Rosemount 848T

Reference Manual

00809-0100-4697, Rev EA October 2011

Table D-6. Input Selector Function Block Parameters

Number

Parameter

Units

Description

15, 16, 17,

DISABLE_(1, 2,

None

A connection from another block that disables the associated input from the selection.

18, 29, 30,

3, 4, 5, 6, 7, 8)

 

 

31, 32

 

 

 

19

SELECT_TYPE

None

Specifies input selection method. Methods available include: First Good, Minimum,

 

 

 

Maximum, Middle, Average, or Hot Backup.

20

MIN_GOOD

None

The minimum number of good inputs.

21

SELECTED

None

The selected input number (1 to 8) or the number of input used for the average output.

22

OP_SELECT

None

Overrides the algorithm to select 1 of the 8 inputs regardless of the selection type.

23

UPDATE_EVT

None

This alert is generated by any change to the static data

24

BLOCK_ALM

None

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 may be reported

 

 

 

without clearing the Active status, if the subcode has changed.

33

AVG_USE

None

Number of parameters to use in the averaging calculation. For example, if AVG_USE is

 

 

 

4 and the number of connected inputs is 6, then the highest and lowest values would

 

 

 

be dropped prior to calculating the average. If AVG_USE is 2 and the number of

 

 

 

connected inputs is 7, then the two highest and lowest values would be dropped prior

 

 

 

to calculating the average and the average would be based on the middle three inputs.

34

ALARM_SUM

None

The current alert status, unacknowledged states, and disabled states of the alarms

 

 

 

associated with the function block.

35

ACK_OPTION

None

Used to set automatic acknowledgement of alarms.

36

ALARM_HYS

Percent

The amount the alarm value must return within the alarm limit before the associated

 

 

 

active alarm condition clears

37

HI_HI-PRI

None

The priority of the HI HI alarm

38

HI_HI_LIM

Percent

The setting for the alarm limit used to detect the HI HI alarm condition.

39

HI_PRI

None

The priority of the HI alarm

40

HI_LIM

EU of IN

The setting for the alarm limit used to detect the HI alarm condition

41

LO_PRI

None

The priority of the LO alarm

42

LO_LIM

EU of IN

The setting of the alarm limit used to detect the LO alarm condition

43

LO_LO_PRI

None

The priority of the LO LO alarm

44

LO_LO_LIM

EU of IN

The setting for the alarm limit sued to detect the LO LO alarm condition

45

HI_HI_ALM

None

The HI HI alarm data, which includes a value of the alarm, a timestamp of occurrence

 

 

 

and the state of the alarm

46

HI_ALM

None

The HI alarm data, which includes a value of the alarm, a timestamp of occurrence and

 

 

 

the state of the alarm

47

LO_ALM

None

The LO alarm data, which includes a value of the alarm, a timestamp of occurrence

 

 

 

and the state of the alarm

48

LO_LO_ALM

None

The LO LO alarm data, which includes a value of the alarm, a timestamp of occurrence

 

 

 

and the state of the alarm

49

OUT_D

None

Discrete output to indicate a selected alarm value

50

ALM_SEL

None

Used to select the process alarm conditions that will cause the OUT_D parameter to

 

 

 

be set.

D-16

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Emerson 848T manual Selecttype, Mingood, Selected, Opselect, Avguse, Hihi-Pri

848T specifications

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