Emerson Rosemount 3490 Series Reference Manual page 69

Reference Manual
00809-0100-4841
b) Select Tx2: PV from the option list.
Postrequisites
Proceed with configuration of optional parameters.
Optional parameters and how the HART data is processed
Figure 4-13
which parameters and processing stages affect the result from Input Channel 2.
Figure 4-13: Transmitter Input Channel 2 for HART Input
P121 = "Tx2 : PV"
A
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 = [D800before +
((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.
Emerson.com/Rosemount
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.
shows how the HART data is processed through Input Channel 2 and shows
P121 P122
D900 PV, SV,
TV or FV
D901
B C
D902
D903
P125
F
P124 P123
Scaled
D E
Tx1
Tx2
Getting started
January 2021
P126
G
P127 P150 P210
(CH2 O/P)
H D852
(SV)
D851
D801
(CH1 O/P)
P151
(TV)
PV, SV, D802
TV and FV
(FV)
J D803
PV, SV,
TV and FV
(PV)
D800
I
69