ABB IEC 61850 Edition 2 Communication Protocol Manual

Also see for IEC 61850 Edition 2: Communication protocol manual

3.3 The IED section SEMOD129775-4 v7The IED section describes the complete IED as it is needed for IEC 61850communication and signal engineering. The data type template part of an IED maybe seen as part of the IED, even when separated in its own section. The IED's ICDfiles include the description of the logical nodes, their data type templates and theused or supported services. The structure of the IED section follows the definitionsmade in the IEC 61850 standard.Two basic IED types are used in system configuration.• Station level IEDsare located on the station level and are identified as client IEDs when they reador write information from or to the bay IEDs. This functionality is representedby logical nodes of group “Information (I)”. These are the logical nodes (LN)= ITCI, IHMI and ITMI. Client IEDs are the receiver of information inmonitoring direction and sender of commands (control). These logical nodeshave no data objects. They are only used to link the report control blocks(BRCBs) from the server IEDs. They have to read their information about thesignals and the signal configuration from the bay IEDs. This is possible bychecking all control blocks for a link to it as a client.• Bay level IEDsare located on the bay level and are identified as server IEDs when they reador write information vertically. When GOOSE messages are received, the baylevel IED also has the client role.Section 3 1MRK 511 393-UEN ASubstation Configuration description Language (SCL)26 670 series 2.2 IECCommunication protocol manual