Functional Safety 2016

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Institute of Measurement and Control Functional Safety Conference 2016
Challenges in Achieving Safety Instrumented Function Response Time for a Fast-Acting Process Page 14
Nomenclature
AP Application Program
FAT Factory Acceptance Test
GWR Guided Wave Radar
HAZOP Hazard and Operability Study
HFT Hardware Fault Tolerance
IEC International Electrotechnical Commission
IPL Independent Protection Layer
ISA International Society of Automation
LOPA Layer of Protection Analysis
PFD Probability of Failure on Demand
RTD Resistance Temperature Detector
SC Systematic Capability
SIF Safety Instrumented Function
SIL Safety Integrity Level
SIS Safety Instrumented System
SRS Safety Requirements Specification
Acknowledgements
Special thanks to Mirek Generowicz, Robert Thorp, Keivan Sabbaghi Valashani, Niran Ramkissoon and
Justin Rahamut for their support and for providing feedback during the development of this paper.
References
Barnard, Geoffrey. and Creel, William. 2015. Impacts of Process Safety Time on Layer of Protection
Analysis, April 2015,
content/uploads/2015/11/impacts_of_process_safety_time_on_layer_of_protection_analysis.pdf
(accessed 21 March 2016).
IEC 61508, Functional safety of electrical/electronic/programmable electronic safety-related systems.
1998. Geneva, Switzerland: IEC.
IEC 61508, Functional safety of electrical/electronic/programmable electronic safety-related systems.
2010. Geneva, Switzerland: IEC.
IEC 61511-1, Functional safety – Safety instrumented systems for the process industry sector – Part 1:
Framework, definitions, system, hardware and software requirements, Edition 2.0. 2016. Geneva,
Switzerland: IEC.
IEC 61511-2, Functional safety – Safety instrumented systems for the process industry sector – Part 2:
Guidelines for the application of IEC 61511-1:2016 , Edition 2.0. 2016. Geneva, Switzerland: IEC.