Emerson Rosemount 5900S Series, Справочное руководство

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Table C-3: Definitions of Analog Input Function Block System Parameters
(continued)
Index Number Parameter Units Description
38 ALARM_SEL None Used to select the process alarm conditions that will cause the
OUT_D parameter to be set.
39 STDDEV Percent The average absolute error between the PV and its previous mean
value over that evaluation time defined by VAR_SCAN.
40 CAP_STDDEV Seconds The time over which the VAR_INDEX is evaluated.
C.2.1 Simulation
To perform lab test of process variables and alerts, you can either change the mode of the
AI 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. In
both cases, you must first set the SIMULATE switch (1) on the field device to the ON
position, see
Simulation .
With simulation enabled, the actual measurement value has no impact on the OUT value
or the status.
C.3 Analog Output block
Figure C-3: Analog-Output Block
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A. CAS_IN = The remote setpoint value from another function block
B. BKCAL_OUT = The value and status required by the BKCAL_IN input of another block to
prevent reset windup and to provide bumpless transfer to closed loop control.
C. OUT = The block output value and status
The Analog Output (AO) function block assigns an output value to a field device through a
specified I/O channel. The block supports mode control, signal status calculation, and
simulation.
Table C-4 lists the definitions of the system parameters. See also Analog
Output block .
Table C-4: Analog Output Function Block System Parameters
Parameter Units Description
BKCAL_OUT EU of PV_SCALE The value and status required by the BKCAL_IN input of
another block to prevent reset windup and to provide
bumpless transfer to closed loop control.
Reference Manual F
OUNDATION
™
Fieldbus Block Information
00809-0100-5900 September 2019
Rosemount 5900S Radar Level Gauge 277