safety PDU – OPC Unified Architecture – Part 15: Safety

OPC Unified Architecture – Part 15: Safety

v1.05.04

1Scope
2Normative references
3Terms, definitions, symbols, abbreviated terms and conventions
4Overview of OPC UA Safety
5General
6Safety communication layer services
7Safety communication layer protocol
- 7.1General
- 7.2SafetyProvider and SafetyConsumer
8Safety communication layer management
- 8.1General
- 8.2Safety function response time part of communication
9System requirements (SafetyProvider and SafetyConsumer)
10Assessment
11Profiles and Conformance Units
12Namespaces
- 12.1Namespace metadata
- 12.2Handling of OPC UA namespaces
Annex ASafety Namespace and mappings (Normative)
Annex BAdditional information (Informative)
Annex CInformation for assessment (Informative)
Bibliography

3.1.1.13 safety PDU

PDU transferred through the safety communication channel

Note 1

Note 1 to entry: The SPDU may include more than one copy of the SafetyData using differing coding structures and hash functions together with explicit parts of additional protections such as a key, a sequence count, or a time stamp mechanism.

Note 2 to entry: Redundant SCLs may provide two different versions of the SPDU for insertion into separate fields of the OPC UA frame.