Echelon i.LON SmartServer Technical Information Page 72

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i.LON SmartServer 2.0 Programmer’s Reference
5-7
Property Description
<UCPTlogFileName>
The path of the data log file on the SmartServer flash disk, relative
to the /root/data folder and including the extension of the format.
By default, a data log file is stored in the root/data/Net/LON/i.LON
App (Internal) folder, and it is named Data Logger [x], where x is
the index number of the Data Logger functional block.
<DataPoint>
A Data Logger can record updates for multiple data points. The
data points for which the Data Logger will record updates are
defined by a list of <DataPoint> elements that have an xsi type
attribute of “UFPTdataLogger_DpRef ” and a dpType attribute of
“Input”.
When any of the data points defined by these elements are updated,
the Data Logger will record the updates into its log file. There are
several properties you need to configure within each data point
reference that determine when an update to that data point will be
logged. See the following table for descriptions of these data point
properties.
The data points monitored by a Data Logger are defined by a list of <DataPoint> elements that have
xsi type =“UFPTdataLogger_DpRef ” and dpType=“Input” attributes. The following table describes
the properties that should be defined within each data point reference.
Property Description
<UCPTname>
The name of the data point to be monitored by the Data
Logger in the following format:
<network/channel/device/functional block/data point>.
<UCPTlogMinDeltaTime>
The minimum amount of time that must pass between log
entries for the data point, in seconds. All updates will be
logged if this value is 0.0, or not defined.
This property has a maximum value of 214,748,364.0
seconds. The default is 0.0 seconds.
<UCPTlogMinDeltaValue>
This property applies to scalar data points only. Specify the
change in value required for an entry to the log to be made.
For example, if this property is set to 30.0, the value of the
data point being monitored must change by at least 30.0
during an update for the change to be recorded by the Data
Logger. All updates are logged if this value is 0.0, or not
defined.
This property has minimum and maximum floating point
values of +/-3.402823466e+038.
Note: If the format type used by the data point being
monitored is SNVT_temp_p#US or SNVT_temp#US, then
the value of this property returned by the Get function will be
displayed using the SNVT_temp_f#US_diff format type.
This rule applies to all formats that use the #US specifier.
<UCPTpollRate>
The poll rate for the Data Logger can be between 0 and
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