the corresponding output, so the block
may be used in the control or process signal path.