Danfoss VLT 5000 Instruction Manual

Contents

Danfoss VLT 5000 Instruction Manual Manual pdf 7 page image

6 MG.60.N1.22 - VLT is a registered Danfoss trademarkVLT® 5000 / VLT® 6000 HVAC / VLT® 8000 AQUALONConceptLonWorksOverviewApplicationsLonWorks is both an existing standard andhardware developed by Echelon Corporation.Echelon's stated goal is to establish a com-modity solution to the presently dauntingproblems of designing and building controlnetworks.The result is LonMark Interoperability whichmakes it possible for independent networkdevices to operate together over aLonWorks network. The LonMark programwas developed to address interoperabilityissues. As a result, the LonMarkInteroperability Association Task Groups(LonUsers Groups) were developed. Thetask groups determine that each device onthe network has an object definition, createThe LonWorks communications structure issimilar to that of a local area network (LAN)in that messages are continually exchangedbetween a number of processors. ALonWorks system is a determined localoperating network (LON). LON technologyoffers a means for integrating variousdistributed systems that perform sensing,monitoring, control, and other automatedfunctions. A LON allows these intelligentdevices to communicate with one anotherthrough an assortment of communicationsmedia using a standard protocol.LON technology supports distributed, peer-to-peer communications. That is, individualnetwork devices can communicate directlywith one another without need for a centralcontrol system. A LON is designed to movesense and control messages which aretypically very short and which containcommands and status information thattrigger actions. LON performance is viewedin terms of transactions completed persecond and response time. Control systemsdo not need vast amounts of data, but theydo demand that the messages they sendand receive are absolutely correct. The criticalfactor in LON technology is the assuranceof correct signal transmission and verification.An important LonWorks benefit is thenetwork’s ability to communicate acrossdifferent types of transmission media. TheNEURON chip is the heart of the LonWorkssystem. The N EURON chip's commu-nication port allows for the use oftransceivers for other media (such as coaxand fiber optic) to meet special needs.LonWorks control devices are called nodes.Physically, each node consists of a NEURONchip and a transceiver. With proper design,the nodes become building blocks that canbe applied to control a variety of tasks, suchas lighting or ventilating, integrating a varietyof communications media.The tasks which the nodes perform aredetermined by how they have beenconnected and configured. Becausehardware design, software design, andnetwork design may be independent in aLonWorks-based system, a node’s functioncan be programmed to accommodate thenetworks in which it will be used.standards and models to be used byparticular applications and create a commonplatform for presenting data. A standardnetwork variable type (SNVT) facilitatesinteroperability by providing a well definedinterface for communication betweendevices made by different manufacturers.The VLT Adjustable Frequency Drivesupports the node object and controllerstandard object definitions of LonMarkInteroperability.Customers are currently using LonWorks forprocess control, building automation, motorcontrol, elevator operation, life safetysystems, power and HVAC distribution andsimilar intelligent building applications.