Rockwell Automation Publication 1756-RM093J-EN-P - April 2018
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Safety Add-On Instructions
Appendix B
Create Add-On Instruction Test Project
You need to create a unique test project, specifically for creating and testing the
safety Add-On Instruction. This must be a separate and dedicated project to
minimize any unexpected influences.
Follow the guidelines for projects described in
Create a Safety Add-On Instruction
For guidance in creating Add-On Instructions, refer to the Logix5000
Controllers Add-On Instruction Programming Manual, publication
Generate Instruction Signature
The instruction signature lets you quickly determine if the instruction has been
modified. Each Add-On Instruction has the ability to have its own signature. The
instruction signature is required when an Add-On Instruction is used in safety-
related functions, and may be required for regulated industries. Use it when your
application calls for a higher level of integrity.
The instruction signature consists of an ID number and timestamp that identifies
the contents of the Add-On Instruction at a given point in time.
Once generated, the instruction signature seals the Add-On Instruction,
preventing it from being edited while the signature is in place. This includes rung
comments, tag descriptions, and any instruction documentation that was created.
When the instruction is sealed, you can perform only these actions:
•
Copy the instruction signature
•
Create or copy a signature history entry
•
Create instances of the Add-On Instruction
•
Download the instruction
•
Remove the instruction signature
•
Print reports
When an instruction signature has been generated, RSLogix 5000 software
displays the instruction definition with the seal icon.
IMPORTANT
If you plan to protect your Add-On Instruction by using the source
protection feature in RSLogix 5000 software, you must enable source
protection prior to generating the instruction signature.
