Setting The Loop To Manual; Commissioning The Transmitter; Use With The Hart Tri-Loop; Set The Transmitter To Burst Mode - Emerson Rosemount 3144P Reference Manual

Reference Manual
00809-0100-4021, Rev AA
March 2002
Setting the Loop to
Manual
COMMISSIONING THE
TRANSMITTER
Use with the HART
Tri-Loop
When preparing to send or request data that would disrupt the loop or change
the output of the transmitter, set the process application loop to manual. The
Model 275 HART Communicator Interface will prompt the user to set the loop
to manual when necessary. Keep in mind that acknowledging this prompt
does not set the loop to manual. The prompt is only a reminder. Set the loop
to manual as a separate operation.
To prepare the Model 3144P transmitter with dual-sensor option for use with a
Model 333 HART Tri-Loop, you must configure the transmitter to Burst Mode
and set the process variable output order. 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 Model 3144P 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
These procedures assume that the sensors and the transmitter are
connected, powered, and functioning properly, and that a Model 275 HART
Communicator is connected to the transmitter control loop and is
communicating successfully. For communicator usage instructions, see
"Communication Tool" on page 3-2.

Set the Transmitter to Burst Mode

To set the transmitter to burst mode, follow the steps below.
1. From the Home screen, select 1 Device setup, 3 Configuration, 4 Device
output configuration, 3 HART output, 4 Burst option to prepare to set the
transmitter to burst command 3. The communicator displays the Burst
option screen.
2. Select Process vars/current. The communicator returns to the HART
output screen.
3. Select 3 Burst mode to prepare to enable Burst Mode. The
communicator displays the Burst Mode screen.
4. Select On to enable Burst Mode. The communicator returns to the HART
output screen.
5. Select Send to download the new configuration information to the
transmitter.

Set Process Variable Output Order

To set the process variable output order, follow the steps below.
Model 3144P
3-28