14 Rockwell Automation Publication IASIMP-QS005H-EN-P - April 2016
Chapter 1 Risk Assessment and System Design
Follow These Steps
Safety Strategy Fundamentals
To devise a proper safety strategy, these steps must be addressed.
1. Risk Assessment: based on a clear understanding of the machine limits and functions and the tasks that may be
required to be performed throughout its life.
2. Risk Reduction: performed if necessary with safety measures selected and implemented based on the
performance requirements dictated by the risk assessment methodology.
Risk Assessment Methodologies dictate that the hierarchy of safety controls be followed, implementing system
redesign measures, if possible, to totally eliminate the risk.
A hazard control technique must be defined for each hazardous motion, including each mode of operation (such
as Automatic, Jog, or Cycle Stop) and each demand on the safety system (such as E-stop device activated or safety
gate opened). This is essential so that the energy source is properly controlled in all interactions with the machine
and all demand scenarios on the safety system.
Start
Safety Strategy Fundamentals
, page 14
Conducting a Team-based Risk Assessment,
page 16
Select Mitigation Techniques for Hazard
Control, page 22
Incorporate Protective Systems and
Measures, page 22
Safety Specification Example for Robot Cell
Application, page 23
How Rockwell Automation Can Help,
page 25
IMPORTANT The information in this section is not advocated as the definitive method. Individual circumstances may dictate a different
approach. It is intended as a general guideline to encourage a methodical and documented structure.
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