OPC 10000-15: OPC Unified Architecture

Part 15: Safety

Release 1.04
2019-10-31

Copyright (c) 2020 OPC Foundation
Generated on 7/17/2020 2:06:54 AM.

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This document is a copy of the original which can be found here.

Table of Contents

1 Scope

2 General
    2.1 Reference Documents
    2.2 Relation to safety-, security- and OPC UA-standards

3 Terms, definitions and conventions
    3.1 Overview
    3.2 Terms
    3.3 Abbreviations and symbols
    3.4 Conventions
        3.4.1 Conventions in this part
        3.4.2 Conventions on CRC calculation
        3.4.3 Conventions in state machines

4 Introduction to OPC UA Safety
    4.1 What is OPC UA Safety?
    4.2 Safety functional requirements
    4.3 Communication structure
    4.4 Implementation aspects
    4.5 Features of OPC UA Safety
    4.6 Security policy
    4.7 Safety measures

5 Use cases (informative)
    5.1 Use cases for different types of communication links
        5.1.1 Unidirectional communication
        5.1.2 Bidirectional communication
        5.1.3 Safety Multicast
    5.2 Cyclic and acyclic safety communication
    5.3 Principle for “Application variables with qualifier”

6 Information Model
    6.1 ObjectType Definition
        6.1.1 Method ReadSafetyData
        6.1.2 Method ReadSafetyDiagnostics
    6.2 Datatype Definition
    6.3 SafetyProvider Version
    6.4 DataTypes and length of user data
    6.5 Connection establishment

7 Safety communication layer services and management
    7.1 Overview
    7.2 OPC UA Platform interface (OPC UA PI)
    7.3 SafetyProvider interfaces
        7.3.1 SAPI of SafetyProvider
        7.3.2 SPI of SafetyProvider
        7.3.3 Characteristics of SafetyProvider
    7.4 SafetyConsumer interfaces
        7.4.1 SAPI of SafetyConsumer
        7.4.2 Motivation for SAPI Operator Acknowledge (OperatorAckConsumer)
        7.4.3 SPI of the SafetyConsumer
        7.4.4 Motivation for SPI SafetyOperatorAckNecessary

8 Safety communication layer protocol
    8.1 SafetyProvider and SafetyConsumer
        8.1.1 SPDU formats
            8.1.1.1 RequestSPDU: SafetyConsumerID
            8.1.1.2 RequestSPDU: MonitoringNumber
            8.1.1.3 RequestSPDU: Flags
            8.1.1.4 ResponseSPDU: SafetyData
            8.1.1.5 ResponseSPDU: Flags
            8.1.1.6 ResponseSPDU: SPDU_ID
            8.1.1.7 ResponseSPDU: SafetyConsumerID
            8.1.1.8 ResponseSPDU: MonitoringNumber
            8.1.1.9 ResponseSPDU: CRC
            8.1.1.10 ResponseSPDU: NonSafetyData
        8.1.2 OPC UA Safety behavior
            8.1.2.1 General
            8.1.2.2 SafetyProvider/-Consumer Sequence diagram
            8.1.2.3 SafetyProvider state diagram
            8.1.2.4 SafetyConsumer state diagram
            8.1.2.5 SafetyConsumer sequence diagram for OA (informative)
        8.1.3 Subroutines
            8.1.3.1 Build ResponseSPDU
            8.1.3.2 Calculation of the SPDU_ID_1, SPDU_ID_2, SPDU_ID_3
            8.1.3.3 Coding of the SafetyProviderLevel_ID
            8.1.3.4 Signature over the Safety Data (SafetyStructureSignature)
            8.1.3.5 Calculation of a CRC checksum

9 Diagnostics
    9.1 Diagnostics messages
    9.2 Method ReadSafetyDiagnostics

10 Safety communication layer management
    10.1 SPDU parameter assignment
    10.2 Safety function response time part of communication

11 System requirements
    11.1 Constraints on the SPDU-Parameters
        11.1.1 SafetyBaseID and SafetyProviderID
        11.1.2 SafetyConsumerID
    11.2 Initialization of the MNR
    11.3 Constraints on the calculation of system characteristics
        11.3.1 Probabilistic considerations (informative)
        11.3.2 Safety related assumptions (informative)
    11.4 PFH/PFD-values of a logical OPC UA Safety communication link
    11.5 Safety manual
    11.6 Indicators and displays

12 Assessment
    12.1 Safety policy
    12.2 Obligations
    12.3 Automated layer test for OPC UA Safety (informative)
        12.3.1 Testing principle
        12.3.2 Test configuration

13 Profiles and Namespaces
    13.1 Namespace Metadata
    13.2 Handling of OPC UA Namespaces

Annex A : Safety Namespace and mappings (normative)
    A.1 Namespace and identifiers for Safety Information Model

Annex B : Additional information (informative)
    B.1 CRC-calculation using tables, for the polynomial 0xF4ACFB13
    B.2 Use cases for Operator Acknowledgment
        B.2.1 Explanation
        B.2.2 Use case 1: unidirectional comm. and OA on the SafetyConsumer side
        B.2.3 Use case 2: bidirectional comm. and dual OA
        B.2.4 Use case 3: bidirectional comm. and single, one-sided OA
        B.2.5 Use case 4: bidirectional comm. and single, two-sided OA

Annex C : Bibliography