ABB Relion REG670, Technical Manual, Page: 1008 / 1298

18.4 LON communication protocol
18.4.1 Functionality
An optical network can be used within the substation automation system. This enables
communication with the IED through the LON bus from the operator’s workplace,
from the control center and also from other terminals.
LON communication protocol is specified in LonTalkProtocol Specification Version
3 from Echelon Corporation and is designed for communication in control networks.
These networks are characterized by high speed for data transfer, short messages (few
bytes), peer-to-peer communication, multiple communication media, low
maintenance, multivendor equipment, and low support costs. LonTalk supports the
needs of applications that cover a range of requirements. The protocol follows the
reference model for open system interconnection (OSI) designed by the International
Standardization Organization (ISO).
In this document the most common addresses for commands and events are available.
For other addresses, refer to section
"" .
It is assumed that the reader is familiar with LON communication protocol in general.
18.4.2 Settings
Table 735: HORZCOMM Non group settings (basic)
Name Values (Range) Unit Step Default Description
Operation Off
On
- - Off Operation
Table 736: ADE Non group settings (basic)
Name Values (Range) Unit Step Default Description
Operation Off
On
- - Off Operation
TimerClass Slow
Normal
Fast
- - Slow Timer class
TimeDomain Local without DST
Local with DST
- - Local with DST Time domain
18.4.3 Operation principle
The speed of the network depends on the medium and transceiver design. With
protection and control devices, fibre optic media is used, which enables the use of the
maximum speed of 1.25 Mbits/s. The protocol is a peer-to-peer protocol where all the
devices connected to the network can communicate with each other. The own subnet
Section 18
1MRK502052-UEN B
Station communication
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Technical manual