FieldServer LonWorks FS-8700-21 - Manual (Page 18)

FS-8700-21 LonWorks Manual Page 18 of 72
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Example
// Client Side Nodes
Nodes
Node_Name , Subnet_ID , Node_ID , Protocol
LON_1
, 1 , 1 , LonWorks
7.2.3 Client Side Map Descriptor Parameters
7.2.3.1 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 Section 7.2.2
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,
not used on other Lon Functions. It is possible to configure a start-
up write option for throttling Map Descriptor functions instead of
waiting for the minimum scan time to pass. Refer to Appendix A.3.
See Appendix A.2
NV_Selfdoc_Text* The Self-Documenting String for this Network Variable.
Normal Text up to a length
of 40 characters. Defaults to
"" for parameters using
string values and 0 for
parameters using numeric
values
7.2.3.2 Timing Parameters
Column Title Function Legal