Edit the logic for the definition of an Add-On Instruction
    Open the logic for the definition of an Add-On Instruction to edit the local tags and logic of the Add-On Instruction. Changes made to the definition of an Add-On Instruction appear in every instance of the Add-On Instruction in the project. 
- Open the logic for either:- Definition of an Add-On Instruction. On the explorerbar, select Library, expand the Add-On Instruction, and then selectLogic. Library, expand the Add-On Instruction, and then selectLogic.
- Instance of an Add-On Instruction:
 - On the explorer bar, select System. System.
- InSystem, expand theFactoryTalk Smart Objectand then program and then double-click the routine.
 
- In the upper-right corner of the tab for the routine, select the drop-down and then select the definition of the Add-On Instruction at the top of the list.
- Edit the logic for the Add-On Instruction.TIP: An Add-On Instruction cannot contain logic that directly or indirectly references itself.
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