FS-8700-21 LonWorks ManualPage 22 of 62
6.3.4 Driver Related Map Descriptor Parameters
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| One of the node names |
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Node_Name |
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| Name of Node to fetch data from or send data to. Needed for |
| specified | in | “Client |
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| Explicit Addressing. |
| Node | Descriptors” |
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| 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 |
| See Appendix D |
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SNVT_Option |
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| Specifies which record out of a complex SNVT we are after. |
| See Appendix A.9.1 |
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SNVT_Units |
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| Specifies the measurement units if something other than |
| See Appendix A.9.2 |
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| Metric is required |
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| Specifies the length in bytes of an UNVT. This Parameter is | See | Appendix |
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UNVT_Byte_Length* |
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| compulsory when SNVT_Type is set to UNVT, the parameter is |
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| not used on conjunction with SNVT’s |
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| Specifies the Type Number to apply to this particular UNVT. | 0, | See |
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UNVT_ID |
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| This Parameter is optional when SNVT_Type is set to UNVT, the |
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| Appendix A.1. |
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| parameter 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 |
| See Appendix A.2 |
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| this field will be ignored. |
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NV_Max_Value* |
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| Network Variable updates with values higher than specified in |
| See Appendix A.2 |
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| this field will be ignored. |
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| Network Variable updates where the value’s delta change is |
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| less than specified in this field will be ignored unless the |
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NV_Delta_Value* |
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| Max_Scan_Time Condition has been met. Compulsory for |
| See Appendix A.2 |
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| Throttling Lon Functions only. Not used on other Lon |
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| Functions. |
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NV_Selfdoc_Text |
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| The |
| Normal | Text | up to a |
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| length of 40 characters |
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6.3.5 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 |
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| See | Appendix |
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| only. Not used on other Lon Functions. |
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Max_Scan_Time* |
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| Maximum Scan Time in seconds. Compulsory for Throttling Lon Functions |
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| See | Appendix |
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| only. Not used on other Lon Functions. |
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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
