Rockwell Automation Publication 1756-RM093J-EN-P - April 2018 37
Chapter 5
Characteristics of Safety Tags, the Safety Task,
and Safety Programs
Differentiate Between
Standard and Safety
Because it is a Logix-series controller, both standard (non-safety-related) and
safety-related components can be used in the GuardLogix® control system.
You can perform standard automation control from standard tasks within a
GuardLogix project. 1756 GuardLogix controllers provide the same
functionality as other 1756 ControlLogix® series controllers. 1768 Compact
GuardLogix controllers provide the same functionality as other 1768-L4x
CompactLogix™ controllers. What differentiates 1756 and 1768 GuardLogix
controllers from standard controllers is that they provide a SIL 3-capable safety
task.
However, a logical and visible distinction is required between the standard and
safety-related portions of the application. RSLogix 5000® software provides this
differentiation via the safety task, safety programs, safety routines, safety tags, and
safety I/O modules. You can implement both SIL 2 and SIL 3 levels of safety
control with the safety task of the GuardLogix controller.
Topic Page
Differentiate Between Standard and Safety 37
SIL 2 Safety Applications 38
SIL 3 Safety–the Safety Task 41
Use of Human-to-machine Interfaces 44
Safety Programs 46
Safety Routines 46
Safety Tags 47
Additional Resources 49
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