All the Attributes
calculations work of the Attribute Archive and this should be populated for the
point(s) being used.
Calculation will use the
appropriate Attribute Archive value for the timestamp being created by the
calculator.
It is sensible that for
every Standard Data timestamp record belonging to the point there is a
corresponding Attribute Archive record for the timestamp also but this is not
required.
PropTime
For example,
PropTimeDiff[{P1628903}; LAST_SERVICE; d]
First parameter is the
point ident, second parameter is the Attribute name, third parameter represents
the time units to be used and should be changed by the user if necessary.
Options for time units
are represented by: yyyy (years), m (months), d (days), h (hours), n (minutes),
s (seconds).
The Attribute Archive
values should be in one of the following formats: yyyy-mm-dd, yyyy-mm-dd hh:mm,
yyyy-mm-dd hh:mm:ss.
Returns an integer
representing the time difference between the Attribute value and the
calculation time.
PropNumeric
For example,
PropVal[{P1628903}; SCALE_FACTOR].
First parameter is the
point ident, second parameter is the Attribute name.
Returns the numeric value
of the appropriate Attribute Archive value record.
The returned numeric
value can be used directly as part of a calculation or within the ‘If’
statement of a conditional calculation.
PropText
For example,
PropText[{P1628903}; METER_SERIAL; RZ321].
First parameter is the
point ident, second parameter is the Attribute name, third parameter is the
text the Attribute Archive value will be compared to.
The third parameter can
contain ‘%’ for wildcard matching e.g. 123%, RZ3%, etc.
Returns a 1 when the
appropriate Attribute Archive value matches the third parameter, otherwise it
returns 0.
