Symbols of variables and instances are selected using the variable list, that can be used as the variable editor. Selecting variables is available from all editors:

  • In FBD diagrams, double-click on a variable box, a FB instance name, a contact or a coil to select the associated variable.
  • In LD diagrams, double-click on a contact, a coil or a block input or output to select the variable. Double-click on the top of a FB rectangle to select an instance.
  • In ST/IL texts, run the Insert / Set Variable in the Edit menu to select a variable and insert its name in the text.

When the variable editor is visible in the editor window, you can simply drag a variable from the list to the program to insert it.

When inserting a variable name manually, the Workbench Studio automatically checks if it exists and if not, proposes you to declare it right now.

Hint: Via the Track changes functionality you can make modifications in the program visible. You can activate/deactivate the functionalty via the menu bar entry Tools, Options..., Editing and Track changes. The modified elements or entries will be marked on their left side with the defined color.

Selecting variables and instances

IEC 61131-3 Automation platform > IEC 61131-3 Programming Environment > Editing programs > Selecting variables and instances

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