Emerson Rosemount 3490 Series, Справочное руководство

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b) Select
Tx2: PV
from the option list.
Note
The built-in Application (App) Wizard is an easy-to-use configuration tool that can
be used to automatically populate values and settings in the input channel
parameters.
Navigate to
SETUP
→
CONTROLLER
→
APPLICATION
→
App Wizard .
Before using the App Wizard, the Input Channel 2 parameter P121 on the control
unit must be set for a HART input. This is the factory default setting for P121.
Postrequisites
Proceed with configuration of optional parameters.
Optional parameters and how the HART data is processed
Figure 4-13 shows how the HART data is processed through Input Channel 2 and shows
which parameters and processing stages affect the result from Input Channel 2.
Figure 4-13: Transmitter Input Channel 2 for HART Input
B
P121
D900
A
D901
D902
D903
PV, SV,
TV or FV
P122
C
P124
D
(SV)
D801
(TV)
D802
(FV)
D803
H
D800
E
P123
Scaled
P
rof
ile
s
F G
(PV)
P127 P150
D851
(CH1 O/P)
P125 P126
D852
(CH2 O/P)
J
Tx1
Tx2
PV, SV,
TV and FV
PV, SV,
TV and FV
P151
I
P210
P121 = “Tx2 : PV”
A. Txr (Tx2) HART Variables
B. Input Source Select
C. Apply Input Offset
D. Apply Input Scale
E. Profile Select
F. Non-Linear Profile
G. Post Scale NLP
H. Low Cut-off Check
I. PV Damping
J. FV Select
Optional damping of control unit PV ten times a second: D800 = [D800
((D800now - D800before)/(1+10
× P210))]
HART digital data is continuously read from the transmitter
The HART transmitter digitally communicates pre-calculated values of four HART variables
Primary Variable (PV), Secondary Variable (SV), Tertiary Variable (TV), and Fourth Variable
(FV) to the control unit.
Reference Manual Getting started
00809-0100-4841 January 2021
Emerson.com/Rosemount 69