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Asset Framework and PI System Explorer (PI Server 2018)

Data reference parameters that specify values to return

Data reference parameters that specify values to return

  • Last UpdatedDec 13, 2024
  • 1 minute read

Configuration strings for PI point data references can include optional parameters that specify the value that the data reference returns. The following table lists available parameters:

Parameter

Syntax

Example

Default

TimeMethod

TimeMethod=time_method

where time_method is one of:

  • After

  • AtOrAfter

  • Before

  • AtOrBefore

  • Automatic

  • ExactTime

  • Interpolated

  • NotSupported

  • TimeRange

  • TimeRangeOverride

TimeMethod=Automatic

Automatic

RelativeTime

RelativeTime=[*] +|- integertime_unit

where time_unit is one of:

  • y

  • M

  • d

  • h

  • m

  • s

RelativeTime=-1h

N/A

TimeRangeMethod

TimeRangeMethod=method_name

where method_name is one of

  • Average

  • Count

  • Delta

  • EndTime

  • Maximum

  • Minimum

  • PopulationStandardDeviation

  • Range

  • StandardDeviation

  • StartTime

  • Total

TimeRangeMethod=Total

EndTime

TimeRangeMinPercentGood1

TimeRangeMinPercentGood= percentage

80

CalculationBasis1

CalculationBasis= calculation_basis

where calculation_basis is one of:

  • EventWeighted

  • EventWeightedExcludeEarliestEvent

  • EventWeightedExcludeMostRecentEvent

  • EventWeightedIncludeBothEnds

  • TimeWeighted

  • TimeWeightedContinuous

  • TimeWeightedDiscrete

TimeWeighted

RateConversion2

RateConversion=uom

where uom is a defined unit of measure

RateConversion=minute

day

UOM

UOM=uom

where uom is a defined unit of measure

UOM=°C

Attribute's Default UOM

ReadOnly

ReadOnly=boolean

where boolean is one of:

  • true

  • false

ReadOnly=false

true

1 Used when specifying TimeRangeMethod.

2 Used only when TimeRangeMethod=Total.

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