FS-8700-21 LonWorks ManualPage 18 of 62
6.2.3 Driver Related Map Descriptor Parameters
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| Name of Node to fetch data from or send data to. Needed for Explicit |
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| One of the node names |
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| specified | in “Client | Node |
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| Addressing. |
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| Descriptors” above |
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| SNVT_Index |
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| Server Network Variable Index |
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| SNVT_Type |
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| Standard network variable type of the data |
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| See Appendix D |
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| SNVT_Option* |
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| Specifies which record out of a complex SNVT we are after. |
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| See Appendix A.9.1 |
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| SNVT_Units* |
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| Specifies the measurement units if something other than Metric is |
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| See Appendix A.9.2 |
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| required |
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| Specifies the length in bytes of an UNVT. This Parameter is compulsory |
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| UNVT_Byte_Length* |
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| when SNVT_Type is set to UNVT, the parameter is not used on |
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| conjunction with SNVT’s |
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| Specifies the Type Number to apply to this particular UNVT. This |
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| UNVT_ID |
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| Parameter is optional when SNVT_Type is set to UNVT, The parameter |
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| A.1. |
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| is not used on conjunction with SNVT’s |
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| NV_Min_Value* |
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| Network Variable updates with values less than specified in this field |
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| See Appendix A.2 |
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| will be ignored. |
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| NV_Max_Value* |
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| Network Variable updates with values higher than specified in this field |
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| See Appendix A.2 |
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| will be ignored. |
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| Network Variable updates where the value’s delta change is less than |
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| NV_Delta_Value* |
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| specified in this field will be ignored unless the Max_Scan_Time |
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| See Appendix A.2 |
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| Condition has been met. Compulsory for Throttling Lon Functions only. |
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| Not used on other Lon Functions. |
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| NV_Selfdoc_Text* |
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| The |
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| Normal | Text up | to a |
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| length of 40 characters |
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6.2.4 Timing Parameters
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| Scan_Interval* |
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| Seconds per scan |
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| 2s |
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| Min_Scan_Time* |
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| Minimum Scan Time in seconds. Compulsory for Throttling Lon Functions only. Not |
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| See | Appendix |
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| used on other Lon Functions. |
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| A.3 |
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| Max_Scan_Time* |
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| Maximum Scan Time in seconds. Compulsory for Throttling Lon Functions only. Not |
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| See | Appendix |
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| used on other Lon Functions. |
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| A.3 |
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FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web: www.fieldserver.com Tel: (408) 262 2299 Fax: (408) 262 2269 Toll Free: (888) 509 1970 email: support@fieldserver.com
