Configure HART
®
variables (PV, SV, TV, QV)
Display Menu → Configuration → Inputs/Outputs → Channel A → HART Settings → HART Variables
ProLink III Device Tools → Configuration → Communications → Communications (HART) → Variable
Assignment
Field communicator Device Settings → Inputs/Outputs → Mapping/Source → Variable Mapping
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.
The default HART variables are as follows:
PV
Mass Flow
SV
Density
TV
Volume Flow
QV
Temperature
Note
The Tertiary Variable and Quaternary Variable are also called the Third Variable (TV) and Fourth Variable (FV).
Restriction
The Primary Variable is always the process variable assigned to mA Output 1. If you change either of these
assignments, the other is changed automatically.
The Secondary Variable and Tertiary Variable are not tied to any outputs. This is different from previous
Micro Motion Coriolis transmitters.
Procedure
Assign variables to the PV, SV, TV, and QV as desired.
Options for HART variables
Process variable
PV SV TV QV
Standard
Mass flow rate ✓ ✓ ✓ ✓
Volume flow rate ✓ ✓ ✓ ✓
Gas standard volume flow rate ✓ ✓ ✓ ✓
Temperature ✓ ✓ ✓ ✓
Density ✓ ✓ ✓ ✓
External pressure ✓ ✓ ✓ ✓
External temperature ✓ ✓ ✓ ✓
Totalizers and inventories
Current value of any totalizer ✓ ✓ ✓
Current value of any inventory ✓ ✓ ✓
Diagnostics
Velocity ✓ ✓ ✓ ✓
Configure digital communications Configuration and Use Manual
May2024 MS-00809-0200-1600
114 Emerson.com
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