Configure Hart Variables (Pv, Sv, Tv, Qv) - Emerson Micro Motion SGM Series Configuration And Use Manual

Integrate the meter with the control system
10.5.2

Configure HART variables (PV, SV, TV, QV)

ProLink III
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
Table 10-7: Options for HART variables
Process variable
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
108
Device Tools > Configuration > Communications > Communications (HART)
Primary Varia-
ble (PV)
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
Secondary Third Variable
Variable (SV) (TV)
✓ ✓
✓ ✓
✓ ✓
✓ ✓
✓ ✓
✓ ✓
✓ ✓
✓ ✓
✓ ✓
✓ ✓
✓ ✓
✓
✓
✓ ✓
®
Micro Motion Gas Specific Gravity Meters (SGM)
Fourth Varia-
ble (QV )
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓