Simulate Device Variables; Configuring Burst Mode - Emerson Rosemount 2051 Reference Manual

Reference Manual
00809-0100-4107, Rev CA
Figure 2-17. Performing an Analog Loop Test Using an LOI
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2.9.3

Simulate device variables

It is possible to temporarily set the to a user-defined fixed value for testing purposes. Once the
simulated variable method is left, the process variable will be automatically returned to a live
measurement. Simulate device variables is only available in HART Revision 7 mode.
Simulate digital signal with a Field Communicator
From the HOME screen, enter the Fast Key sequence
Device Dashboard Fast Keys
Simulate digital signal with AMS Device Manager
Right click on the device and select Service Tools.
1. Select Simulate.
2. Under Device Variables select a digital value to simulate.
a. Pressure
b. Sensor Temperature
c. Scaled Variable
3. Follow the screen prompts to simulate selected digital value.
2.10

Configuring burst mode

Burst mode is compatible with the analog signal. Because the HART 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, Scaled Variable, and/or
analog output), and does not affect the way other transmitter data is accessed. However, when
activated, bust mode can slow down communication of non-dynamic data to the host by 50 percent.
Access to information other than dynamic transmitter data is obtained through the normal
poll/response method of HART Protocol communication. A Field Communicator, AMS Device Manager,
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 Manager, or a control system to initiate a request.
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SET 4MA
SET 20MA
SET CUSTOM
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