Ladder Editor

Use the Ladder Editor to edit ladder diagram routines. The Ladder Editor displays a tab for each open routine.
The Ladder Editor displays the elements in the ladder diagram logic routines:
  • rungs
  • branches
  • instructions
  • operands
The online and offline indicators tell you whether a routine is showing the online or offline view. Select an icon to display the online or offline view.
  • Select the online icon to display the online view.
  • Select the offline icon to display the offline view.
In the online view, a green rail appears at the top of the routine and the
Online
 chip at the top right lights up.
When logic is executing, a green rail appears on the left and right sides of the rungs in the routine.
The online chip can also indicate a project mismatch or a disconnected state.
TIP: In the online view, ladder logic is read-only and cannot be edited.
A caret on the Ladder Editor canvas indicates the working position in the routine. The caret only appears when the view is active. When a routine first opens, the caret appears in the rung selection region of the first rung.
TIP: At the top of the Ladder Editor:
  • ?
     indicates where to enter a parameter value for the instruction.
  • ??
     indicates that the system was unable to supply a value for a parameter because the system was unable to attain the value from the Tag Editor.
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