Emerson Rosemount 848T, Reference Manual, Page: 124 / 136

114
Reference Manual
00809-0100-4697, Rev GA
Appendix D: Function Blocks
November 2014
Function Blocks
6 BLOCK_ERR None 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.
7 OUT OUT_RANGE The primary analog value calculated as a result of
executing the function block.
8 OUT_RANGE EU of OUT The engineering units code to be used in displaying the
OUT parameter and parameters which have the same
scaling as OUT.
9 GRANT_DENY None Options for controlling access of host computers and
local control panels to operating, tuning, and alarm
parameters of the block. Not used by device.
10 STATUS_OPTS None Allows the user to select options for status handling and
processing.
11,1 2,
13, 14,
25, 26,
27, 28
IN_(1, 2, 3, 4,
5, 6, 7, 8)
Determined
by source
A connection input from another block
15, 16,
17, 18,
29, 30,
31, 32
DISABLE_(1,
2, 3, 4, 5, 6, 7,
8)
None A connection from another block that disables the
associated input from the selection.
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 acknowledgment of alarms.
Table D-6. Input Selector Function Block Parameters
Number Parameter Units Description