FieldServer FS-8700-21 instruction manual Appendix A.9. Filtering Snvt Variables

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FS-8700-21 LonWorks ManualPage 28 of 62

Appendix A.9. Filtering SNVT Variables

Appendix A.9.1.

SNVT_Option Field

This field can be used to isolate a specific record within a complex SNVT. Appendix D shows which SNVTs are currently attributed with SNVT_Option capabilities.

Appendix A.9.2.

SNVT_Units Field

The measurement units of a SNVT is fixed as far as it is transported across the LonWorks network, but by the setting of the SNVT_Units field it is possible to specify how the data is made available in Data Arrays. For example SNVT_temp_f is always transported across the LonWorks network as degrees Celsius, but by setting the SNVT_Units field to Deg_F the measurement units of the Map Descriptor’s data will be set to degrees Fahrenheit. The following table shows which SNVT’s currently have SNVT_Units capabilities.

SNVT_Type

SNVT_Option

SNVT_UnitsLength

Measurement Units

SNVT_press_f

N/A

Inch_H20

1

Inches of water

 

 

 

 

 

SNVT_press_p

N/A

Inch_H20

1

Inches of water

 

 

 

 

 

 

 

Raw

1

Raw, unadjusted data

 

 

 

 

 

SNVT_temp

N/A

Deg_C

1

Degrees Celsius (°C)

 

 

 

 

 

 

 

Deg_F

1

Degrees Fahrenheit (°F)

 

 

 

 

 

SNVT_temp_f

N/A

Deg_C

1

Degrees Celsius (°C)

 

 

 

Deg_F

1

Degrees Fahrenheit (°F)

 

 

 

 

 

 

 

 

 

Raw

1

Raw, unadjusted data

 

 

 

 

 

SNVT_temp_p

N/A

Deg_C

1

Degrees Celsius (°C)

 

 

 

 

 

 

 

Deg_F

1

Degrees Fahrenheit (°F)

 

 

 

 

 

 

All

Raw

2

Raw, unadjusted data

 

 

 

 

 

SNVT_switch1

Value

Raw

1

Raw, unadjusted data

 

 

 

Percent

1

Percent (%)

 

 

 

 

 

 

 

 

State

Raw

1

Raw, unadjusted data

 

 

 

 

 

1See Also Appendix A.8

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Contents Driver Manual FS-8700-21 LonWorks Table of Contents Appendix D. SNVTType Network Management NV Updates/PollsLonWorks Program ID Calculation Spid Configuration Properties Clients/ServersExplicit/Implicit XIF FilesProvided by the Supplier of 3 rd Party Equipment Supplied by FieldServer Technologies for this driverAdditional files required for the Driver Service Pin Hardware ConnectionsPort Address Switch Neuron IDLon LED’s LonWorks Adapter Card FS-X40 onlySpecial considerations Map Descriptor Names Network Variable NamesImplicit Lon functions SNVTIndexClient vs Server Mapping Network Management CapabilityClient Side Mapping Connection Parameters Node Parameters FieldServer Related Map Descriptor ParametersDriver Related Map Descriptor Parameters Timing ParametersClient Side Map Descriptor Example Explicit Configurations Lon functionsDomain Table Setup Network Management Client Side Configuration Connections NodesFS-8700-21 LonWorks ManualPage 18 Map Descriptor Example 2 Polling UNVT’s Using Neuron ID to Address Devices Client Drivers only Server Side Configuration Connections FS-8700-21 LonWorks ManualPage 22 Map Descriptor Example Appendix A.1. Using UNVT’s Appendix A.2. Using NVMin, NVMax etcAppendix A.3. Throttling Mode Appendix A.4. XIF GenerationAppendix A.5. Configuration Properties Appendix A.6. LonMark Object CreationCfgnvui Appendix A.7. Node Status Operation Appendix A.8. Working with Binary DataAppendix A.9. Filtering Snvt Variables FS-8700-21 LonWorks Manual Appendix B. Vendor Information Appendix B.1. Echelon LonMakerAppendix B.3. Honeywell Care Appendix B.2. Neuron SystemsAppendix B.4. Tridium Jace Appendix B.5. Trane Rover Appendix C.2. Error Messages Appendix C.1. Debugging a LonWorks connection Hints and tipsAppendix C.3. Exposing Operation Statistics UINT32Appendix C.5. CirconSI Limitations Appendix C.4. Illegal Characters in Network Variable NamesAppendix C.7. Combining Explicit and Implicit Appendix D. SNVTType Location array element Kilo-British Thermal 65,535 Units Mega-British Thermal Sender Range Lower ID Data Length Suggested Data Array Formats KiloJoules per Kilogram FS-8700-21 LonWorks Manual Data Length Suggested Data Array Formats Float Measurement Units Values Range Invalid Value 163.840 Type Raw SNVTmassf FS-8700-21 LonWorks Manual Data Item Measurement Units Values Range Invalid Value Parts per Million ppm FS-8700-21 LonWorks Manual Measurement Units Values Range Invalid Value SNVTpumpsensor SNVTpumpsetmn Measurement Units Values Range Invalid Value SNVTpumpsetmn SNVTpwrfactf RPM Millimeters per Second Difference Type Measurement Units Values Range Invalid Value SNVTtempsetpt FS-8700-21 LonWorks Manual Kiloliters kl Measurement Units Values Range Invalid Value SNVTzerospan
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