BS EN IEC 62541-8:2020
$198.66
OPC Unified Architecture – Data Access
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 56 |
IEC 62541-8:2020 is available as IEC 62541-8:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 62541-8:2020 is part of the overall OPC Unified Architecture (OPC UA) standard series and defines the information model associated with Data Access (DA). It particularly includes additional VariableTypes and complementary descriptions of the NodeClasses and Attributes needed for Data Access, additional Properties, and other information and behaviour. The complete address space model, including all NodeClasses and Attributes is specified in IEC 62541-3. The services to detect and access data are specified in IEC 62541-4. 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 new VariableTypes for AnalogItems; b) added an Annex that specifies a recommended mapping of OPC UA Dataccess to OPC COM DataAccess; c) changed the ambiguous description of “Bad_NotConnected”; d) updated description for EUInformation to refer to latest revision of UNCEFACT units.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 5 | Annex ZA(normative)Normative references to international publicationswith their corresponding European publications |
| 7 | English CONTENTS |
| 10 | FOREWORD |
| 12 | 1 Scope 2 Normative references 3 Terms, definitions and abbreviated terms 3.1 Terms and definitions |
| 13 | 3.2 Abbreviated terms 4 Concepts |
| 14 | 5 Model 5.1 General Figures Figure 1 – OPC DataItems are linked to automation data |
| 15 | 5.2 SemanticsChanged 5.3 Variable Types 5.3.1 DataItemType Figure 2 – DataItem VariableType hierarchy |
| 16 | 5.3.2 AnalogItem VariableTypes Tables Table 1 – DataItemType definition |
| 17 | Table 2 – BaseAnalogType definition |
| 18 | Table 3 – AnalogItemType definition Table 4 – AnalogUnitType definition |
| 19 | 5.3.3 DiscreteItemType Table 5 – AnalogUnitRangeType definition Table 6 – DiscreteItemType definition |
| 20 | Table 7 – TwoStateDiscreteType definition Table 8 – MultiStateDiscreteType definition |
| 21 | Table 9 – MultiStateValueDiscreteType definition |
| 22 | 5.3.4 ArrayItemType Table 10 – ArrayItemType definition |
| 23 | Table 11 – YArrayItemType definition |
| 24 | Figure 3 – Graphical view of a YArrayItem |
| 25 | Table 12 – YArrayItem item description Table 13 – XYArrayItemType definition |
| 26 | Table 14 – ImageItemType definition |
| 27 | Table 15 – CubeItemType definition |
| 28 | 5.4 Address Space model Table 16 – NDimensionArrayItemType definition |
| 29 | 5.5 Attributes of DataItems Figure 4 – Representation of DataItems in the AddressSpace |
| 30 | 5.6 DataTypes 5.6.1 Overview 5.6.2 Range 5.6.3 EUInformation Table 17 – Range DataType structure Table 18 – Range definition Table 19 – EUInformation DataType structure |
| 31 | Table 20 – EUInformation definition Table 21 – Examples from UNECE Recommendation N° 20 |
| 32 | 5.6.4 ComplexNumberType 5.6.5 DoubleComplexNumberType Table 22 – ComplexNumberType DataType structure Table 23 – ComplexNumberType definition Table 24 – DoubleComplexNumberType DataType structure |
| 33 | 5.6.6 AxisInformation 5.6.7 AxisScaleEnumeration Table 25 – DoubleComplexNumberType definition Table 26 – AxisInformation DataType structure Table 27 – AxisScaleEnumeration values |
| 34 | 5.6.8 XVType 6 Data Access specific usage of Services 6.1 General 6.2 PercentDeadband Table 28 – AxisScaleEnumeration definition Table 29 – XVType DataType structure Table 30 – XVType definition |
| 35 | 6.3 Data Access status codes 6.3.1 Overview 6.3.2 Operation level result codes |
| 36 | Table 31 – Operation level result codes for BAD data quality Table 32 – Operation level result codes for UNCERTAIN data quality Table 33 – Operation level result codes for GOOD data quality |
| 37 | 6.3.3 LimitBits |
| 38 | Annex A (informative) OPC COM DA to UA mapping A.1 Overview A.2 Security considerations A.3 COM UA wrapper for OPC DA Server A.3.1 Information Model mapping |
| 39 | Figure A.1 – Sample OPC UA Information Model for OPC DA |
| 41 | Table A.1 – OPC COM DA to OPC UA Properties mapping |
| 42 | A.3.2 Data and error mapping |
| 43 | Figure A.2 – OPC COM DA to OPC UA data and error mapping |
| 44 | Figure A.3 – Status Code mapping Table A.2 – DataTypes and mapping |
| 45 | A.3.3 Read data Table A.3 – Quality mapping |
| 46 | A.3.4 Write Data Table A.4 – OPC DA Read error mapping Table A.5 – OPC DA Write error code mapping |
| 47 | A.3.5 Subscriptions A.4 COM UA proxy for DA Client A.4.1 Guidelines A.4.2 Information Model and Address Space mapping |
| 48 | Figure A.4 – Sample OPC DA mapping of OPC UA Information Model and Address Space |
| 51 | A.4.3 Data and error mapping Figure A.5 – OPC UA to OPC DA data & error mapping |
| 52 | Table A.6 – DataTypes and Mapping |
| 53 | A.4.4 Read data Figure A.6 – OPC UA Status Code to OPC DA quality mapping Table A.7 – Quality mapping |
| 54 | A.4.5 Write data A.4.6 Subscriptions Table A.8 – OPC UA Read error mapping Table A.9 – OPC UA Write error code mapping |
