Emerson Rosemount 5408, Справочное руководство

Страница: 251 / 274

C.2 Device setup
C.2.1 HART protocol
HART/polling address
The address range is 0 to 63. The transmitter operates in either standard mode with a 4–
20 mA output signal or in multidrop. When the transmitter is in multi-drop mode, the
current output is fixed to 4 mA.
Burst mode
When set to burst mode, the transmitter regularly sends out messages instead of waiting
for the host to request it.
Both the transmitter and host must be configured to operate in burst mode. Almost all
HART host systems today are designed to communicate in poll/response mode, not burst
mode. However, the Rosemount 333 HART Tri-Loop
™
requires burst mode
communication.
Related information
Use with the Rosemount 333 HART Tri-Loop
Variable mapping
Up to four transmitter variables can be assigned for the HART protocol. The transmitter
outputs a 4-20 mA signal proportional to the primary variable. Additional variables are
available through the HART digital signal.
Related information
Output variables
Damping value
This parameter defines how fast the transmitter reacts to a change of the level value (step
response). The default value is 2 seconds.
A high value makes the level reading steady, while a low value allows the transmitter to
respond to rapid level changes (but the presented level value may be less steady).
Percent of range auxiliary
Set this parameter to output the percent of range for another transmitter variable (in
addition to the primary variable).
Reference Manual Configuration parameters
00809-0100-4408 February 2020
Rosemount 5408 and 5408:SIS Level Transmitters 251