Rockwell-automation FactoryTalk Historian SE DataLink 4.2 User Guide Uživatelský manuál stáhnout pdf (Strana 50)

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FactoryTalk Historian DataLink User Guide

Special Notes

You can use a

PI Expression

(page 91) instead of a tag name for this

function.

Reference a range of tag names to display sampled values for each.

Note that by default, values are displayed in rows for a column of

referenced tags, and in columns for a row of referenced tags.

For tags with step attributes, the value preceding a specified time

stamp is substituted for an interpolated value when the calculation

mode is

Interpolated

Example:

To see values corresponding to an array of time stamps for the

sinusoidu tag, the following arguments are set for the Timed Data

function:

Tagname = sinusoidu

Timestamps = <cell reference to existing array of compressed

data for sinusoid tag>

Retrieval Mode = interpolated

The resulting function array appears as:

1 2 ... 45 46 47 48 49 50 51 52 53 54 55 ... 163 164

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Rockwell-automation FactoryTalk Historian SE DataLink 4.2 User Guide Uživatelský manuál Strana 50