Change the properties of a variable

Change the properties of an existing variable to accommodate the requirements of program organization units (POUs), I/O wiring, and
Modbus®
communication. For example, change the
Direction
property for I/O wiring.
TIP: Update each instance of a function or function block after adding, removing, renaming, changing data type, or changing direction of parameters in all POUs using the instance. Identify these POUs with the
Cross Reference Browser
, then open each POU and reselect the modified instance using the
Block Selector
.
To change the properties of a variable
  1. From the
    Application View
    , double-click the Dictionary instance for the device or POU.
  2. In the
    Variables Grid
    , change the properties for the variable:
    • Name
    • Data Type
    • String Size
    • Attribute
    • Direction
    • Modbus Address
    • Message True
    • Message False
    • Retained
    • Initial Value
    • Unit
    • Comment
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