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7.3.3.2 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

under Client Node Parameters

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.3

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

7.3.3.3 Timing Parameters

Column Title

Function

Legal

Values

Scan_Interval*

Seconds per scan

0-32000,

Min_Scan_Time*

Minimum Scan Time in seconds. Compulsory for Throttling Lon Functions only. Not used

on other Lon Functions.

See 0

Max_Scan_Time*

Maximum Scan Time in seconds. Compulsory for Throttling Lon Functions only. Not used

on other Lon Functions.

See 0

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