ABB Relion 670 series, Technical Manual

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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.
18.6.2 Settings
IP14441-1 v2
PID-593-SETTINGS v10
Table 848: HORZCOMM Non group settings (basic)
Name Values (Range) Unit Step Default Description
Operation Disabled
Enabled
- - Disabled Operation
PID-4147-SETTINGS v5
Table 849: ADE Non group settings (basic)
Name Values (Range) Unit Step Default Description
Operation Disabled
Enabled
- - Disabled Operation
TimerClass Slow
Normal
Fast
- - Slow Timer class
TimeDomain Local without DST
Local with DST
- - Local with DST Time domain
18.6.3 Operation principle
IP14439-1 v2
M15083-3 v2
The speed of the network depends on the medium and transceiver design. With protection and
control devices, fiber 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 and node number are identifying the nodes
(max. 255 subnets, 127 nodes per one subnet).
The LON bus links the different parts of the protection and control system. The measured values,
status information, and event information are spontaneously sent to the higher-level devices. The
higher-level devices can read and write memorized values, setting values, and other parameter
data when required. The LON bus also enables the bay level devices to communicate with each
other to deliver, for example, interlocking information among the terminals without the need of a
bus master.
The LonTalk protocol supports two types of application layer objects: network variables and
explicit messages. Network variables are used to deliver short messages, such as measuring
values, status information, and interlocking/blocking signals. Explicit messages are used to
transfer longer pieces of information, such as events and explicit read and write messages to
access device data.
The benefits achieved from using the LON bus in protection and control systems include direct
communication among all terminals in the system and support for multi-master implementations.
1MRK 502 066-UUS B Section 18
Station communication
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Technical manual