IEC 62541-3:2020
Collections
International IEC standards
Publication date
July 2020
Number of pages
252 p.
Reference
IEC 62541-3:2020
IEC 62541-3:2020
July 2020
International standard
Current
OPC Unified Architecture - Part 3: Address Space Model
IEC 62541-3:2020 defines the OPC Unified Architecture (OPC UA) AddressSpace and its Objects. This document is the OPC UA meta model on which OPC UA information models are based. This third edition cancels and replaces the second edition published in 2015. This edition includes the following significant technical changes with respect to the previous edition:a) Added new improved approach for exposing structure definitions. An Attribute on the DataType Node now simply contains a binary description.b) Added new flags for Variables to indicate atomicity when reading or writing.c) Added Roles and Permissions to allow configuration of a role-based authorization.d) Added new data types: ?Union?, ?Decimal?, ?OptionSet?, ?DateString?, ?TimeString?, ?DurationString?, NormalizedString?, ?DecimalString?, and ?AudioDataType?.e) Added definition on how to use the ModellingRules OptionalPlaceHolder and MandatoryPlaceHolder for Methods.f) Added optional Properties ?MaxCharacters? and ?MaxByteStringLength? to Variable Nodes.
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OPC Unified Architecture - Part 3: Address Space Model
IEC 62541-3:2020 defines the OPC Unified Architecture (OPC UA) AddressSpace and its Objects. This document is the OPC UA meta model on which OPC UA information models are based. This third edition cancels and replaces the second edition published in 2015. This edition includes the following significant technical changes with respect to the previous edition:
a) Added new improved approach for exposing structure definitions. An Attribute on the DataType Node now simply contains a binary description.
b) Added new flags for Variables to indicate atomicity when reading or writing.
c) Added Roles and Permissions to allow configuration of a role-based authorization.
d) Added new data types: ?Union?, ?Decimal?, ?OptionSet?, ?DateString?, ?TimeString?, ?DurationString?, NormalizedString?, ?DecimalString?, and ?AudioDataType?.
e) Added definition on how to use the ModellingRules OptionalPlaceHolder and MandatoryPlaceHolder for Methods.
f) Added optional Properties ?MaxCharacters? and ?MaxByteStringLength? to Variable Nodes.
IEC 62541-3:2020 defines the OPC Unified Architecture (OPC UA) AddressSpace and its Objects. This document is the OPC UA meta model on which OPC UA information models are based. This third edition cancels and replaces the second edition published in 2015. This edition includes the following significant technical changes with respect to the previous edition:
a) Added new improved approach for exposing structure definitions. An Attribute on the DataType Node now simply contains a binary description.
b) Added new flags for Variables to indicate atomicity when reading or writing.
c) Added Roles and Permissions to allow configuration of a role-based authorization.
d) Added new data types: ?Union?, ?Decimal?, ?OptionSet?, ?DateString?, ?TimeString?, ?DurationString?, NormalizedString?, ?DecimalString?, and ?AudioDataType?.
e) Added definition on how to use the ModellingRules OptionalPlaceHolder and MandatoryPlaceHolder for Methods.
f) Added optional Properties ?MaxCharacters? and ?MaxByteStringLength? to Variable Nodes.
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Replaced standards
(1)
IEC 62541-3:2015
March 2015
International standard
Cancelled
OPC unified architecture - Part 3: Address Space Model
IEC 62541-3:2015 describes the OPC Unified Architecture (OPC UA) AddressSpace and its Objects. It is the OPC UA meta model on which OPC UA information models are based. This second edition cancels and replaces the first edition published in 2010 and constitutes a technical revision. It includes the following changes: - Added rules for subtyping enumerations; - Added Property EnumValues; - Added Property ValueAsText; - Added EventType SystemStatusChangeEventType; - Added Properties MaxArrayLength and MaxStringLength; - Removed the concept of ModelParent; - Added EventType ProgressEventType; - Stated that it is allowed to use TAI in all places where UTC time is used; - Added Property EngineeringUnits; - Added ModellingRules OptionalPlaceholder and MandatoryPlaceholder.
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