Using The Transmitter With The Hart Tri-Loop; Set The Transmitter To Burst Mode - Emerson Rosemount 644 with HART Protocol Reference Manual

Configuration
July 2018
Field Communicator
From the HOME screen, enter the Fast Key sequence.
Device Dashboard Fast Keys
AMS Device Manager
1. Right click on the device and select Configuration Properties from the menu.
2. In HART Revision 5 mode:

3. In HART Revision 7 mode:

2.13

Using the transmitter with the HART Tri-Loop

To prepare the Rosemount 644 Transmitter with dual-sensor option for use with a Rosemount 333 HART
Tri-Loop, the transmitter must be configured to Burst Mode and the process variable output order must
be set. In Burst Mode, the transmitter provides digital information for the four process variables to the
HART Tri-Loop. The HART Tri-Loop divides the signal into separate 4–20 mA loops for up to three of the
following choices:
Primary Variable (PV)

Secondary Variable (SV)

Tertiary Variable (TV)

Quaternary Variable (QV)

When using the Rosemount 644 Transmitter with dual-sensor option in conjunction with the HART
Tri-Loop, consider the configuration of the differential, average, first good temperatures, Sensor Drift
Alert, and Hot Backup features (if applicable).
Note
The procedures are to be used when the sensors and transmitters are connected, powered, and
functioning properly. Also, Field Communicator must be connected and communicating to the
transmitter control loop. For communicator usage instructions, see
2.13.1

Set the transmitter to burst mode

To set the transmitter to burst mode, follow the steps below with the Fast Key sequence.
Field Communicator
From the HOME screen, enter the Fast Key sequence.
Device Dashboard Fast Keys
36
In the HART tab, enter poll address into the Polling Address box, select Apply.
In the HART tab, select the Change Polling Address button.
1, 2, 1
HART 5 HART 7
2, 2, 8, 4 2, 2, 8, 5
Reference Manual
00809-0200-4728, Rev SA
"Field Communicator" on page 9.
Configuration