ProSoft Technology PLX8X-MNET-61850 - Manual (Page 212)

Glossary of Terms PLX8x-MNET-61850 ♦ Communication Gateway
User Manual Modbus TCP/IP to IEC 61850
Page 212 of 228 ProSoft Technology, Inc.
May 14, 2014
Interface Related Station Level Functions
Functions representing the interface of the SAS to the local station operator HMI
(Human Machine Interface), to a remote control center TCI (Telecontrol
Interface) or to the remote engineering workplace for monitoring and
maintenance TMI (Telemonitoring Interface). These functions communicate via
the logical interfaces 1 and 6 with the bay level, and via the logical interface 7
and the remote control interface to the outside world.
Interface Related Station Level Functions
Functions representing the interface of the SAS local station-operator HMI to a
remote control center Tele-Control Interface (TCI) or to the remote engineering
Tele-Monitoring Interface (TMI) for monitoring and maintenance purposes. These
functions communicate via the logical interfaces 1 and 6 with the bay level and
via logical interface 7 to technical services and via the remote control interface to
the outside world. Logically, there is no difference if the HMI is local or remote. In
the context of the substation, there exists at least a virtual interface for the SAS
at the boundary of the substation. The same is true for both the TCI and TMI.
These virtual interfaces may be realized in some implementations such as proxy
servers.
Internet Protocol
TCP/IP standard internet protocol defines the datagram that provides the basis of
connectionless packet delivery. It includes control and error message protocol
providing the equivalent functions to network services, layer 3, of the OSI
reference model for Open Systems Interconnection.
Interoperability
Ability of two or more IEDs from the same vendor, or different vendors, to
exchange information and use that information for correct execution of specified
functions.
ISO/IEC-8802-3
Communication technology according to ISO/IEC-8802-3.
L
Life Cycle
All phases from the feasibility/concept phase through to the final
decommissioning phase.
Link Layer
See Data Link Layer.
Local Area Network (LAN)
Communications network which typically covers the area within a building or
small industrial complex. In the context of the IEC-61850 standard, the area
within the substation.