Safety Considerations Guide, Tricon v9.0 - Tuv-fs.com

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8 Hazard and Risk AnalysisExample SIL CalculationAs a PES, the controller is designed to minimize its contribution to the SIL, therebyallowing greater flexibility in the SIS design.Comparison ofPercent Availabilityand PFDRiskReductIon99.9999 0.00000199.999 0.0000199.99 0.000199.00 0.0190.00 0.1PercentAvailabilityRisk MeasuresPFDTricon PES*99.90 0.001 SIL 3 SIS* Tricon controller failure rates have been independently calculated by FactoryMutual System. A copy of Factory Mutual Technical Report, “An Estimation of theFailure Rates for Modules Used in the Triconex Tricon 9 System,” FMRC J.I.003003840, is available upon request.Safety Integrated SystemSimplified Diagramof Key Elements3 PressureTransmitters (2oo3)SensorsTMR Controller(2oo3)PES/Logic Solver2 Block Valvesin Series (1oo2)Final Elements3 TemperatureTransmitters (2oo3)Tricon Safety Considerations Guide
Hazard and Risk Analysis 9Equation for Calculating PFD avg for SensorsThe following simplified equation may be used to calculate PFD avg for sensors(2oo3):PFD avg = (λ DU *TI) 2where the following variables are supplied by the manufacturer:λ = failure rateDU = dangerous, undetected failure rateTI = test interval in hoursEquation for Calculating PFD avg for Block ValvesThe following simplified equation may be used to calculate PFD avg for blockvalves (1oo2) in series (final elements):PFD avg = 1/3(λ DU *TI) 2where the following variables are supplied by the manufacturer:λ = failure rateDU = dangerous, undetected failure rateTI = test interval in hoursEquation for Calculating PFD avg for SystemThe following simplified equation may be used to calculate PFD avg for a system.System PFD avg = Sensors PFD avg + Block Valves PFD avg + Controller PFD avgChapter 1Safety Concepts
Page 1 and 2: TriconVersion 9Safety Consideration
Page 3: AcknowledgementTriconex acknowledge
Page 6 and 7: viRelated DocumentsRelated Document
Page 8 and 9: viiiHow to Contact TriconexHow to C
Page 10: xTrainingFor Turbomachinery Systems
Page 13 and 14: xiCONTENTSAbout This Guide ........
Page 15 and 16: xiiiAnalog Input Module Alarms ....
Page 17 and 18: CHAPTER 1Safety ConceptsThis chapte
Page 19 and 20: Safety Overview 3Protection LayersT
Page 21 and 22: Hazard and Risk Analysis 5Hazard an
Page 23: Hazard and Risk Analysis 7Completio
Page 27 and 28: Hazard and Risk Analysis 11Flowchar
Page 29 and 30: Hazard and Risk Analysis 13Some key
Page 31 and 32: Safety Standards 15Safety Standards
Page 33 and 34: Safety Standards 17Application-Spec
Page 35 and 36: CHAPTER 2Application GuidelinesThis
Page 37 and 38: General Guidelines 21• Under cert
Page 39 and 40: Guidelines for Tricon Controllers 2
Page 53 and 54: CHAPTER 3Fault ManagementThis chapt
Page 55 and 56: System Diagnostics 39System Diagnos
Page 57 and 58: Operating Modes 41Operating ModesEa
Page 59 and 60: Module Diagnostics 43Module Diagnos
Page 61 and 62: Module Diagnostics 45Relay Output M
Page 63 and 64: Module Diagnostics 47System Attribu
Page 65 and 66: CHAPTER 4Application DevelopmentThi
Page 67 and 68: Important TriStation Commands 51Imp
Page 69 and 70: Setting Scan Time 53Setting Scan Ti
Page 71 and 72: Sample Safety-Shutdown Programs 55S
Page 73 and 74: Sample Safety-Shutdown Programs 57I
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Sample Safety-Shutdown Programs 59A
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Sample Safety-Shutdown Programs 61P
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Sample Safety-Shutdown Programs 63O
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Sample Safety-Shutdown Programs 65D
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Sample Safety-Shutdown Programs 67P
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APPENDIX APeer-to-Peer Communicatio
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Data Transfer Time 71ParameterTS =S
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Examples of Peer-to-Peer Applicatio
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TR_CRITICAL_IO Function Block 75TR_
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TR_CRITICAL_IO Function Block 77Par
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TR_CRITICAL_IO Function Block 79Str
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TR_CRITICAL_IO Function Block 81CO
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TR_SHUTDOWN Function Block 83Parame
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TR_SHUTDOWN Function Block 85Relate
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TR_SHUTDOWN Function Block 87* Exam
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TR_SHUTDOWN Function Block 89TIMER_
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TR_VOTE_MODE Function Block 91Param
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TR_VOTE_MODE Function Block 93Appen
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APPENDIX BShutdown Function BlocksT
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TR_CRITICAL_IO Function Block 974 R
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TR_CRITICAL_IO Function Block 99Rel
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TR_CRITICAL_IO Function Block 101*
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TR_SHUTDOWN Function Block 103TR_SH
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TR_SHUTDOWN Function Block 105Param
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TR_SHUTDOWN Function Block 107Struc
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TR_SHUTDOWN Function Block 109IF CI
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TR_VOTE_MODE Function Block 111TR_V
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TR_VOTE_MODE Function Block 113Stru
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Index 115IndexAactual scan time 53a
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Index 117Modbus master functions 25
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Index 119timescan 53TMR architectur
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