Reference Manual
00809-0100-4697, Rev EA
October 2011
Rosemount 848T
D-10
Functionality Simulation
To support testing, either ch ange the mode of the block to manual and adjust
the output value or enable simulation through the configuration tool and
manually enter a value for the measurement value and its status (this single
value will apply to all outputs). In both cases, first set the ENABLE jumper on
the field device.
NOTE
All FOUNDATION fieldbus instruments have a simulation jumper. As a safety
measure, the jumper has to be reset ever y time there is a power interruption.
This measure is to prevent devices that went through simulation in the staging
process from being installed with simulation enabled.
With simulation enabled, the actual measurement value has no impact on the
OUT value or the status. The OUT values will all have the same value as
determined by the simulate value.
19 XD_SCALE None 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. It will automatically change units in the STB block to the last one written.
Multiple blocks reading the same channel may conflict (only one unit type per
channel).
20 OUT_SCALE None The high and low scale values, engineering unit code and number of digits to the
right of the decimal point associated with OUT.
21 GRANT_DENY None Options for controlling access of host computers and local control panels for
operating, tuning, and alarm parameters of the block. Not used by device.
22 IO_OPTS None Allows the selection of input/output options used to alter the PV. Low cutoff enabled
is the only selectable option.
23 STATUS_OPTS None Allows the user to select options for status handling and processing. The options
supported in the MAI block are the following:
• Propagate fault forward
• Uncertain if limited
• Bad if limited
• Uncertain if manual mode
24 L_TYPE None Linearization type. Determines whether the field value is uses directly (Direct), is
converted linearly (Indirect), or is converted with the square root ( Indirect Square
Root)
25 LOW_CUT %If percentage value of the sensor transducer input falls below this, PV = 0
26 PV_FTIME Seconds The time constant of the first-order PV filter. It is the time required for a 63% change
in the IN value.
27, 28, 29,
30, 31, 32,
33, 34
CHANNEL_(1, 2,
3,4 5, 6, 7, 8) None The CHANNEL (1, 2, 3, 4, 5, 6, 7, 8) value is used to select the measurement
value. See Table D-4 on page D-6 for available channels. Configure the CHANNEL
parameters to custom (2) before configuring the CHANNEL parameters.
35, 36, 37,
38, 39, 40,
41, 42
STDDEV_(1, 2, 3,
4, 5, 6, 7, 8) % of OUT Range Standard deviation of the corresponding measurement.
43, 44, 45,
46, 47, 48,
49, 50
CAP_STDDEV_(1
, 2, 3, 4, 5, 6, 7, 8) % of OUT Range Capability standard deviation, the best deviation that can be achieved.
Table D-4. Multiple Analog Input Function Block Parameters
Number Parameter Units Description