{"id":245151,"date":"2024-10-19T16:07:09","date_gmt":"2024-10-19T16:07:09","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-iec-62541-82020\/"},"modified":"2024-10-25T11:07:00","modified_gmt":"2024-10-25T11:07:00","slug":"bs-en-iec-62541-82020","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-iec-62541-82020\/","title":{"rendered":"BS EN IEC 62541-8:2020"},"content":{"rendered":"

IEC 62541-8:2020 is available as IEC 62541-8:2020 RLV<\/span> which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.<\/p>\n

\n 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.\n<\/div>\n

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2<\/td>\nundefined <\/td>\n<\/tr>\n
5<\/td>\nAnnex ZA(normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n
7<\/td>\nEnglish
CONTENTS <\/td>\n<\/tr>\n
10<\/td>\nFOREWORD <\/td>\n<\/tr>\n
12<\/td>\n1 Scope
2 Normative references
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions <\/td>\n<\/tr>\n
13<\/td>\n3.2 Abbreviated terms
4 Concepts <\/td>\n<\/tr>\n
14<\/td>\n5 Model
5.1 General
Figures
Figure 1 \u2013 OPC DataItems are linked to automation data <\/td>\n<\/tr>\n
15<\/td>\n5.2 SemanticsChanged
5.3 Variable Types
5.3.1 DataItemType
Figure 2 \u2013 DataItem VariableType hierarchy <\/td>\n<\/tr>\n
16<\/td>\n5.3.2 AnalogItem VariableTypes
Tables
Table 1 \u2013 DataItemType definition <\/td>\n<\/tr>\n
17<\/td>\nTable 2 \u2013 BaseAnalogType definition <\/td>\n<\/tr>\n
18<\/td>\nTable 3 \u2013 AnalogItemType definition
Table 4 \u2013 AnalogUnitType definition <\/td>\n<\/tr>\n
19<\/td>\n5.3.3 DiscreteItemType
Table 5 \u2013 AnalogUnitRangeType definition
Table 6 \u2013 DiscreteItemType definition <\/td>\n<\/tr>\n
20<\/td>\nTable 7 \u2013 TwoStateDiscreteType definition
Table 8 \u2013 MultiStateDiscreteType definition <\/td>\n<\/tr>\n
21<\/td>\nTable 9 \u2013 MultiStateValueDiscreteType definition <\/td>\n<\/tr>\n
22<\/td>\n5.3.4 ArrayItemType
Table 10 \u2013 ArrayItemType definition <\/td>\n<\/tr>\n
23<\/td>\nTable 11 \u2013 YArrayItemType definition <\/td>\n<\/tr>\n
24<\/td>\nFigure 3 \u2013 Graphical view of a YArrayItem <\/td>\n<\/tr>\n
25<\/td>\nTable 12 \u2013 YArrayItem item description
Table 13 \u2013 XYArrayItemType definition <\/td>\n<\/tr>\n
26<\/td>\nTable 14 \u2013 ImageItemType definition <\/td>\n<\/tr>\n
27<\/td>\nTable 15 \u2013 CubeItemType definition <\/td>\n<\/tr>\n
28<\/td>\n5.4 Address Space model
Table 16 \u2013 NDimensionArrayItemType definition <\/td>\n<\/tr>\n
29<\/td>\n5.5 Attributes of DataItems
Figure 4 \u2013 Representation of DataItems in the AddressSpace <\/td>\n<\/tr>\n
30<\/td>\n5.6 DataTypes
5.6.1 Overview
5.6.2 Range
5.6.3 EUInformation
Table 17 \u2013 Range DataType structure
Table 18 \u2013 Range definition
Table 19 \u2013 EUInformation DataType structure <\/td>\n<\/tr>\n
31<\/td>\nTable 20 \u2013 EUInformation definition
Table 21 \u2013 Examples from UNECE Recommendation N\u00b0 20 <\/td>\n<\/tr>\n
32<\/td>\n5.6.4 ComplexNumberType
5.6.5 DoubleComplexNumberType
Table 22 \u2013 ComplexNumberType DataType structure
Table 23 \u2013 ComplexNumberType definition
Table 24 \u2013 DoubleComplexNumberType DataType structure <\/td>\n<\/tr>\n
33<\/td>\n5.6.6 AxisInformation
5.6.7 AxisScaleEnumeration
Table 25 \u2013 DoubleComplexNumberType definition
Table 26 \u2013 AxisInformation DataType structure
Table 27 \u2013 AxisScaleEnumeration values <\/td>\n<\/tr>\n
34<\/td>\n5.6.8 XVType
6 Data Access specific usage of Services
6.1 General
6.2 PercentDeadband
Table 28 \u2013 AxisScaleEnumeration definition
Table 29 \u2013 XVType DataType structure
Table 30 \u2013 XVType definition <\/td>\n<\/tr>\n
35<\/td>\n6.3 Data Access status codes
6.3.1 Overview
6.3.2 Operation level result codes <\/td>\n<\/tr>\n
36<\/td>\nTable 31 \u2013 Operation level result codes for BAD data quality
Table 32 \u2013 Operation level result codes for UNCERTAIN data quality
Table 33 \u2013 Operation level result codes for GOOD data quality <\/td>\n<\/tr>\n
37<\/td>\n6.3.3 LimitBits <\/td>\n<\/tr>\n
38<\/td>\nAnnex 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 <\/td>\n<\/tr>\n
39<\/td>\nFigure A.1 \u2013 Sample OPC UA Information Model for OPC DA <\/td>\n<\/tr>\n
41<\/td>\nTable A.1 \u2013 OPC COM DA to OPC UA Properties mapping <\/td>\n<\/tr>\n
42<\/td>\nA.3.2 Data and error mapping <\/td>\n<\/tr>\n
43<\/td>\nFigure A.2 \u2013 OPC COM DA to OPC UA data and error mapping <\/td>\n<\/tr>\n
44<\/td>\nFigure A.3 \u2013 Status Code mapping
Table A.2 \u2013 DataTypes and mapping <\/td>\n<\/tr>\n
45<\/td>\nA.3.3 Read data
Table A.3 \u2013 Quality mapping <\/td>\n<\/tr>\n
46<\/td>\nA.3.4 Write Data
Table A.4 \u2013 OPC DA Read error mapping
Table A.5 \u2013 OPC DA Write error code mapping <\/td>\n<\/tr>\n
47<\/td>\nA.3.5 Subscriptions
A.4 COM UA proxy for DA Client
A.4.1 Guidelines
A.4.2 Information Model and Address Space mapping <\/td>\n<\/tr>\n
48<\/td>\nFigure A.4 \u2013 Sample OPC DA mapping of OPC UA Information Model and Address Space <\/td>\n<\/tr>\n
51<\/td>\nA.4.3 Data and error mapping
Figure A.5 \u2013 OPC UA to OPC DA data & error mapping <\/td>\n<\/tr>\n
52<\/td>\nTable A.6 \u2013 DataTypes and Mapping <\/td>\n<\/tr>\n
53<\/td>\nA.4.4 Read data
Figure A.6 \u2013 OPC UA Status Code to OPC DA quality mapping
Table A.7 \u2013 Quality mapping <\/td>\n<\/tr>\n
54<\/td>\nA.4.5 Write data
A.4.6 Subscriptions
Table A.8 \u2013 OPC UA Read error mapping
Table A.9 \u2013 OPC UA Write error code mapping <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

OPC Unified Architecture – Data Access<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2020<\/td>\n56<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":245154,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[668,2641],"product_tag":[],"class_list":{"0":"post-245151","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-35-100-05","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/245151","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/245154"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=245151"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=245151"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=245151"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}