Echelon i.LON 100 e2 Internet Server - Manual (Page 55)

i. LON 100 Internet Server Programmer’s Reference 5-11
The interval resets each time the value of a data point is retrieved. By default this
value is 0 for NVL data points, and 0 NVC data points. You can change this value
by manually modifying it in the DP_NVL.XML or DP_NVC.XML configuration files.
Note that you can also temporarily override this value each time you call the
DataServerRead function. See the
DataServerRead function later in this chapter for
more information.
The <Result> parameter also includes an <NVL> element for each NVL data point that met
the selection criteria defined in the input supplied to the function. Note that the function
would return <NVC> element for each NVC data point that met the selection criteria defined
in the function’s input. The next section, DataServerGet, describes the properties included in
each of these elements.
You could use the list of data point elements returned by this function as input for the
DataServerGet function. The function would then return the configuration of each data point
included in the list.
<Data> Parameter <Data>
<iLONDataServer>
<UCPTdataPointType>NVL</UCPTdataPointType>
<UCPTstartIndex>0</UCPTstartIndex>
<UCPTcount>50</UCPTcount>
</iLONDataServer>
</Data>
<Result> Parameter <Result>
<iLONDataServer>
<DpNVL>
<SCPTobjMajVer>1</SCPTobjMajVer>
<SCPTobjMinVer>1</SCPTobjMinVer>
<UCPTlastUpdate>2002-06-24T16:03:58Z</UCPTlastUpdate>
<UCPTlifeTime>0</UCPTlifeTime>
</DpNVL>
<NVL>
<UCPTindex>0</UCPTindex>
<UCPTpointName>NVL_nviRequest</UCPTpointName>
<UCPTlocation>iLON100</UCPTlocation>
</NVL>
<NVL>
<UCPTindex>1</UCPTindex>
<UCPTpointName>NVL_nvoStatus</UCPTpointName>
<UCPTlocation>iLON100</UCPTlocation>
</NVL>
<NVL>
<UCPTindex>2</UCPTindex>
<UCPTpointName>NVL_nviTimeSet</UCPTpointName>
<UCPTlocation>iLON100</UCPTlocation>
</NVL>
<NVL>
<UCPTindex>3</UCPTindex>
<UCPTpointName>NVL_nviDateEvent</UCPTpointName>
<UCPTlocation>iLON100</UCPTlocation>
</NVL>
</iLONDataServer>
</Result>