Rockwell Automation Publication 1756-UM001M-EN-P - February 2012 167
Develop Applications Chapter 10
Add-On Instructions
With version 16, or later, of RSLogix 5000 software, you can design and
configure sets of commonly used instructions to increase project consistency.
Similar to the built-in instructions contained in Logix5000 controllers, these
instructions you create are called Add-On Instructions. Add-On Instructions
reuse common control algorithms. With them, you can do the following:
• Ease maintenance by animating logic for a single instance.
• Protect intellectual property with locking instructions.
• Reduce documentation development time.
You can use Add-On Instructions across multiple projects. You can define your
instructions, obtain them from somebody else, or copy them from another
project.
This table explains some of the capabilities and advantages of use Add-On
Instructions.
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.
Table 43 - Add-On Instruction Capabilities
Capability Description
Save 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 because
commonly used algorithms all work in the same manner, regardless of who implements the project.
Use Standard Editors You create Add-On Instructions by using one of three RSLogix 5000 software programming editors.
• Relay Ladder
• Function Block Diagram
• Structured Text
Once you have created instructions, you can use them in any RSLogix 5000 editor.
Export 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.
Use 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.
Create Custom Help When you create an instruction, you enter information for the description fields in software dialogs, information that becomes what is
known as Custom Help. Custom Help makes it easier for you to get the help you need when implementing the instructions.
Apply 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.
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