ABB Relion REG670, Техническое руководство

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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. The LON bus also has an open concept, so that the
terminals can communicate with external devices using the same standard of network
variables.
Introduction of LON protocol
For more information, refer to LON bus, LonWorks Network in Protection and
Control, User’s manual and Technical description.
LON protocol
Configuration of LON
LON network tool (LNT) is a multi-purpose tool for LonWorks network
configuration. All the functions required for setting up and configuring a LonWorks
network, is easily accessible on a single tool program.
Activate LON Communication
Activate LON communication in the Parameter Setting tool under Main Menu/
Configuration/Communication/Station communication/ LON/HORZCOMM:
1
, where Operation must be set to ON .
Add LON Device Types LNT
A new device is added to LON Network Tool from the Device menu or by installing
the device from the ABB LON Device Types package for LNT 505 using SLDT
package version 1p2 r04.
LON net address
To establish a LON connection, the IED has to be given a unique net address. The net
address consists of a subnet and node number. This is accomplished with the LON
Network Tool by creating one device for each IED.
1MRK502052-UEN B
Section 18
Station communication
1003
Technical manual