Emerson 848T manual Xdscale, CAPSTDDEV1

Rosemount 848T

Reference Manual

00809-0100-4697, Rev EA October 2011

Table D-4. Multiple Analog Input Function Block Parameters

Number	Parameter	Units	Description
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,	CHANNEL_(1, 2,	None	The CHANNEL (1, 2, 3, 4, 5, 6, 7, 8) value is used to select the measurement
30, 31, 32,	3,4 5, 6, 7, 8)		value. See Table D-4 on page D-6for available channels. Configure the CHANNEL
33, 34			parameters to custom (2) before configuring the CHANNEL parameters.
35, 36, 37,	STDDEV_(1, 2, 3,	% of OUT Range	Standard deviation of the corresponding measurement.
38, 39, 40,	4, 5, 6, 7, 8)
41, 42
43, 44, 45,	CAP_STDDEV_(1	% of OUT Range	Capability standard deviation, the best deviation that can be achieved.
46, 47, 48,	, 2, 3, 4, 5, 6, 7, 8)
49, 50

FunctionalitySimulation

To support testing, either change 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 every 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.

D-10