Encapsulation

Add-On Instructions are designed to fully encapsulate the code and data associated with the instruction. The logic inside an Add-On Instruction uses only the parameters and local tags defined by the instruction definition. There is no direct programmatic access to controller or program scope tags. This lets the Add-On Instruction be a standalone component that can execute in any application that calls it by using the parameters interface. It can be validated once and then locked to prevent edits.