
Rockwell Automation Publication IASIMP-QS005H-EN-P - April 2016
15
Risk Assessment and System Design
Chapter 1
The manner in which risk assessment and risk reduction are performed is the basis of the safety strategy for the machine.
3.
Functional Safety Specification:
performed to identify the required functionality of the total system. The
functional safety specification includes identification of:
• the interconnections between standard control and the safety control system.
• all of the safety devices (input, output, and logic-solving).
• the requirements for integrating devices into the existing system.
• the sequence of events due to various demands on the safety system for each mode of machine operation.
• diagnostic requirement.
• any other items related to the system design.
4. Design, building, and installation of the system.
5.
Final Risk Assessment:
conducted to make sure that no new hazards have been introduced into the system.
6.
Administrative Requirements and Training:
develop and implement administrative requirements, as well as
operator, technician, and affected personnel training.
7.
Validation:
performed prior to production release to verify that the safety system meets the requirements set forth
by the risk assessment and performs at the proper level of fault tolerance prescribed by the chosen methodology.
Identify all machines within the
workplace—Then for each machine
Consult relevant
information and
expertise
MACHINE LIMITS
Can you foresee all possible
operation and use of the machine
HAZARD IDENTIFICATION
Identify each hazard situation—
Then for each hazard
YES
NO
RISK ESTIMATION
Estimate the level of risk due
to the hazard
RISK EVALUATION
Is the level of risk
acceptable
Address the hazard by a
process of re-design or
additional measures
Determine whether the
performance and functional
characteristics of the safety
measure are suitable for the
machine and its type of use
RISK ASSESSMENT
RISK REDUCTION
Have any safety measures
been analyzed and
proven adequate?
END OF
PROCESS
SAFETY STRATEGY
YES
NO
NO
Содержание 1756-L71S
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