Analogue Input Function Block - Endress+Hauser iTEMP TMT 165 FOUNDATION Fieldbus Betriebsanleitung

11 Appendix
Category Block
Calculate ARTH (Arithmetic)
CHAR (Characterization)
INTG (Integrator)
AALM (Analogue Alarm)
ISEL (Input Signal Selector)
TIME (Timer)
LLAG (Lead Lag)
CT (Constant Generator)
Transducer and RES (Resource Block)
Resource
TRD (Transducer Block)
DSP (Display Transducer)
DIAG (Diagnostics Transducer)
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11.6 Analogue Input Function Block

In the Analogue Input Function Block the process variables (temperature or differential
temperature) are prepared by the Transducer Block for the subsequent automation
functions (e.g. scaling, limit value processing). The automation function is defined by
the connections of the outputs.
Fig. 11-1: OUT = output value and output status of the Analogue Input Function Block
FOUNDATION Fieldbus temperature transmitter
Description
This calculation block provides some pre-defined equations ready for
use in applications as flow compensation, HTG, ratio control and
others.
It has capability for two signal characterization based on the same
curve. The second input has an option for swapping "x" to "y", providing
an easy way to use the inverse function, that may be used in signal
characterization of read-back variables.
It integrates a variable in function of the time. There is a second flow
input that may be used for the following applications: net flow
totalization, volume/mass variation in vessels and precise flow ratio
control.
This alarm block has dynamic alarm limits, hysteresis, temporary
expansion of alarm limits on step setpoint changes to avoid nuisance
alarms, two levels of alarm limits and delay for alarm detection.
This block has four analogue inputs that may be selected by an input
parameter or according to a criterion as first good, maximium,
minimum, middle and average.
This block has four discrete inputs that are processed by combination
logic. The selected timer processing type operates on the combined
input signal to produce a measurement, delay, extension, and pulse or
debounce.
This block provides dynamic compensation of a variable. It is used
normally in a feed-forward control.
It provides analogue and discrete output parameters with constant
values.
This block contains data that is specific to the hardware that is
associated with the resource.
This block converts the primary variables of the physical I/O devices
into the proper enginnering.
This block configures what process variables of the function blocks will
be displayed in the device LCD panel.
It provides online measurement of block execution time, check of links
between blocks and other features.
Endress+Hauser