Set The Transmitter To Burst Mode; Set Process Variable Output Order - Emerson Rosemount 644 Reference Manual

Temperature transmitter with hart protocol
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Reference Manual
00809-0200-4728, Rev RA
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.
Setting the burst mode with a Field Communicator
From the HOME screen, enter the Fast Key sequence.
Device Dashboard Fast Keys
Setting the burst mode with AMS Device Manager
1.
2.
3.
4.
2.13.2

Set process variable output order

To set the process variable output order, follow the steps in one of the methods outlined in
"Mapping the HART variables" on page
Note
Take careful note of the process variable output order. The HART Tri-Loop must be configured to
read the variables in the same order.
Special considerations
To initiate operation between a 644 transmitter with dual-sensor option and the HART Tri-Loop,
consider the configuration of both the differential, average and first good temperatures, Sensor
Drift Alert, and Hot Backup features (if applicable).
Differential temperature measurement
To enable the differential temperature measurement feature of a dual-sensor 644 operating in
conjunction with the HART Tri-Loop, adjust the range end points of the corresponding channel
on the HART Tri-Loop to include zero. For example, if the secondary variable is to report the
differential temperature, configure the transmitter accordingly (see
variables" on page
end point is negative and the other is positive.
Hot Backup
To enable the Hot Backup feature of a 644 transmitter with dual-sensor option operating in
conjunction with the HART Tri-Loop, ensure that the output units of the sensors are the same as
the units of the HART Tri-Loop. Use any combination of RTDs or thermocouples as long as the
units of both match the units of the HART Tri-Loop.
Configuration
Right click on the device and select Configure.
In the left navigation window select Manual Setup.
On the HART tab find the Burst Mode Configuration group box and fill in the necessary
content.
Select Apply when complete.
16) and adjust the corresponding channel of the HART Tri-Loop so one range
HART 5
HART 7
2, 2, 8, 4
2, 2, 8, 5
16.
Section 2: Configuration
April 2015
"Mapping the HART
43

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