Emerson Rosemount 5900C, Справочное руководство

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4.11 Analog Input block
4.11.1 Configure the AI block
A minimum of four parameters are required to configure the AI block. The parameters
are described below with example configurations shown at the end of this section.
CHANNEL
Select the channel that corresponds to the desired sensor measurement:
Table 4-5: AI Block Channels for the Rosemount 5900C
AI Block Parameter TB Channel Value Process Variable
Level 1 CHANNEL_LEVEL
Distance 2 CHANNEL_DISTANCE
Level Rate 3 CHANNEL_LEVELRATE
Signal Strength 4 CHANNEL_SIGNAL_STRENGTH
Internal Temperature 5 CHANNEL_HOUSING_TEMPERA
TURE
Volume 6 CHANNEL_VOLUME
L_TYPE
The L_TYPE parameter defines the relationship of the transmitter measurement (Level,
Distance, Level Rate, Signal Strength, Internal Temperature, and Volume) to the desired
output of the AI Block. The relationship can be direct, indirect, or indirect root.
Direct Select direct when the desired output will be the same as the transmitter
measurement (level, distance, level rate, signal strength, volume, and
internal temperature).
Indirect Select indirect when the desired output is a calculated measurement based
on the transmitter measurement (level, distance, level rate, signal
strength, volume, and internal temperature). The relationship between the
transmitter measurement and the calculated measurement will be linear.
Indirect
square root Select indirect square root when the desired output is an inferred
measurement based on the transmitter measurement and the relationship
between the sensor measurement and the inferred measurement is square
root.
XD_SCALE and OUT_SCALE
The XD_SCALE and OUT_SCALE each include three parameters: 0%, 100%, and
engineering units. Set these based on the L_TYPE:
L_TYPE is
direct When the desired output is the measured variable, set the XD_SCALE to
represent the operating range of the process. Set OUT_SCALE to match
XD_SCALE.
Configuration Reference Manual
September 2019 00809-0100-5901
162 Reference Manual