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F
Fieldbus
™
OUNDATION
December 2022
Table 8-19: Definitions of AI Function Block System Parameters
Parameter
ST_REV
TAG_DESC
UPDATE_EVT
VAR_INDEX
VAR_SCAN
XD_SCALE
8.8.2
Simulation
To support testing, you can either change the mode of the block to Manual and
adjust the output value, or you can enable simulation through the configuration
tool and manually enter a value for the measurement value and its status.
With simulation enabled, the actual measurement value has no impact on the
OUT value or the status.
152
Index number
01
02
20
39
40
10
(continued)
Units
None
None
None
% of OUT Range
Seconds
None
Manual
00809-0500-4880
Description
The revision level of the
static data associated
with the function block.
The revision value will be
incremented each time a
static parameter value in
the block is changed.
The user description of
the intended application
of the block.
This alert is generated by
any change in the static
data.
The average absolute
error between the PV and
its previous mean value
over that evaluation time
defined by VAR_SCAN.
The time over which the
VAR_INDEX is evaluated.
The high and low scale
values, engineering units
code, and number of
digits to the right of the
decimal point associated
with the channel input
value.
The XD_SCALE units code
must match the units
code of the measurement
channel in the transducer
block. If the units do not
match, the block will not
transition to MAN or
AUTO.
Emerson.com/Rosemount
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