User manual

Publication 1768-UM001C-EN-P - November 2007
76 Develop Applications
Once defined in a project, Add-On Instructions behave similarly to the built-in
instructions in Logix5000 controllers. They appear on the instruction tool bar
for easy access, as do internal RSLogix 5000 software instructions.
Saving Time
With Add-On Instructions, you can combine your most commonly used logic
into sets of reusable instructions. You save time when you create instructions
for your projects and then share them with others. Add-On Instructions
increase project consistency since commonly used algorithms all work in the
same manner, regardless of who implements the project.
Using Standard Editors
You create Add-On Instructions by using one of three RSLogix 5000 software
programming editors.
• Standard Ladder
• Function Block Diagram
• Structured Text
Once you have created instructions, you can use them in any RSLogix 5000
editor.
Exporting Add-On Instructions
You can export Add-On Instructions to other projects as well as copy and
paste them from one project to another. Give each instruction a unique name
so that you don’t accidentally overwrite another instruction of the same name.
Using Context Views
Context views let you visualize an instruction’s logic for a specific instant,
simplifying online troubleshooting of your Add-On Instructions. Each
instruction contains a revision, a change history, and an auto-generated help
page.
Creating Custom Help
When you create an instruction, you enter information for the description
boxes in software dialogs, information that becomes what is known as Custom
Help. Custom Help makes it easier for users to get the help they need when
implementing the instructions.
Applying Source Protection
As the creator of Add-On Instructions, you can limit users of your instructions
to read-only access, or you can bar access to the internal logic or local
parameters used by the instructions. This source protection lets you prevent
unwanted changes to your instructions and protects your intellectual property.