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Scope: Core (OPC-10000-*) All specs

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OPC-10000-15 – OPC Unified Architecture - Part 15: Safety

1 Scope

both developers and assessors of compliant devices and systems. NOTE 3 The resulting SIL claim of a system depends on the implementation of this document within the system - implementation
OPC-10000-15 – OPC Unified Architecture - Part 15: Safety

4.1 General

sufficing to build safety-related applications with a safety integrity level of up to SIL 4. OPC UA Safety itself is an application-independent, general solution. The length and structure
OPC-10000-15 – OPC Unified Architecture - Part 15: Safety

4.2 Implementation aspects

devices designed in accordance with the IEC 61508 series and shall meet the target SIL
OPC-10000-15 – OPC Unified Architecture - Part 15: Safety

5.2 Safety functional requirements

development of this document: Safety communication suitable for safety integrity level up to SIL 4 (see the IEC 61508 series) and PL e (see ISO 13849‑1). Combination of SIL
OPC-10000-15 – OPC Unified Architecture - Part 15: Safety

6.3.3.3 SPI of SafetyProvider

more information on GUID . SafetyProviderLevel Byte 0x01 to 0x04 n.a. R The SIL the SafetyProvider implementation (hardware and software) is capable of, see Figure 9 . NOTE 1 It is independent ... SAPI . NOTE 2 The SafetyProviderLevel is used to distinguish devices of a different SIL . As a result, SPDUs coming from a device with a low SIL will never be accepted
OPC-10000-15 – OPC Unified Architecture - Part 15: Safety

6.3.4.3 Motivation for SAPI Operator Acknowledge (OperatorAckConsumer)

that its failure rate is lower than a given threshold, depending on the desired SIL (see 9.3.1 ). Whenever the SafetyConsumer detects a faulty message, it checks whether the assumption
OPC-10000-15 – OPC Unified Architecture - Part 15: Safety

6.3.4.4 SPI of the SafetyConsumer

active values. SafetyProviderLevel Byte 0x01 to 0x04 0x04 R/W SafetyConsumer 's expectation on the SIL the SafetyProvider implementation (hardware and software) is capable of. See 3.1 , 7.2.3.4 , and Figure
OPC-10000-15 – OPC Unified Architecture - Part 15: Safety

7.2.3.3 Example for the calculation of SPDU_ID_1, SPDU_ID_2 and SPDU_ID_3 (informative)

SafetyStructureSignature has the value 0xDE7329FD and the SafetyProviderLevel_ID is chosen as 0xDEAA9DEE (representing SIL 3). See OPC 10000-6, 5.2.2.6 for details on the encoding of Guids . The octets
OPC-10000-15 – OPC Unified Architecture - Part 15: Safety

7.2.3.4 Coding of the SafetyProviderLevel_ID

Coding of the SafetyProviderLevel_ID The SafetyProviderLevel is the SIL the SafetyProvider implementation (hardware and software) is capable of. Table 37 - Coding for the SafetyProviderLevel_ID SafetyProviderLevel Value of SafetyProviderLevel ... SIL 1 SIL 2 SIL 3 SIL 4 0x11912881 0x647C4654 0xDEAA9DEE 0xAB47F33B [RQ7.17] Exactly one of the values provided in Table 37 shall be used as constant code value
OPC-10000-15 – OPC Unified Architecture - Part 15: Safety

9.3.1 Probabilistic considerations (informative)

safety error interval limit (6, 60, or 600 minutes), depending on the desired SIL of the safety function (see Table 26 and Table 39 ). Thus, for operational safety functions
OPC-10000-15 – OPC Unified Architecture - Part 15: Safety

9.4 PFH and PFD values of a logical safety communication link

total residual error rate for the safety communication channel SafetyErrorIntervalLimit Allowed for SIL range Total residual error rate for one logical connection of the safety function (PFH) Total residual error ... safety function, for a mission time of 20 years (PFDavg) 6 min Up to SIL
OPC-10000-15 – OPC Unified Architecture - Part 15: Safety

9.5 Safety manual

Frequently" in this context is defined as - more than once per day in SIL 2 and SIL 3 applications - more than once per week in SIL 4 applications ... relevant safety standards, such as the IEC 61508 series (according to the SIL as described) when used in live operation. For usage in live operation
OPC-10000-15 – OPC Unified Architecture - Part 15: Safety

Agreement of Use

used for applications requiring functional safety up to the safety integrity level ( SIL