Rockwell-automation FactoryTalk Historian SE DataLink 4.2 User Guide Manual de usuario descargar pdf (Pagina 154)

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FactoryTalk Historian DataLink User Guide

146

Input Functions

PIPutVal()

PIPutVal(tagname, value, time stamp, PIServer, outcell)

PIPutVal supports all FactoryTalk Historian 3 data types (including

string input to string tags), as well as sub-second data. Time stamps are

interpreted using client machine time zone information for FactoryTalk

Historian 3 unless the Use PI Server Time Zone is enabled.

Arguments

Argument

Explanation

tagname (string)

The tag for which you to write the value to FactoryTalk Historian.

value (reference)

The reference to a value to be written, either a string (for digital

states) or a number.

time stamp (string)

A time stamp in FactoryTalk Historian time format.

PIServer (string)

The target FactoryTalk Historian server.

outcell (reference)

A reference to a cell in which the return value of this macro function

is displayed.

Returns

Returns the string value False if the macro function fails and writes an

error message to the outcell. If the write to the FactoryTalk Historian

server succeeds, the string True is returned and the status is written to the

outcell.

PIPutVal() does not verify the user-specified range for a tag before writing.

The range is defined from zero to zero + span, where zero and span are tag

attributes specified during point (tag) creation. FactoryTalk Historian DataLink

returns a value even though

Over Range

Under Range

may be entered in

FactoryTalk Historian.

Example:

1 2 ... 149 150 151 152 153 154 155 156 157 158 159 ... 163 164

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Rockwell-automation FactoryTalk Historian SE DataLink 4.2 User Guide Manual de usuario Pagina 154