Connecting Modbus and LonWorks Networks - FieldServer ...

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Translation ChallengesData ResolutionTHE CHALLENGE‣ LonWorks‣ Supports data types from 8-bit 8through to 64-bit and allowsfor corresponding resolutions in the different SNVT’s‣ LonWorks has two common SNVT’s s to manage binary datatransfer: SNVT_switch and SNVT_state. . Both are 16-bitSNVT’s.SNVT_switch is more popular.‣ Modbus‣ Supports two basic data types: 1-bit 1and 16-bit.‣ All Modbus variations that support 32-bit are applicationlayer enhancements that combine two registers at the lowerlevel‣ The challenge is matching the different resolutions in thetwo protocols to achieve the desired resolution for theapplication.
Translation ChallengesData ResolutionTHE SOLUTIONS‣ Use FieldServer’s s Scaling functions to scalevalues if this provides enough resolution‣ Use FieldServer’s s 16 to 32 bit move functions tocreate 32 bit values for perfect 32 bit resolution‣ Use FieldServer’s SNVT_Option feature inLonWorks to match a binary modbus value withthe state portion of SNVT_switch
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 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 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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