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3.3
Input Selector Block (IS)
The Input Selector (IS) function block can be used to select
the first good, maximum, minimum, or average of as many
as four input values and place it at the output. The block
supports signal status propagation. (There is no process
alarm detection in the Input Selector function block.)
ST_REV
: The revision level of the static data associated
with the function block. The revision value will be incre-
mented each time a static parameter value in the block is
changed.
TAG_DESC
: The user description of the intended applica-
tion of the block.
STRATEGY
: The strategy field can be used to identify
grouping of blocks. This data is not checked or processed by
the block.
ALERT_KEY
: The identification number of the plant unit.
This information may be used in the host for sorting
alarms, etc.
MODE_BLK
: The actual, target, permitted, and normal
modes 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
BLOCK_ERR
: This parameter reflects the error status
associated with the hardware or software components associ-
ated with a block. It is a bit string, so that multiple errors
may be shown.
OUT
: The block output value and status.
OUT_RANGE
: High and low scale values, engineering
units code, and number of digits to the right of the decimal
point associated with OUT
GRANT_DENY
: Options for controlling access of host
computers and local control panels to operating, tuning,
and alarm parameters of the block.
STATUS_OPTIONS
: Allows you to select options for
status handling and processing. The supported status
options for the input selector block are: “Use Uncertain as
Good”, “Uncertain if Man mode.”
IN_1
: The block input value and status.
58-641 PULSAR Model R86 Pulse Burst Radar Transmitter - F
OUNDATION
fieldbus
™
Instruction Manual