FBD Variables

To connect a new symbol to an existing one (another variable, a block input, or a block output) in the workspace, keep the mouse button depressed (the cursor becomes a "ghost" symbol) and drag the element until its connecting line on the left (or right) overlaps an existing connecting point. When the mouse is released, the new symbol is automatically created and linked.
  1. Drag to place the existing element:
    fbd_var1
  2. Release the mouse button. The variable is automatically connected:
    fbd_var2
Replace existing variables in program organization units (POUs) by double-clicking them to access the Variable Selector or single-clicking them to select from a drop-down combo box containing the global and local variables. Also, single-click a variable, then type a literal value in the text box provided. When inserting literal values that being with a letter or an underscore, enclose these in single quotes as follows: 'abc'.
  1. Select a variable from the drop-down combo-box:
    fbd_var5
  2. Type a literal value in the text box:
    fbd_var6_Trusted
When selecting items like local variables, controller variables, system variables, and defined words from the drop-down combo box, typing characters in the text box focuses on the possible items. Focus on listed items by typing letters, digits, and specific special characters: !, #, $, %, &, \, *, +, -, ,/ <, :, =, >, ?, @, \, ^, _, `, |, and ~.
For input and output variables, choose to display comments entered in the dictionary. From the
View
 menu, access the
Properties
 window and define the
Comment Position
 property.
fbd_var3.giffbd_var4
Resize variables that display in the workspace.
To insert a variable
  1. From the
    Toolbox
    , drag the variable element into the language container. The
    Variable Selector
     displays.
  2. In the
    Variable Selector
    , select the required variable, then click
    OK
    .
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