Safety Considerations Guide for Trident v2 Systems - TUV ...

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iv Contents SIL Capability 3 Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Periodic Offline Test Interval Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Project Change and Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Maintenance Overrides. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Safety Controller Boundary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Chapter 3 Fault Management 33 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 System Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Types of Faults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 External Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Internal Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Operating Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Module Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Analog Input (AI) Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Analog Input/Digital Input (AI/DI) Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Analog Output (AO) Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Digital Input (DI) Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Digital Output (DO) Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Pulse Input (PI) Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Solid-State Relay Output (SRO) Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Calculation for Diagnostic Fault Reporting Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Input/Output Processing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Main Processor and TriBus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 External Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Chapter 4 Application Development 45 Development Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 Triconex Product Alert Notices (PANs). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 Safety and Control Attributes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 VAR_IN_OUT Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 Array Index Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Infinite Loops . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Important TriStation 1131 Software Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Download Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Verify Last Download to the Controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Compare to Last Download. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 Setting Scan Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 Scan Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 Scan Surplus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 Sample Safety-Shutdown Programs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 When All I/O Modules Are Safety-Critical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 When Some I/O Modules Are Safety-Critical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 Defining Function Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 Safety Considerations Guide for Trident v2 Systems
Contents v Partitioned Processes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 Alarm Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Programming Permitted Alarm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Remote Access Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Response Time Alarm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Disabled Points Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Appendix A Triconex Peer-to-Peer Communication 63 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 Data Transfer Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 Estimating Memory for Peer-to-Peer Data Transfer Time. . . . . . . . . . . . . . . . . . . . . . 65 Estimating the Data Transfer Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 Examples of Peer-to-Peer Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 Example 1: Fast Send to One Triconex Node . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 Example 2: Sending Data Every Second to One Node. . . . . . . . . . . . . . . . . . . . . . . . . 68 Example 3: Controlled Use of SEND/RECEIVE Function Blocks . . . . . . . . . . . . . . . 68 Example 4: Using SEND/RECEIVE Function Blocks for Safety-Critical Data. . . . . 69 Appendix B HART Communication 71 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 HART Position Paper from TÜV Rheinland . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 Appendix C Safety-Critical Function Blocks 81 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 SYS_CRITICAL_IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 SYS_SHUTDOWN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 SYS_VOTE_MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 Index 97 Safety Considerations Guide for Trident v2 Systems
Page 1 and 2: Trident v2 Systems Safety Considera
Page 3: Contents Preface vii Summary of Sec
Page 7 and 8: Preface This guide provides informa
Page 9 and 10: • All other requests are handled
Page 11 and 12: 1 Safety Concepts Overview 2 Hazard
Page 13 and 14: Protection Layers Methods that prov
Page 15 and 16: Hazard and Risk Analysis Hazard and
Page 17 and 18: Sample SIL Calculation Hazard and R
Page 19 and 20: Safety Life Cycle Model Hazard and
Page 21 and 22: Hazard and Risk Analysis 11 • Eac
Page 23 and 24: CAN/CSA-C22.2 No. 61010-1-04 Safety
Page 25 and 26: 2 Application Guidelines Overview 1
Page 27 and 28: General Guidelines This section des
Page 29 and 30: General Guidelines 19 Safety Measur
Page 31 and 32: Emergency Shutdown Systems The safe
Page 33 and 34: Safety-Shutdown Guidelines for Tric
Page 35 and 36: Guidelines for Triconex Controllers
Page 43 and 44: 3 Fault Management Overview 34 Syst
Page 45 and 46: System Diagnostics System Diagnosti
Page 47 and 48: Operating Modes Each input or outpu
Page 49 and 50: Analog Output (AO) Modules Module D
Page 51 and 52: Calculation for Diagnostic Fault Re
Page 53 and 54: External Communication Module Diagn
Page 55 and 56:
4 Application Development Developme
Page 57 and 58:
Array Index Errors Infinite Loops D
Page 59 and 60:
Setting Scan Time 49 application. T
Page 61 and 62:
Sample Safety-Shutdown Programs Sam
Page 63 and 64:
Sample Safety-Shutdown Programs 53
Page 65 and 66:
When Some I/O Modules Are Safety-Cr
Page 67 and 68:
Sample Safety-Shutdown Programs 57
Page 69 and 70:
Partitioned Processes Sample Safety
Page 71 and 72:
Alarm Usage Alarm Usage 61 To imple
Page 73 and 74:
A Triconex Peer-to-Peer Communicati
Page 75 and 76:
Data Transfer Time Data Transfer Ti
Page 77 and 78:
Data Transfer Time 67 A typical dat
Page 79 and 80:
Examples of Peer-to-Peer Applicatio
Page 81 and 82:
B HART Communication Overview 72 HA
Page 83 and 84:
2008-04-01 Automation, Software and
Page 85 and 86:
2008-04-01 HART Position Paper from
Page 87 and 88:
2008-04-01 A possible impact to the
Page 89 and 90:
2008-04-01 HART Position Paper from
Page 91 and 92:
C Safety-Critical Function Blocks O
Page 93 and 94:
SYS_CRITICAL_IO Accumulates the sta
Page 95 and 96:
Library Trident and Tri-GP (TRDLIB)
Page 97 and 98:
END_IF ; PREVIOUS_RESET := RESET ;
Page 99 and 100:
Output Parameters (continued) Name
Page 101 and 102:
SYS_SHUTDOWN 91 * the safety system
Page 103 and 104:
ALARM_DISABLED_POINTS := MPX.POINTS
Page 105 and 106:
Example For shutdown examples, see
Page 107 and 108:
A abbreviations, list of viii actua
Page 109 and 110:
message errors, external communicat
Page 112:
Invensys Operations Management 5601
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