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FS-8700-21 LonWorks Manual Page 22 of 62
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6.3.4 Driver Related Map Descriptor Parameters
Column Title
Function
Legal Values
Node_Name
Name of Node to fetch data from or send data to. Needed for
Explicit Addressing.
One of the node names
specified in “Client
Node Descriptors”
above
SNVT_Index
Server Network Variable Index
0-4095
SNVT_Type
Standard network variable type of the data
See Appendix D
SNVT_Option
Specifies which record out of a complex SNVT we are after.
See Appendix A.9.1
SNVT_Units
Specifies the measurement units if something other than
Metric is required
See Appendix A.9.2
UNVT_Byte_Length*
Specifies the length in bytes of an UNVT. This Parameter is
compulsory when SNVT_Type is set to UNVT, the parameter is
not used on conjunction with SNVT’s
1-255. See Appendix
A.1
UNVT_ID
Specifies the Type Number to apply to this particular UNVT.
This Parameter is optional when SNVT_Type is set to UNVT, the
parameter is not used on conjunction with SNVT’s
0, 146-255. See
Appendix A.1.
NV_Min_Value*
Network Variable updates with values less than specified in
this field will be ignored.
See Appendix A.2
NV_Max_Value*
Network Variable updates with values higher than specified in
this field will be ignored.
See Appendix A.2
NV_Delta_Value*
Network Variable updates where the value’s delta change is
less than specified in this field will be ignored unless the
Max_Scan_Time Condition has been met. Compulsory for
Throttling Lon Functions only. Not used on other Lon
Functions.
See Appendix A.2
NV_Selfdoc_Text
The Self-Documenting String for this Network Variable.
Normal Text up to a
length of 40 characters
6.3.5 Timing Parameters
Column Title
Function
Legal Values
Scan_Interval*
Seconds per scan
0-32000,
2s
Min_Scan_Time*
Minimum Scan Time in seconds. Compulsory for Throttling Lon Functions
only. Not used on other Lon Functions.
See Appendix
A.3
Max_Scan_Time*
Maximum Scan Time in seconds. Compulsory for Throttling Lon Functions
only. Not used on other Lon Functions.
See Appendix
A.3