ABB RELION REL670, Руководство по установке и пусконаладке

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About this chapter Chapter 9
Establishing connection and
verifying the LON communication
4.1 The LON Protocol
The LON protocol is specified in the LonTalkProtocol Specification Version 3 from Echelon
Corporation. This protocol is designed for communication in control networks and is a
peer-to-peer protocol where all the devices connected to the network can communicate with
each other directly. For more information of the bay-to-bay communication, refer to the section
Multiple command function
4.2 Hardware and software modules
The hardware needed for applying LON communication depends on the application, but one
very central unit needed is the LON Star Coupler and optical fibres connecting the star coupler
to the terminals. To interface the IEDs from MicroSCADA, the application library LIB 670 is
required.
The HV Control670 software module is included in the LIB 520 high-voltage process package,
which is a part of the Application Software Library within MicroSCADA applications.
The HV Control670 software module is used for control functions in 670IEDs. This module con-
tains the process picture, dialogues and a tool to generate the process database for the control
application in MicroSCADA.
Use the LNT, LON Network Tool to set the LON communication. This is a software tool applied
as one node on the LON bus. In order to communicate via LON, the IEDs need to know which
node addresses the other connected IEDs have, and which network variable selectors should be
used. This is organized by the LNT.
The node address is transferred to the LNT via the local HMI by setting the parameter Service-
PinMsg=YES. The node address is sent to the LNT via the LON bus, or the LNT can scan the
network for new nodes.
The communication speed of the LON bus is set to the default of 1.25 Mbit/s.
The setting parameters for the LON communication are set via the local HMI. Refer to the Tech-
nical reference manual for setting parameters specifications.
The path to LON settings in the local HMI is:
Settings\General settings\Communication\SLM configuration\Rear optical LON port
Use the LNT, LON Network Tool to set the LON communication. This is a software tool applied
as one node on the LON bus. In order to communicate via LON, the terminals need to know
which node addresses the other connected terminals have, and which network variable selectors
should be used. This is organised by the LNT.
The node address is transferred to the LNT via the local HMI by setting the parameter Service-
PinMsg=YES. The node address is sent to the LNT via the LON bus, or the LNT can scan the
network for new nodes.
The communication speed of the LON bus is set to the default of 1.25 Mbit/s. This can be
changed by the LNT.