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      Codes & Standards - Purchase

      IEC 62541-4:2020

      OPC Unified Architecture - Part 4: Services
      SKU: iec_061113_108496 Published by IEC Publication Year 2020 3.0 Edition 475 pages

      Product Details

      • Overview
      IEC 62541-4:2020 is available as IEC 62541-4:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
      IEC 62541-4:2020 defines the OPC Unified Architecture (OPC UA) Services. The Services defined are the collection of abstract Remote Procedure Calls (RPC) that are implemented by OPC UA Servers and called by OPC UA Clients. All interactions between OPC UA Clients and Servers occur via these Services. The defined Services are considered abstract because no particular RPC mechanism for implementation is defined in this document. IEC 62541-6 specifies one or more concrete mappings supported for implementation. For example, one mapping in IEC 62541-6 is to XML Web Services. In that case the Services described in this document appear as the Web service methods in the WSDL contract. Not all OPC UA Servers will need to implement all of the defined Services. IEC 62541-7 defines the Profiles that dictate which Services need to be implemented in order to be compliant with a particular Profile This third edition cancels and replaces the second edition published in 2015. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
      a) Added ability to resend all data of monitored items in a Subscription using the ResendData Method.
      b) Added support for durable Subscriptions (lifetime of hours or days).
      c) Added Register2 and FindServersOnNetwork Services to support network-wide discovery using capability filters.
      d) Removed definition of software certificates. Will be defined in a future edition.
      e) Extended and partially revised the redundancy definition. Added sub-range definitions for ServiceLevel and added more terms for redundancy.
      f) Added a section on how to use Authorization Services to request user access tokens.
      g) Added JSON Web Tokens (JWTs) as a new user token.
      h) Added the concept of session-less service invocation.
      i) Added a generic structure that allows passing any number of attributes to the AddNodes Service.
      j) Added requirement to protect against user identity token attacks.
      k) Added new EncryptedSecret format for user identity tokens.

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      GST REG No R119441681
      QST REG No R1006017360

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      Select the subscription format that is right for you. Table with 13 rows and 3 columns, identifies features available and not available for the two different subscription formats - CSA Advantage TM and CSA OnDemand TM
      Features CSA AdvantageTM CSA OnDemandTM
      Offline access CSA AdvantageTM. feature available. Offline access CSA OnDemandTM. feature available. Offline access
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      My Files - create customized files by adding multiple clauses, tables or figures from the standard into your own personal File for quick reference CSA AdvantageTM. feature available. My Files - create customized files by adding multiple clauses, tables or figures from the standard into your own personal File for quick reference CSA OnDemandTM. feature not available. My Files - create customized files by adding multiple clauses, tables or figures from the standard into your own personal File for quick reference
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