CDV61850-6©1EC:2002 -4- 57WG10 INTRODUCTION Part 6 of this standard specifies a description language for configurations of electrical sub- station IEDs.This language is called Substation Configuration description Language(SCL).It is used to describe IED configurations and communication systems according to parts 5 and 7-x of this standard.It allows the formal description of the relations between the substation automation system and the substation (switchyard).At the application level the switchyard topology itself and the relation of the switchyard structure to the SAS functions (logical nodes)configured on the IEDs can be described. SCL allows the description of an IED configuration to be passed to a communication and ap- plication system engineering tool,and to pass back the whole system configuration descrip- tion to the IED configuration tool in a compatible way.Its main purpose is to allow the inter- operable exchange of communication system configuration data between an IED configura- tion tool and a system configuration tool of different manufacturers. The parts 8-x and 9-x of this standard,which are concerned with mappings of parts 7-x to specific communication stacks,may extend these definitions according to their need with ad- ditional parts,or just by restrictions on the way the values of objects have to be used. The relative position of this part of the standard in the context of other parts is depicted in Figure 1. 61850-7-4 Data Objects for Substation Applications 61850-7-3 Attributes and Attribute Class Definitions for Substations 61850-7-2 Abstract Communication Service Interface (ACSI) 61850-7-1 Communication Reference Model 61850-6 Substation Configuration Language 61850-5 Communication Requirements Figure 1-Relative position of this part within IEC 61850 Version 8CDV,August 2002CDV 61850-6 © IEC:2002 – 4 – 57/WG10 Version 8CDV, August 2002 INTRODUCTION Part 6 of this standard specifies a description language for configurations of electrical sub￾station IEDs. This language is called Substation Configuration description Language (SCL). It is used to describe IED configurations and communication systems according to parts 5 and 7-x of this standard. It allows the formal description of the relations between the substation automation system and the substation (switchyard). At the application level the switchyard topology itself and the relation of the switchyard structure to the SAS functions (logical nodes) configured on the IEDs can be described. SCL allows the description of an IED configuration to be passed to a communication and ap￾plication system engineering tool, and to pass back the whole system configuration descrip￾tion to the IED configuration tool in a compatible way. Its main purpose is to allow the inter￾operable exchange of communication system configuration data between an IED configura￾tion tool and a system configuration tool of different manufacturers. The parts 8-x and 9-x of this standard, which are concerned with mappings of parts 7-x to specific communication stacks, may extend these definitions according to their need with ad￾ditional parts, or just by restrictions on the way the values of objects have to be used. The relative position of this part of the standard in the context of other parts is depicted in Figure 1. 61850-7-4 Data Objects for Substation Applications 61850-7-1 Communication Reference Model 61850-6 Substation Configuration Language 61850-5 Communication Requirements 61850-7-2 Abstract Communication Service Interface (ACSI) 61850-7-3 Attributes and Attribute Class Definitions for Substations Figure 1 - Relative position of this part within IEC 61850