27
The nine arithmetic functions are:
• Flow Compensation Linear
• Flow Compensation Square Root
• Flow Compensation Approximate
• Btu Flow
• Traditional Multiply and Divide
• Average
• Summer
• Fourth Order Polynomial
• Simple HTG Compensate Level
ST_REV
: The revision level of the static data associated
with the function block. The revision value will increment
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, ad 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.
PV
: The primary analog value for use in executing the
function, or a process value associate with it.
OUT
: The analog output value and status.
PRE_OUT
: Displays what would be the OUT value if the
mode was “Auto” or lower.
PV_SCALE
: Associated with the PV.
OUT_RANGE
: The high and low scale values, engineering
units code, and number of digits to the right of the decimal
point associated with OUT.
BE57-646 ECLIPSE Guided Wave Radar Transmitter - F
OUNDATION
fieldbus
™
