Date Code 20080110 IEC 61850 Communications H-5
SEL-387E Instruction Manual
MMS
Manufacturing Messaging Specification (MMS) provides services for the application-layer
transfer of real-time data within a substation LAN. MMS was developed as a network
independent data exchange protocol for industrial networks in the 1980s and standardized as
ISO 9506.
In theory, you can map IEC 61850 to any protocol. However, it can be unwieldy and quite
complicated to map objects and services to a protocol that only provides access to simple data
points via registers or index numbers. MMS supports complex named objects and flexible
services that enable mapping to IEC 61850 in a straightforward manner. This was why the UCA
users group used MMS for UCA from that start, and why the IEC chose to keep it for IEC 61850.
GOOSE
The Generic Object Oriented Substation Event (GOOSE) object within IEC 61850 is for high-
speed control messaging. IEC 61850 GOOSE automatically broadcasts messages containing
status, controls, and measured values onto the network for use by other devices. IEC 61850
GOOSE sends the messages several times, increasing the likelihood that other devices receive
the messages.
IEC 61850 GOOSE objects can quickly and conveniently transfer status, controls, and measured
values between peers on an IEC 61850 network. Configure SEL devices to respond to GOOSE
messages from other network with
AC
SEL
ERATOR
Architect SEL-5032 Software. Also,
configure outgoing GOOSE messages for SEL devices in
AC
SEL
ERATOR
Architect. See the
AC
SEL
ERATOR
Architect online help for more information.
Each IEC 61850 GOOSE sender includes a text identification string (GOOSE Control Block
Reference) in each outgoing message and an Ethernet multicast group address. Devices that
receive GOOSE messages use the text identification and multicast group to identify and filter
incoming GOOSE messages.
File Services
The Ethernet File System allows reading or writing data as files. The File System supports FTP.
The File System provides:
• A means for the devices to transfer data as files
• A hierarchical file structure for the device data (root level only for SEL-300 series
devices)
SCL Files
Substation Configuration Language (SCL) is an XML-based configuration language used to
support the exchange of database configuration data between different tools, which may come
from different manufacturers. There are four types of SCL files:
• IED Capability Description file (.ICD)
• System Specification Description (.SSD) file
• Substation Configuration Description file (.SCD)
• Configured IED Description file (.CID)
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