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RSView Supervisory Edition Installation Guide

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eferred to it using an absolute reference. However, the tag called Temp<br />

will now refer to /AssemblyLineSouth::Temp because you referred to<br />

the Temp tag using a relative reference.<br />

If the Temp tag does not exist in the AssemblyLineSouth area, an error<br />

appears in the FactoryTalk Diagnostics List.<br />

Use absolute references when you want to ensure that a specific<br />

component is used, regardless of where it is referenced from.<br />

Relative references can be used, for example, in an application for a<br />

plant that has identical production lines. The application could have<br />

multiple areas, each representing one of the production lines, with the<br />

same component names in each area. For details about areas, see<br />

page 5-3.<br />

Syntax<br />

Precede area names with a forward slash (/). Also separate area names<br />

from other area names, with a forward slash.<br />

Separate area names from component names with two colons (::).<br />

Example: Using the Display command with absolute and relative<br />

references in distributed applications<br />

Assume that a graphic display called Overview appears if the operator<br />

presses a button on a graphic display.<br />

To show the graphic display called Overview, use the Display<br />

command in the button’s press action, as follows:<br />

• To create an absolute reference to the display called Overview in the<br />

area called Baking, type Display /Baking::Overview.<br />

• To create an absolute reference to the display called Overview in the<br />

area called Packaging, type Display /Packaging::Overview.<br />

Working with distributed applications 5–5

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