Emerson 644 manual AI Parameter Table, Ackoption

Reference Manual

00809-0400-4728, Rev AA June 2011

Rosemount 644

AI Parameter Table

Table C-3. Definitions of Analog Input Function Block System Parameters

	Index
Parameter	No.	Available Values	Units	Default	Read/Write	Description
ACK_OPTION	23	0 = Auto Ack Disabled	None	0 all Disabled	Read and Write	Used to set auto acknowledgment of alarms.
		1 = Auto Ack Enabled
ALARM_HYS	24	0 – 50	Percent	0.5	Read and Write	The amount the alarm value must return within
						the alarm limit before the associated active alarm
						condition clears.
ALM_SEL	38	HI_HI, HI, LO, LO_LO	None	Non selected	Read and Write	Used to select the process alarm conditions that
						will cause the OUT_D parameter to be set.
ALARM_SUM	22	Enable/Disable	None	Enable	Read and Write	The summary alarm is used for all process
						alarms 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.
ALERT_KEY	04	1 – 255	None	0	Read and Write	The identification number of the plant unit. This
						information may be used in the host for sorting
						alarms, etc.
BLOCK_ALM	21	Not applicable	None	Not applicable	Read only	The block alarm 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 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	Not applicable	None	Not applicable	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.
CAP_STDDEV	40	> = 0	Seconds	0	Read and Write	The time over which the VAR_INDEX is
						evaluated.
CHANNEL	15	1 = Pressure	None	AI(1): Channel = 1	Read and Write	The CHANNEL value is used to select the
		2 = Housing		AI2: Channel = 2		measurement value. Refer to the appropriate
		temperature				device manual for information about the specific
						channels available in each device.
						You must configure the CHANNEL parameter
						before you can configure the XD_SCALE
						parameter.
FIELD_VAL	19	0 – 100	Percent	Not applicable	Read only	The value and status from the transducer block
						or from the simulated input when simulation is
						enabled.
GRANT_DENY	12	Program	None	Not applicable	Read and Write	Normally the operator has permission to write to
		Tune				parameter values, but Program or Local remove
		Alarm				that permission and give it to the host controller
		Local				or a local control panel.
HI_ALM	34	Not applicable	None	Not applicable	Read only	The HI alarm data, which includes a value of the
						alarm, a timestamp of occurrence and the state
						of the alarm.
HI_HI_ALM	33	Not applicable	None	Not applicable	Read only	The HI HI alarm data, which includes a value of
						the alarm, a timestamp of occurrence and the
						state of the alarm.
HI_HI_LIM	26	Out_Scale(2)	Out_Scale(2)	Not applicable	Read and Write	The setting for the alarm limit used to detect the
						HI HI alarm condition.
HI_HI_PRI	25	0 – 15	None	1	Read and Write	The priority of the HI HI alarm.
HI_LIM	28	Out_Scale(2)	Out_Scale(2)	Not applicable	Read and Write	The setting for the alarm limit used to detect the
						HI alarm condition.
HI_PRI	27	0 – 15	None	1	Read and Write	The priority of the HI alarm.
IO_OPTS	13	Low Cutoff	None	Disable	Read and Write	Allows the selection of input/output options used
		Enable/Disable				to alter the PV. Low cutoff enabled is the only
						selectable option.
L_TYPE	16	Direct	None	Direct	Read and Write	Linearization type. Determines whether the field
		Indirect				value is used directly (Direct), is converted
		Indirect Square Root				linearly (Indirect), or is converted with the square
						root (Indirect Square Root).

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