Configure The Ai Block - Emerson 5301HxxxxxxxxxxxxxxZZ Series Reference Manual

Analog-Input Block
April 2019
OUT_D
VAR_SCAN
VAR_INDEX
J.9

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 J-4: AI Block Channels
AI block
Level
Ullage
Level rate
Signal strength
Volume
Internal temperature
Upper product volume 7
Lower product volume
Interface distance
Upper product
thickness
Interface level
Interface level rate
Interface signal
strength
Signal quality
Surface/noise margin
Vapor DC
466
Discrete output of the AI function block based on the detection of
process alarm condition(s). This parameter may be linked to other
function blocks that require a discrete input based on the detected alarm
condition.
Time period in seconds over which the variability index (VAR_INDEX) is
computed.
Process variability index measured as the integral of average absolute
error between PV and its mean value over the previous evaluation period.
This index is calculated as a percent of OUT span and is updated at the
end of the time period defined by VAR_SCAN.
TB channel value
1
2
3
4
5
6
8
9
10
11
12
13
14
15
16
Process variable
CHANNEL_RADAR_LEVEL
CHANNEL_RADAR_ULLAGE
CHANNEL_RADAR_LEVELRATE
CHANNEL_RADAR_SIGNAL_STRENGTH
CHANNEL_RADAR_VOLUME
CHANNEL_RADAR_INTERNAL_TEMPERATURE
CHANNEL_UPPER_PRODUCT_VOLUME
CHANNEL_LOWER_ PRODUCT_VOLUME
CHANNEL_INTERFACE_ DISTANCE
CHANNEL_UPPER_ PRODUCT_THICKNESS
CHANNEL_INTERFACE_LEVEL
CHANNEL_INTERFACE_ LEVELRATE
CHANNEL_INTERFACE_ SIGNALSTRENGTH
CHANNEL_SIGNAL_QUALITY
CHANNEL_ SURFACE_NOISE_MARGIN
CHANNEL_VAPOR_DC
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