Emerson Rosemount 752 FOUNDATION, Справочное руководство

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11
Reference Manual
00809-0100-4377, Rev CA
Configuration
January 2018
Configuration
2.7 F
OUNDATION
Fieldbus function blocks
For reference information on the LCD Transducer and Advanced Diagnostics Transducer blocks refer to
“Foundation Fieldbus Block Information” on Rosemount 3051S Series Pressure Transmitter Family with
F
OUNDATION
Fieldbus protocol” Product Data Sheet available on Emerson.com/Rosemount-3051S .
Reference information on the ISEL, INT, ARTH, SGCR and PID blocks can be found in the Function Block
Reference Manual .
Resource block (1000)
The Resource block contains diagnostic, hardware and electronics information. There are no linkable
inputs or outputs to the Resource Block.
LCD transducer block (1100)
The LCD Transducer Block is used to configure the LCD meter.
PID block (1200)
The PID Function Block combines all of the necessary logic to perform proportional/integral/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. You can select the appropriate
equation using the MATHFORM parameter. The Standard ISA PID equation is the default selection.
Input selector block (1300)
The Input Selector (ISEL) Function Block can be used to select the first good, Hot Backup, maximum,
minimum, or average of as many as eight input values and place it at the output. The block supports
signal status propagation.
Signal characterizer block (1400)
The Signal Characterizer (SGCR) Function Block characterizes or approximates any function that defines
an input/output relationship. The function is defined by configuring as many as twenty X,Y coordinates.
The block interpolates an output value for a given input value using the curve defined by the configured
coordinates. Two separate analog input signals can be processed simultaneously to give two
corresponding separate output values using the same defined curve.
Arithmetic block (1500)
The Arithmetic (ARTH) Function Block provides the ability to configure a range extension function for a
primary input. It can also be used to compute nine different arithmetic functions.
Integrator block (1600)
The Integrator (INT) Function Block integrates one or two variables over time. The block compares the
integrated or accumulated value to pre-trip and trip limits and generates discrete output signals when
the limits are reached.