Rockwell-automation FactoryTalk Historian SE DataLink 4.2 User Guide Manuel d'utilisateur télécharger pdf (Page 153)

9 ● FactoryTalk Historian DataLink Function Reference

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PIPropertyToValue()

Retrieves the value of a specified FactoryTalk Historian point property,

using the following syntax:

PIPropertyToValue(property, modulepath, querydate, PIServer,

outcode)

Arguments

Argument

Explanation

Property (string)

The module database property corresponding to the desired

FactoryTalk Historian point.

modulepath (string)

The full module path to the property.

querydate (integer)

A date limit such that only properties created at or after the date are

returned.

PIServer (string)

The target FactoryTalk Historian server.

Outcode (integer)

An ouput code, either 0, 1, or 2.

Returns

 An output code (page 104) of 0 displays the value of the property in a

column.

 An output code of 2 displays the value of the property in a row.

Example:

The following returns the value corresponding to the Implementer property

of module Reactor1 which is a submodule of Unit1. Unit1 is at the root of

the module database for a FactoryTalk Historian server named thevax.

The module database is queried at current time.

=PIPropertyToValue("Implementer","\Unit1\Reactor1","*","theva

x")

1 2 ... 148 149 150 151 152 153 154 155 156 157 158 ... 163 164

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Rockwell-automation FactoryTalk Historian SE DataLink 4.2 User Guide Manuel d'utilisateur Page 153