Reference Manual
00809-0200-4801, Rev CA
July 2010
A-7
Rosemount 3051S
SENSOR TRANSDUCER
BLOCK
The transducer block contains the actual measurement data, including a
pressure and temperature reading. The transducer block includes information
about sensor type, engineering units, linearization, reranging, temperature
compensation, and diagnostics.
Table A-2. Sensor Transducer
Block Parameters
Parameter Index Valid Range Initial Value Units Other Description
ST_REV 1 0-255 The revision level of the static data associated with the
function block.
TAG_DESC 2 spaces N/A The user description of the intended application of the block.
STRATEGY 3 0 N/A The strategy field can be used to identify grouping of blocks.
ALERT_KEY 4 1-255 0 N/A The identification number of the plant unit.
MODE_BLK 5 O/S N/A The actual, target, permitted, and normal modes of the block.
BLOCK_ERR 6 E Read
Only
This parameter reflects the error status associated with the
hardware or software components associated with a block. it is
a bit string, so that multiple errors may be shown.
UPDATE_EVT 7 N/A This alert is generated by any change to the staic data.
BLOCK_ALM 8 N/A The BLOCK_ALM is used for all configuration, hardware,
connection failure or system problems in the block. The cause
of the alert is entered in the subcode field. The first alert to
become active will set the Active status in the Status attribute.
As soon as the Unreported status is cleared by the alert
reporting task, another block alert may be reported without
clearing the Active status, if the subcode has changed.
TRANSDUCER_
DIRCTORY
9 0 N/A Read
Only
A directory that specifies the number and starting indicies of
the transducers in the transducer block.
TRANSDUCER_
TYPE
10 100 E Read
Only
Identifies the transducer that follows.
XD_ERROR 11 E Read
Only
Provides additional error codes related to transducer blocks.
COLLECTION_
DIRECTORY
12 N/A Read
Only
A directory that specifies the number, starting indicies, and DD
Item ID's of the data collections in each transducer block.
PRIMARY_
VALUE_TYPE
13 See Table 35
and footnote
0 E The type of measurement represented by the primary value.
PRIMARY_
VALUE
14 PVR Read
Only
The measured value and status available to the function block.
PRIMARY_
VALUE_RANGE
15 0-100% PVR Read
Only
The high and low range limit values, the engineering units
code and the number of digits to the right of the decimal point
to be used to display the final value.
CAL_POINT_HI 16 +INF CU The highest calibrated value.
CAL_POINT_LO 17 -INF CU The lowest calibrated value.
CAL_MIN_SPAN 18 0.0 CU Read
Only
The minimum calibration span value allowed. This minimum
span information is necessary to ensure that when calibration
is done, the two calibrated points are not too close together.
CAL_UNIT 19 See Table 19 % E The Device Description engineering units code index for the
calibration values.
SENSOR_TYPE 20 See Table 37
and footnote4
0 E The type of sensor connected with the transducer block.
SENSOR_RANG
E
21 0-100% SR Read
Only
The high and low range limit values, the engineering units
code and the number of digits to the right of the decimal point
for the sensor.
SENSOR_SN 22 N/A Read
Only
The sensor serial number.
SENSOR_CAL_
METHOD
23 See Table 40 0 E The method of last sensor calibration.
(16 paginas)
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