Create an EnableInFalse routine

Create and enable an EnableInFalse routine for the definition of an Add-On Instruction to have the EnableInFalse routine execute when the rung condition is false (0) or the EnableIn parameter of the Add-On Instruction is false. An EnableInFalse routine is used as scan false logic when the EnableInFalse routine is output instruction in a Ladder routine. For example, use scan false to place OTEs in the de-energized state when the preceding rung conditions are false. Use EnableInFalse in an Add-On Instruction to define the behavior of false conditions.
When an Add-On Instruction executes in the false condition and the Add-On Instruction has an EnableInFalse routine defined and enabled, data of any required parameters passes. Values pass to the Input parameters and out of Output parameters from their arguments in the instruction call.
If the EnableInFalse routine is disabled for an Add-On Instruction that is in the false condition, values pass to any required Input parameters in ladder logic.
To create an EnableInFalse routine
  1. On the explorer
    bar, select Library icon
    Library
    .
  2. In
    Library
    , double-click the Add-On Instruction.
  3. In the definition of the Add-On Instruction under
    EnableFalse
    , select
    Create EnableInFalse routine
    .
    TIP: If an EnableInFalse routine exists for the Add-On Instruction, select
    Delete EnableInFalse routine
     to delete the routine before creating a routine.
  4. In
    Create EnableInFalse
     complete:
    • Description
      . Enter a description of what the routine performs in the logic.
    • Routine Type
      . The Ladder Diagram type is read-only.
  5. Select
    Create
    . In
    Library
    ,
    EnableInFalse
    appears under the Add-On Instruction.
  6. To edit the routine, in
    Library
    , expand the Add-On Instruction and double-click
    EnableInFalse
    .
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