Set up connections for a numeric input object
In the Connections tab you can specify tags or expressions to be used to set the value of the numeric input object's properties that are listed in the Connections table.
You can also set up a valid range of values that can be downloaded to this object, by assigning numbers to the Minimum and Maximum properties. At runtime, values that are downloaded by the operator are validated against the range specified by the Minimum and Maximum properties. If the value is outside the valid range, the numeric input object changes color, an error message is logged to the Diagnostics List, and the download is canceled.
To set up connections for a numeric input object:
- In theGraphicseditor, double-click thenumeric input object.
- In theNumeric Input Propertiesdialog box, in theConnectionstab, for theValueconnection, in theTag/Expressioncolumn, type a tag name or click the browse button(...)to locate and select one.
- ForMaximumandMinimum, you can specify a tag or an expression that will provide a value to the connection.TIP:If only one of Maximum and Minimum is specified, and you try to apply the changes, a warning dialog box is displayed saying that to use range validation for the Value connection, both Minimum and Maximum need to be specified.If Maximum and Minimum are not specified, range validation at runtime for the Value connection is not done.If an older version of the numeric input object is opened, the Value connection is assigned the existing tag name, maximum and minimum are undefined, and range checking is turned off.
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