National Instruments FP-3000 Bedienungsanleitung PDF herunterladen (Seite 99)

Appendix C Fieldbus Parameters

FieldPoint FP-3000 User Manual C-22

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.

1 2 ... 94 95 96 97 98 99 100 101 102 103 104 ... 117 118

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National Instruments FP-3000 Bedienungsanleitung Seite 99