Serge NOEL
67 lines
2.8 KiB
Plaintext
67 lines
2.8 KiB
Plaintext
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<meta name="generator" content="HTML Tidy for HTML5 for Apple macOS version 5.8.0">
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<title>LogixNG Reference - Chapter 12</title>
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<meta name="author" content="Daniel Bergqvist">
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<meta name="author" content="Dave Sand">
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<meta name="keywords" content="jmri LogixNG reference tables">
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<h1>LogixNG Reference - Chapter 12</h1>
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<h2>LogixNG Global Variables</h2>
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<p>A LogixNG Global Variable is similar to the standard memory variable in that it is
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accessable from any LogixNG conditional or module. With the exception of an initial value,
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its content is not retained between PanelPro sessions even if the data file is stored.</p>
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<p><strong>Global</strong> variables support all of the data types that <strong>local
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</strong> variables support, including the complex types such as map and array. It can be
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used anywhere a local variable can be used. Either a local variable name or a global variable
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name is used. When a name is supplied, a check is made to see if it matches a local variable.
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If it does, the local variable is used. If it does not, a check is made to see if it matches
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a global variable. If it does, the global variable is used. If a match is not found, the
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<em>"The symbol ... does not exist in the symbol table"</em> error will be displayed. Notice
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the sequences of checks. If the same name is used for both a local and a global variable, the
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local variable will be selected.</p>
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<pre style="border: 2px solid #778899; margin: 1em; padding: 0.1em;">
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LogixNG: Set Scale
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ConditionalNG: IQC:AUTO:0004
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! A
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Set variable Scale to "HO"
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</pre>
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<p>In the above example, the name <strong><em>Scale</em></strong> could be either a local or
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global variable. In this case, it is a global variable since there are no local variables
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defined in the conditional.</p>
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<p>Global variables are created using <strong>Tools ⇒ Tables ⇒ LogixNG ⇒
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LogixNG Global Variables</strong>. See
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<a href="../../../../package/jmri/jmrit/beantable/LogixNGGlobalVariables.shtml">
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LogixNG Global Variables table</a> for details.</p>
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<p>For details on Local Variables see <a href="chapter8.shtml">Chapter 8 - Local Variables</a></p>
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<hr>
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<p><a href="chapter13.shtml">Chapter 13 - Jython Scripting Support</a>
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</p>
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<p><a href="index.shtml">Return to the Reference TOC</a>
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