Measurement Transducer Block - Emerson Rosemount 5408 Reference Manual

™
F Fieldbus Block Information
OUNDATION
June 2019
D.2.4 Status options
Status Options (STATUS_OPTS) supported by the AI block are shown below.
Propagate fault
forward
Uncertain if
limited
BAD if limited
Uncertain if Man
mode
Note
The instrument must be in Out of Service mode to set the status option.
D.2.5 Advanced features
The AI function block provides added capability through the addition of the following
parameters:
ALARM_TYPE Allows one or more of the process alarm conditions detected by the AI
OUT_D
VAR_SCAN
VAR_INDEX
D.3

Measurement Transducer block

The Measurement Transducer block contains the actual measurement data, including a
level and distance reading. The transducer block includes information about sensor type,
engineering units, and all parameters needed to configure the transmitter.
The name of the Measurement Transducer block is TB_1100_xxxx where "xxxx" represents
the serial number of the transmitter.
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If the status from the sensor is Bad, Device failure or Bad, Sensor
failure, propagate it to OUT without generating an alarm. The use of
these sub-status in OUT is determined by this option. Through this
option, the user may determine whether alarming (sending of an
alert) will be done by the block or propagated downstream for
alarming.
Set the output status of the Analog Input block to Uncertain if the
measured or calculated value is limited.
Set the output status to Bad if the sensor is violating a high or low
limit.
Set the output status of the Analog Input block to Uncertain if the
actual mode of the block is Man.
function block to be used in setting its OUT_D parameter.
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.
Reference Manual
00809-0300-4408
Reference Manual