Safety Considerations Guide for Triconex General ... - ICEWeb

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90 Appendix C Safety-Critical Function Blocks MAX_TIME_SINGLE < T#0S OR MAX_SCAN_TIME < T#0S THEN ERROR := 1 ; ELSIF IO_ERROR 0 THEN ERROR := 2 ; ELSIF NOT SYSTEM.CO OR NOT MP.CO OR NOT MPX.CO THEN ERROR := 3 ; END_IF ; CO := ERROR = 0 ; IF CO THEN (* Summarize redundancy. *) TMR := NOT IO_CO AND SYSTEM.TMR AND SYSTEM.IO_NO_VOTER_FLTS OR IO_CO AND MP.TMR AND IO_TMR ; GE_DUAL := NOT IO_CO AND SYSTEM.GE_DUAL AND SYSTEM.IO_NO_VOTER_FLTS OR IO_CO AND MP.GE_DUAL AND IO_GE_DUAL ; GE_SINGLE := NOT IO_CO AND SYSTEM.GE_SINGLE OR IO_CO AND IO_GE_SINGLE ; (* Update timers. *) DUAL_TIME( IN := NOT TMR, PT := MAX_TIME_DUAL ) ; SINGLE_TIME( IN := NOT GE_DUAL, PT := MAX_TIME_SINGLE ) ; (* Shutdown if excessive time in degraded operation. *) OPERATING := GE_SINGLE AND NOT DUAL_TIME.Q AND NOT SINGLE_TIME.Q ; (* Output current status. *) DUAL := GE_DUAL AND NOT TMR ; SINGL := GE_SINGLE AND NOT GE_DUAL ; ZERO := NOT GE_SINGLE ; TIMER_RUNNING := OPERATING AND NOT TMR ; (* Output time remaining to shutdown. *) IF NOT OPERATING THEN TIME_LEFT := T#0s ; ELSIF TMR THEN TIME_LEFT := T#999999d ; ELSIF GE_DUAL OR MAX_TIME_DUAL-DUAL_TIME.ET MAX_SCAN_TIME ; Safety Considerations Guide for Triconex General Purpose v2 Systems
SYS_SHUTDOWN 91 ALARM_DISABLED_POINTS := MPX.POINTS_DISABLED > 0 ; ELSE (* Programming error. *) U := ReportBadParam(0) ; OPERATING := FALSE ; TMR := FALSE ; GE_DUAL := FALSE ; GE_SINGLE := FALSE ; DUAL := FALSE ; SINGL := FALSE ; ZERO := FALSE ; TIMER_RUNNING := FALSE ; TIME_LEFT := T#0S; ALARM_PROGRAMMING_PERMITTED := TRUE ; ALARM_REMOTE_ACCESS := TRUE ; ALARM_RESPONSE_TIME := TRUE ; ALARM_DISABLED_POINTS := TRUE ; END_IF ; END_IF ; END_FUNCTION_BLOCK Safety Considerations Guide for Triconex General Purpose v2 Systems
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Triconex General Purpose v2 Systems
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Contents Preface vii Summary of Sec
Page 5 and 6:
Contents v Partitioned Processes. .
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Preface This guide provides informa
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Preface ix • All other requests a
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1 Safety Concepts Overview 2 Hazard
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Overview 3 Protection Layers Method
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Hazard and Risk Analysis 5 Hazard a
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Hazard and Risk Analysis 7 Sample S
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Hazard and Risk Analysis 9 Safety L
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Hazard and Risk Analysis 11 • Eac
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Safety Standards 13 CAN/CSA-C22.2 N
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2 Application Guidelines Overview 1
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General Guidelines 17 General Guide
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Guidelines for Triconex Controllers
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3 Fault Management Overview 32 Syst
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System Diagnostics 33 System Diagno
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Operating Modes 35 Operating Modes
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Module Diagnostics 37 Analog Output
Page 49 and 50: Module Diagnostics 39 Calculation f
Page 51 and 52: Module Diagnostics 41 External Comm
Page 53 and 54: 4 Application Development Developme
Page 55 and 56: Development Guidelines 45 Array Ind
Page 57 and 58: Setting Scan Time 47 application. T
Page 59 and 60: Sample Safety-Shutdown Programs 49
Page 69 and 70: Alarm Usage 59 Alarm Usage To imple
Page 71 and 72: A Triconex Peer-to-Peer Communicati
Page 73 and 74: Data Transfer Time 63 Data Transfer
Page 75 and 76: Data Transfer Time 65 A typical dat
Page 77 and 78: Examples of Peer-to-Peer Applicatio
Page 79 and 80: B HART Communication Overview 70 HA
Page 81 and 82: HART Position Paper from TÜV Rhein
Page 89 and 90: C Safety-Critical Function Blocks O
Page 91 and 92: SYS_CRITICAL_IO 81 SYS_CRITICAL_IO
Page 93 and 94: SYS_CRITICAL_IO 83 Library Trident
Page 95 and 96: SYS_CRITICAL_IO 85 END_IF ; PREVIOU
Page 97 and 98: SYS_SHUTDOWN 87 Output Parameters (
Page 99: SYS_SHUTDOWN 89 * the safety system
Page 103 and 104: SYS_VOTE_MODE 93 Example For shutdo
Page 105 and 106: Index A abbreviations, list of viii
Page 107 and 108: Index 97 N NFPA 85 12 O operating m
Page 110: Invensys Operations Management 5601
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