GE DigitalFlow GS868, Руководство для стартапов

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Operation 3-7
March 2008
Foundation Fieldbus
Communications
Foundation Fieldbus provides a means of communicating with the
flowmeter. The patent numbers which apply are 5,909,363 and
6,424,872.
This Foundation Fieldbus device supports 2 Analog Input (AI)
blocks, which can be configured to supply the following
measurements on the network (see Table 3-3 below).
Table 3-3: Available Measurements Using a Foundation Fieldbus Device
Channel 1 Units Channel 1 Units Channel 1 Units
Ch1 Velocity ft/s or m/s* Ch1 Mass Flow MASS_U Ch1 SSUP none
Ch1 Act Volumetric VOL_U
Ch1 Fwd Mass Totals
MTOT_U Ch1 SSDN none
Ch1 Std Volumetric VOL_U Ch1 Rev Mass Totals MTOT_U Ch1 Sound Speed ft/s or m/s*
Ch1 Fwd Totals TOT_U
Ch1 #Mass Tot Digits
none Ch1 Density*** see note
Ch1 Rev Totals TOT_U Ch1 Timer sec Ch1 Temperature Deg F or C*
Ch1 #Tot Digits** none Ch1 Error Code none Ch1 Pressure PRESS_U
*Metric or English units are determined by the setup of the flowmeter.
**Totalizer digits are available for informational purposes only. Respective totals are automatically scaled
by the Tot Digits value selected in the flowmeter setup.
***If the meter is outputting Mole Weight, the unit is “mw”, otherwise it is the programmed pressure unit.
VOL_U, TOT_U, MASS_U, MTOT_U and PRESS_U are determined by the units chosen for these measure-
ments in the flowmeter setup. See the instrument User's Manual for the setup of these parameters.