Add-On Instructions

Add-On Instructions are instructions that you define. You can then add the instructions to your project. You can define these instructions or they can be provided to you by someone else. Once defined in a project, they behave similarly to the built-in instructions already in the Logix controllers. An Add-On Instruction lets you encapsulate your most commonly used logic as sets of instructions.

Like standard Add-On Instructions, safety Add-On Instructions let you encapsulate commonly-used safety logic into a single instruction, making it modular and easier to reuse. In addition to the instruction signature used for high-integrity Add-On Instructions, safety Add-On Instructions feature a safety instruction signature ID for use in safety-related functions.