Connecting Modbus and LonWorks Networks - FieldServer ...

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Translation ChallengesSingle vs Block Data TransferTHE SOLUTIONS‣ Use FieldServer’s s move functions to group dataneeded for a block transfer into one data array.‣ Plan the data blocks so that one poll contains nomore than one object/device. Thus, the absence ofone device does not prevent the transfer of datafrom a working device from going through.‣ Don’t t be scared of “empty” data array offsets if ithelps to structure a block for simple Modbusmapping.‣ Serve the block up to Modbus using one mapdescriptor only.
Single vs Block Data TransferModbus as a slave – Keep data map “large”contiguous‣ Why? Because you don’t t know how a client will structure itspoll, and if it polls for undefined points, the poll will fail.Lon Variable 1Lon Variable 2Lon Variable 3Lon Variable 4MovesServer SideData Array1 ServerData Arraymeans 1Server mapdescriptor ispossibleRemoteClient cannow poll theFieldServerusing largepoll lengthswithout fearof hittingundefinedregisters.
Page 1 and 2: Connecting Modbus andLonWorks Netwo
Page 3 and 4: The Modbus Standard‣ A truly open
Page 5 and 6: 0000165536Modbus Memory MapAddressF
Page 7 and 8: Modbus VariationsVariations resulti
Page 10 and 11: Modbus TCPDealing with Ethernet and
Page 12 and 13: LonWorks OverviewLonWorks Addressin
Page 14 and 15: LonWorks OverviewNetwork Managers
Page 16: LonWorks OverviewData Transfer - Up
Page 19 and 20: LonWorks OverviewNeuron ID’s vs P
Page 21 and 22: LonWorks ConfigurationBasic Configu
Page 23 and 24: Lonworks ConfigurationXIF for Basic
Page 25 and 26: Lonworks ConfigurationCommissioning
Page 28 and 29: Translation ChallengesData Resoluti
Page 30 and 31: Data ResolutionSNVT_Option Feature/
Page 32 and 33: Data ResolutionScalingManaging Floa
Page 34 and 35: Data ResolutionBit Packing//=======
Page 36 and 37: Translation ChallengesEngineering U
Page 38 and 39: Translation ChallengesSimple vs Str
Page 40 and 41: Simple vs Structured VariablesSelec
Page 44 and 45: Single vs Block Data TransferHelp!
Page 46 and 47: Translation ChallengesMaster/Slave
Page 48 and 49: Translation ChallengesMaster/Slave
Page 50 and 51: Master/Slave vs Peer/Peer Communica
Page 52 and 53: Translation ChallengesMultiple vs S
Page 54 and 55: Multiple vs Single Node Representat
Page 56 and 57: Multiple vs Single Node Representat
Page 58 and 59: Translation ChallengesLonMark vs Mo
Page 60 and 61: Questions?Marketing and Sales:Steve

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