What is binding?

Binding is the process of specifying the value of a property dynamically. Graphic element properties that are bound to data update automatically when the value of the data changes.
Bind a property of a graphic element or instance of an Add-On Graphic to a data item:
  • A tag, including system tags. Browse for tags to bind to after you configure a controller reference on the
    Project Properties
     dialog box.
  • Extended properties of tags.
  • An expression. For example, to bind the property to the value of the expression, you can enter ::controller\program.tag1+::controller\program.tag2.
  • A property of a graphic element or screen. For example, you can bind the Text property of TextDisplay_003 to TextDisplay_001.Text.
  • Each referenced analog tag has eu/min/max.
  • Each BOOLEAN tag references has state identifiers
  • All tags have descriptions
From within the definition of an Add-On Graphic, you can only bind to an external data type property or the property of another graphic element within the definition of an Add-On Graphic.
Properties that you can bind display a
Binding
button Icon: View Designer Binding Icon when you point to them.
IMPORTANT:
  • The HMI device updates data from controllers at a fixed rate of 100, 250, or 500 milliseconds. This update is asynchronous to any scan in a controller.
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