Emerson 644 manual Sensor Transducer Block, Parameters Descriptions

Reference Manual

00809-0400-4728, Rev AA June 2011

Rosemount 644

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.

Parameters and

Descriptions

Table C-2. Sensor Transducer Block Parameters and Descriptions

	Index		Notes on how changing this parameter
Parameter	Number	Description	effects transmitter operation.
ALERT_KEY	04	The identification number of the plant unit.	No effect on operation of transmitter but may
			affect the way alerts are sorted on the host end.
BLOCK_ALM	08	The block alarm is used for all configuration,	No effect.
		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 parameter. 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.
BLOCK_ERR	06	This parameter reflects the error status	No effect.
		associated with the hardware or software
		components associated with a block. It is a bit
		string, so that multiple errors may be shown.
CAL_MIN_SPAN	18	The minimum calibration span value allowed.	No effect.
		This minimum span information is necessary to
		ensure when calibration is done, the two
		calibrated points are not too close together.
CAL_POINT_HI	16	The highest calibrated value.	Assigns a value to the calibration high point.
CAL_POINT_LO	17	The lowest calibrated value.	Assigns a value to the calibration low point.
CAL_UNIT	19	The device description engineering units code	Device must be calibrated using the appropriate
		index for the calibration values.	engineering units.
COLLECTION_DIRECTORY	12	A directory that specifies the number, starting	No effect.
		indices, and DD Item ID's of the data collections
		in each transducer.
ASIC_REJECTION	42	Indicates the type of material that the drain
		vents on the flange are made of. See Drain Vent
		Material Codes.
FACTORY_CAL_RECALL	32	Recalls the sensor calibration set at the factory.
USER_2W_OFFSET	36	Indicates the type of material that the flange is
		made of. See Flange Material Codes.
INTER_DETECT_THRESH	35	Indicates the type of flange that is attached to
		the device. See Flange Type Codes.
MODE_BLK	05	The actual, target, permitted, and normal modes	Assigns the device mode.
		of the block.
		Target: The mode to “go to”
		Actual: The mode the “block is currently in”
		Permitted: Allowed modes that target may take
		on
		Normal: Most common mode for target
CALIBRATOR_MODE	33	Indicates the type of sensor module.
PRIMARY_VALUE	14	The measured value and status available to the	No effect.
		function block.

C-5