Safety Considerations Guide for Triconex General ... - ICEWeb

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12 Chapter 1 Safety Concepts Safety Standards Over the past several years, there has been rapid movement in many countries to develop standards and regulations to minimize the impact of industrial accidents on citizens. The standards described in this section apply to typical applications. General Safety Standards IEC 61508, Parts 1–7 The IEC 61508 standard, “Functional Safety: Safety Related Systems,” is an international standard designed to address a complete SIS for the process, transit, and medical industries. The standard introduces the concept of a safety life cycle model (see Figure 5 on page 9) to illustrate that the integrity of an SIS is not limited to device integrity, but is also a function of design, operation, testing, and maintenance. The standard includes four SILs that are indexed to a specific probability-to-fail-on-demand (PFD) (see Figure 2 on page 5). A SIL assignment is based on the required risk reduction as determined by a PHA. ANSI/ISA S84.01 ANSI/ISA S84.01-1996 is the United States standard for safety systems in the process industry. The SIL classes from IEC 61508 are used and the DIN V 19250 relationships are maintained. ANSI/ISA S84.01-1996 does not include the highest SIL class, SIL 4. The S84 Committee determined that SIL 4 is applicable for medical and transit systems in which the only layer of protection is the safety-instrumented layer. In contrast, the process industry can integrate many layers of protection in the process design. The overall risk reduction from these layers of protection is equal to or greater than that of other industries. IEC 61511, Parts 1–3 The IEC 61511 standard, “Functional Safety: Safety Instrumented Systems for the Process Industry Sector,” is an international standard designed to be used as a companion to IEC 61508. IEC 61511 is intended for SIS designers, integrators, and users in the process-control industry. Application-Specific Standards NFPA 85 NFPA 85, “Boiler and Combustion Systems Hazards Code,” outlines the United States requirements for operations using single burner boilers and multiple burner boilers. Safety Considerations Guide for Triconex General Purpose v2 Systems
Safety Standards 13 CAN/CSA-C22.2 No. 61010-1-04 CAN/CSA-C22.2 No. 61010-1-04, “Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use, Part 1: General Requirements,” outlines the Canadian requirements for burner management applications. Safety Considerations Guide for Triconex General Purpose v2 Systems
Page 1 and 2: Triconex General Purpose v2 Systems
Page 3 and 4: Contents Preface vii Summary of Sec
Page 5 and 6: Contents v Partitioned Processes. .
Page 7 and 8: Preface This guide provides informa
Page 9 and 10: Preface ix • All other requests a
Page 11 and 12: 1 Safety Concepts Overview 2 Hazard
Page 13 and 14: Overview 3 Protection Layers Method
Page 15 and 16: Hazard and Risk Analysis 5 Hazard a
Page 17 and 18: Hazard and Risk Analysis 7 Sample S
Page 19 and 20: Hazard and Risk Analysis 9 Safety L
Page 21: Hazard and Risk Analysis 11 • Eac
Page 25 and 26: 2 Application Guidelines Overview 1
Page 27 and 28: General Guidelines 17 General Guide
Page 29 and 30: Guidelines for Triconex Controllers
Page 41 and 42: 3 Fault Management Overview 32 Syst
Page 43 and 44: System Diagnostics 33 System Diagno
Page 45 and 46: Operating Modes 35 Operating Modes
Page 47 and 48: 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 83 and 84:
Page 85 and 86:
Page 87 and 88:
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 and 100:
SYS_SHUTDOWN 89 * the safety system
Page 101 and 102:
SYS_SHUTDOWN 91 ALARM_DISABLED_POIN
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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