RSView Supervisory Edition Installation Guide

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• • • • •RSVIEW SUPERVISORY EDITION USER’S GUIDESetting up derived tagsThese are the tasks involved in setting up derived tags for an application:1. Create the derived tags in the Derived Tags editor in <strong>RSView</strong> Studio .2. Set the maximum update rate in the Derived Tag Setup dialog box.3. Save the derived tags component and give it a name.Using the Derived Tags editorTo open the Derived Tags editor1. In <strong>RSView</strong> Studio, in the Explorer window, open the Logic and Control folder.2. Right-click the Derived Tags editor and then click New, or drag the Derived Tagseditor’s icon from the Explorer to the workspace.10-2
10 • CREATING DERIVED TAGS• • • • •Using the Check Syntax buttonAfter you create an expression for a derived tag, use the Check Syntax button to verifythat the syntax is correct. You can check the syntax of an expression at any time while theDerived Tags editor is open.If the syntax is invalid, an error appears next to the Check Syntax button.The syntax of the expression is also checked automatically when you click the Accept orDiscard buttons.10 • PlaceholderUsing the Accept and Discard buttonsWhen you enter information in the editor, the Prev and Next buttons change to Accept andDiscard. Click Accept to save information. Click Discard to discard information that youjust entered.Creating a derived tags componentYou can use any tag to store the result of a derived tag calculation. The tag must alreadyexist, for example, as an HMI tag (i.e., memory or device) or in a data server, before youcan use it as a derived tag.Do not create derived tags that depend on the results of other derived tags.Derived tag processing is not sequential. This means the results of an expression that includesother derived tags might not occur in the desired scan or order of evaluation. To avoid this, it isbest to put all the required logic in the expression.To create a derived tags component1. In the Derived Tags editor, specify the tag that will hold the derived value and type adescription of the tag.2. In the Expression box, create an expression that will determine the derived tag’s value.For information about expressions, see Chapter 20, Creating expressions.3. Click Accept.4. Click Next to create another derived tag if the derived tags component is to containmore than one derived tag.5. Repeat steps 1 through 4 until all derived tags for the particular component aredefined.6. Select Derived Tag Setup from the Setup menu.10-3
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User’s GuideVolume 1Publication V
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ContentsPrefaceAbout the documentat
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CONTENTS• • • • •Plan how
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• • • • •RSVIEW SUPERVISO
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1Getting startedThis chapter descri
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1 • GETTING STARTED• • •
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2Exploring RSView StudioThis chapte
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2 • EXPLORING RSVIEW STUDIO•
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4Setting up FactoryTalk DirectoryTh
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4 • SETTING UP FACTORYTALK DIRECT
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5Working with distributed applicati
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5 • WORKING WITH DISTRIBUTED APPL
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Page 111 and 112: 7Setting up communicationsThis chap
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14Using eventsThis chapter describe
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14 • USING EVENTS• • • •
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INDEX• • • • •IndexSymbol
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INDEX• • • • •Object Smar
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INDEX• • • • •redundancyS
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INDEX• • • • •Embedded va
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INDEX• • • • •caching •
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INDEX• • • • •stopping au
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INDEX• • • • •MMacros •
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INDEX• • • • •QQuestion m
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INDEX• • • • •to RSView c
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INDEX• • • • •Tags • 8-
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INDEX• • • • •Procedures
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RSView Supervisory Edition Installation Guide

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