Burst Mode - Emerson Rosemount 4600 Reference Manual

Reference Manual
00809-0100-4022, Rev GA
2.10.2

Burst mode

Fast Keys
When configured for burst mode, the Rosemount 4600 provides faster digital communication
from the transmitter to the control system by eliminating the time required for the control
system to request information from the transmitter. Burst mode is compatible with the analog
signal. Because the HART protocol features simultaneous digital and analog data transmission,
the analog value can drive other equipment in the loop while the control system is receiving the
digital information. Burst mode applies only to the transmission of dynamic data (pressure and
temperature in engineering units, pressure in percent of range, and/or analog output), and does
not affect the way other transmitter data is accessed.
Access to information other than dynamic transmitter data is obtained through the normal
poll/response method of HART communication. A Field Communicator, AMS Device Manger or
the control system may request any of the information that is normally available while the
transmitter is in burst mode. Between each message sent by the transmitter, a short pause
allows the Field communicator, AMS Device Manger or a control system to initiate a request.
The transmitter will receive the request, process the response message, and then continue
"bursting" the data approximately three times per second.
Field Communicator
To configure the transmitter for burst mode, perform the following step:
1.
AMS Device Manger
Right click on the device and select Configuration Properties from the menu.
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2.
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Configuration
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1, 4, 3, 3, 3
From the HOME screen, enter the Fast Key sequence below Burst Mode.
In the HART tab, use the drop down menu to select Burst Mode ON or OFF. For Burst
option select the desired properties from the drop down menu. Burst options are as
follows:
PV
% range/current
Process vars/crnt
Process variables
After selecting options, select Apply.
An Apply Parameter Modification screen appears, enter desired information and select
OK.
After carefully reading the warning provided, select OK.
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Configuration
September 2016
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