IEC 104 OPC server4.About this section4.1.This section provides reference information about the following issues:• IEC 61850 data modeling• Attributes• Status codesIEC 61850 data modeling4.2.General information about IEC 61850 data modeling4.2.1.The relationship between the IEC 61850 data modeling and IEC104 OPC Server isdescribed in this section.For each data class, there is a table giving a detailed description about the relation betweenthe IEC104 data and IEC 61850 data object attributes and services. The tables alsodescribe how the data is presented on the OPC Server name space.The columns in the tables have the following content types:• Name specifies the OPC item name of the attribute/service.• Type specifies the IEC 61850 type of the attribute.• Value/ Value range specifies the allowed values and ranges of the attribute/service.• Mandatory/Optional specifies whether the attribute is considered as mandatory oroptional according to the IEC 61850 standard.• IEC104 information element specifies the IEC104 information element related tothe attribute/service.• OPC data types specify the OPC data type used for the OPC item.Single point status (SPS)4.2.2.OPC data typesProtocol informa-tion elementMandat-ory/OptionalValue/Value rangeTypeNameVT_BOOLSPI(0=ON, 1=OFF)MTRUE | FALSEBOOLEANstValVT_I4BL, SB, NT, IVMQualityqVT_DATECP24Time2aCP56Time2aMTimeStampt89COM600 series 5.01MRS758690Master Protocols (Ethernet) and Applications Technical Refer-ence Manual
