52 Rockwell Automation Publication 1756-RM012B-EN-P - April 2018
Chapter 6 Safety Application Development
Create the Project
The logic and instructions that are used in programming the application must
be the following:
•Easy to understand
•Easy to trace
•Easy to change
• Easy to test
Review and test all logic. Keep safety-related logic and standard logic separate.
Label the Program
Use these labels to identify the application program clearly:
•Name
•Date
• Revision
• Any other useful identification
Test the Application Program
This step consists of any combination of Run and Program modes, online or
offline edits, upload and download, and informal testing that is required to get
an application running properly in preparation for the Project Validation test.
Generate the Safety Signature
The safety signature applies to the entire safety portion of the controller and
uniquely identifies each project, including its logic, data, and configuration.
The safety signature is composed of an ID (identification number), date, and
time.
ATTENTION: The safety signature is required for the controller to operate at
a SIL 2 or SIL 3 rating. Running without a safety signature is only suitable
during development.
IMPORTANT One of the following editions of the Studio 5000 Logix Designer application
must be present to generate a safety signature: Professional, Full, Lite
Edition or a separate 9324-RLDGLXE GuardLogix Editor.
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