ABB Relion 670 Series Communication Protocol Manual

Also see for Relion 670 series: Quick start guide Quick start guide Application guide Application guide Commissioning manual

ABB Relion 670 Series Communication Protocol Manual Manual pdf 17 page image

Section 3 LON operation principle3.1 Operation principle IP14439-1 v2M15083-3 v3The speed of the network depends on the medium and transceiver design. With protection andcontrol devices, fiber optic media is used, which enables the use of the maximum speed of 1.25Mbits/s. The protocol is a peer-to-peer protocol where all the devices connected to thenetwork can communicate with each other. The own subnet and node number are identifyingthe nodes (max. 255 subnets, 127 nodes per one subnet).The LON bus links the different parts of the protection and control system. The measuredvalues, status information, and event information are spontaneously sent to the higher-leveldevices. The higher-level devices can read and write memorized values, setting values, andother parameter data when required. The LON bus also enables the bay level devices tocommunicate with each other to deliver, for example, interlocking information among theterminals without the need of a bus master.The LonTalk protocol supports two types of application layer objects: network variables andexplicit messages. Network variables are used to deliver short messages, such as measuringvalues, status information, and interlocking/blocking signals. Explicit messages are used totransfer longer pieces of information, such as events and explicit read and write messages toaccess device data.The benefits achieved from using the LON bus in protection and control systems include directcommunication among all terminals in the system and support for multi-masterimplementations. The LON bus also has an open concept, so that the terminals cancommunicate with external devices using the same standard of network variables.3.1.1 LON protocol M15083-11 v13.1.1.1 Configuration of LON M15083-13 v3LON network tool (LNT) is a multi-purpose tool for LonWorks network configuration. All thefunctions required for setting up and configuring a LonWorks network, is easily accessible on asingle tool program.3.1.1.2 Activate LON Communication M15083-16 v3Activate LON communication in the Parameter Setting tool under Main Menu/Configuration/Communication/Station communication/ LON/HORZCOMM:1, whereOperation must be settoON.3.1.1.3 Add LON Device Types LNT M15083-19 v3A new device is added to LON Network Tool from the Device menu or by installing the devicefrom the ABB LON Device Types package for LNT 505 using SLDT package version 1p2 r04.1MRK 511 395-UEN E Section 3LON operation principleLON, 670 series 11Communication protocol manual© Copyright 2017 ABB. All rights reserved