Emerson Micro Motion SGM Series - Configure HART Variables (PV, SV, TV, QV)

10.5.2 Configure HART variables (PV, SV, TV, QV)
ProLink III Device Tools > Configuration > Communications > Communications (HART)
Field Communicator Configure > Manual Setup > Inputs/Outputs > Variable Mapping
Overview
The HART variables are a set of four variables predefined for HART use. The HART variables
include the Primary Variable (PV), Secondary Variable (SV), Tertiary Variable (TV), and
Quaternary Variable (QV). You can assign specific process variables to the HART variables,
and then use standard HART methods to read or broadcast the assigned process data.
Tip
The Tertiary Variable and Quaternary Variable are also called the Third Variable (TV) and Fourth
Variable (FV).
Restriction
On some devices, the PV is fixed to a specific process variable and cannot be changed.
Options for HART variables
Options for HART variablesTable 10-7:
Process variable
Primary Varia-
ble (PV)
Secondary
Variable (SV)
Third Variable
(TV)
Fourth Varia-
ble (QV )
Standard
Line Density ✓ ✓ ✓ ✓
Line Temperature ✓ ✓ ✓ ✓
Line Temperature (External or Fixed) ✓ ✓ ✓ ✓
Line Pressure (External or Fixed) ✓ ✓ ✓ ✓
Volume Flow Rate (External) ✓ ✓ ✓ ✓
Volume Flow Rate (Calculated) ✓ ✓ ✓ ✓
Mass Flow Rate (External) ✓ ✓ ✓ ✓
Mass Flow Rate (Calculated) ✓ ✓ ✓ ✓
Drive Gain ✓ ✓ ✓ ✓
Sensor Time Period ✓ ✓ ✓ ✓
User-Defined Calculation Output ✓ ✓ ✓ ✓
Board Temperature ✓ ✓
Input Voltage ✓ ✓
Concentration
Concentration ✓ ✓ ✓ ✓
Integrate the meter with the control system
108 Micro Motion
®
Gas Specific Gravity Meters (SGM)