Appendix C Fieldbus Parameters
FieldPoint FP-3000 User Manual C-22
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National Instruments Corporation
UPDATE_EVT
The current state of the update event, along with a time and date stamp. This
event is issued whenever a static parameter is changed and ST_REV is
incremented.
WRITE_ALM
The current state of the low alarm, along with a time and date stamp.
WRITE_LOCK
The software write lock for the device. When this is set to true, writes to all
configuration parameters of all blocks are disallowed. The WRITE_ALM
block alarm is active when writes are allowed and clear when they are
disallowed.
WRITE_PRI
The priority of the write alarm.
XD_SCALE
The scaling parameter used to interpret values from the physical I/O
channel. This is used to translate from a physical transducer value to a
percent of scale.
Table C-16. Scaling Parameter Values
Subfield Meaning
EU_100 Engineering units value at 100 percent of scale.
EU_0 Engineering units value at zero percent of scale.
UNIT_INDEX Actual engineering units code (such as mA).
DECIMAL Number of digits a host shows to the right of the
decimal for display purposes.