User Guide

FS-8700-21 LonWorks Manual Page 12 of 62
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5.2.4 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_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 (e.g. Metric or English)
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 in
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.3
NV_Selfdoc_Text*
The Self-Documenting String for this Network Variable.
Normal Text up to a
length of 40 characters
5.2.5 Timing Parameters
Column Title
Function
Legal Values
Scan_Interval
Seconds per scan
0-32000
Min_Scan_Time
Minimum Scan Time in seconds.
See Appendix A.3
Max_Scan_Time
Maximum Scan Time in seconds.
See Appendix A.3