OUT_D
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.
VAR_SCAN
Time period in seconds over which the variability index (VAR_INDEX) is
computed.
VAR_INDEX
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.
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 TB channel value Process variable
Level 1 CHANNEL_RADAR_LEVEL
Ullage 2 CHANNEL_RADAR_ULLAGE
Level rate 3 CHANNEL_RADAR_LEVELRATE
Signal strength 4 CHANNEL_RADAR_SIGNAL_STRENGTH
Volume 5 CHANNEL_RADAR_VOLUME
Internal temperature 6 CHANNEL_RADAR_INTERNAL_TEMPERATURE
Upper product volume 7 CHANNEL_UPPER_PRODUCT_VOLUME
Lower product volume 8 CHANNEL_LOWER_ PRODUCT_VOLUME
Interface distance 9 CHANNEL_INTERFACE_ DISTANCE
Upper product
thickness
10 CHANNEL_UPPER_ PRODUCT_THICKNESS
Interface level 11 CHANNEL_INTERFACE_LEVEL
Interface level rate 12 CHANNEL_INTERFACE_ LEVELRATE
Interface signal
strength
13 CHANNEL_INTERFACE_ SIGNALSTRENGTH
Signal quality 14 CHANNEL_SIGNAL_QUALITY
Surface/noise margin 15 CHANNEL_ SURFACE_NOISE_MARGIN
Vapor DC 16 CHANNEL_VAPOR_DC
Analog-Input Block Reference Manual
April 2019 00809-0100-4530
466 Rosemount 5300 Level Transmitter
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