Connecting Modbus and LonWorks Networks - FieldServer ...

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Translation ChallengesEngineering UnitsTHE SOLUTIONS‣ Use FieldServer’s s Scaling functions to scalevalues where data ranges differ.‣ Use FieldServer’s SNVT_Units feature inLonWorks to tell the LonWorks driver whetherthe data array value is represented as Imperialor SI.
Translation ChallengesSimple vs Structured VariablesTHE CHALLENGE‣ All Modbus variable types possess a simple structure.‣ This essentially means that one Modbus variablerepresents one value. The exception is when vendorsuse a register to represent 16 binary states.‣ LonWorks consists of a combination of SNVT’s s thathave both simple structures and “Structuredvariables”.‣ Structured variable consists of a variable thatrepresents multiple values, i.e. SNVT_Switch consistsof two values, the state portion representing a binaryvalue, and the value portion representing a percentage.Both are transferred as part of one variable.‣ The challenge is to group data from Modbus thatneeds to be sent as a structured variable inLonWorks, or to split structured variables fromLonWorks into simple Modbus variables.
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 38 and 39: Translation ChallengesSimple vs Str
Page 40 and 41: Simple vs Structured VariablesSelec
Page 42 and 43: Translation ChallengesSingle vs Blo
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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