Emerson MICRO MOTION 2700 Instrukcja Instalacji Strona 109

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Transmitter Configuration and Use: Series 1000 and 2000 Transmitters 99
Optional Configuration continued
Required Configuration Optional ConfigurationUsing the TransmitterFlowmeter Startup
8.15.5 Configuring HART burst mode
Burst mode is a specialized mode of communication during which the transmitter
regularly broadcasts HART digital information over the primary mA output. Burst
mode is ordinarily disabled, and should be enabled only if another device on the
network requires HART burst mode communication.
To configure burst mode:
1. Enable burst mode.
2. Specify the burst mode output. Options are described in Table 8-11.
3. If you specified
Transmitter vars or Fld dev var in Step 2, use ProLink II or the 375 Field
Communicator to specify the four process variables to be sent in each burst.
Note: If you are using the 275 HART Communicator to configure the transmitter, you cannot change
the default.
Table 8-11 Burst mode output options
Parameter
DefinitionProLink II label Communicator label
Primary variable PV The transmitter repeats the primary variable (in measurement
units) in each burst (e.g., 14.0 g/s, 13.5 g/s, 12.0 g/s).
PV current & % of range % range/current The transmitter sends the PV’s percent of range and the PV’s
actual mA level in each burst (e.g., 25%, 11.0 mA).
Dynamic vars & PV
current
(1)
(1) This burst mode setting is typically used with the HART Tri-Loop
signal converter. See the Tri-Loop manual for additional
information.
Process
variables/current
The transmitter sends PV, SV, TV, and quaternary variable (QV)
values in measurement units and the PV’s actual milliamp
reading in each burst (e.g., 50 lb/min, 23
°
C, 50 lb/min,
0.0023 g/cm
3
, 11.8 mA).
Transmitter vars Fld dev var The transmitter sends four process variables in each burst. See
Step 3.
Model 1500 AN
Model 1700 AN
Model 1700 IS
Model 2500 CIO
Model 2700 AN
Model 2700 IS
Model 2700 CIO
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