Revision 2.0 FOUNDATION Fieldbus ST 700 Pressure Transmitter User's Guide Page 49
OUT status
The following table provides the resulting status of AI block OUT for a given status of
PRIMARY_VALUE in the transducer block.
If . . . Then . . .
PRIMARY_VALUE status =
Good::[alarm status]:Not
Limited
OUT value is tested against OUT_SCALE range values:
If OUT value is within the OUT_SCALE range, then OUT status
= Good Non Cascade::[alarm status]:Not Limited
If OUT exceeds OUT_SCALE range, then OUT status =
Uncertain:: Engineering Units Range Violation:& High or Low
Limited
PRIMARY_VALUE status =
Uncertain
OUT status = Uncertain
2
nd
field in the
PRIMARY_VALUE status =
Non Specific
OUT status = Non Specific
PRIMARY_VALUE status =
High or Low
OUT status = High or Low
Parameters List
Table 12: Analog Input block parameters
Parameter Description
ST_REV The revision level of the static data associated with the function block. The
revision value is incremented each time a static parameter value in the
block is changed.
TAG_DESC The user description of the application of the block.
STRATEGY It is 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, and so on.
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 associated with a block. It is a bit string, so that
multiple errors may be shown.
PV The process variable used in block execution.
OUT The block output value and status.
SIMULATE A group of data that contains the current transducer value and status, the
simulated transducer value and status, and the enable/disable bit.
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