Analog Input Block; Configure The Ai Block - Emerson Rosemount 5900S Series Reference Manual

Reference Manual
00809-0100-5900, Rev CA
June 2014
4.11 ANALOG INPUT
BLOCK
4.11.1 Configure the AI
Block
Table 4-5. AI block channels for
the 5900S
Section 4. Configuration
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:
AI Block Parameter TB Channel Value Process Variable
Level
Distance
Level Rate
Signal Strength
Internal Temperature
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 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.
Rosemount 5900S Series
1 CHANNEL_LEVEL
2 CHANNEL_DISTANCE
3 CHANNEL_LEVELRATE
4 CHANNEL_SIGNAL_STRENGTH
5 CHANNEL_HOUSING_TEMPERATURE
6 CHANNEL_VOLUME
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