Echelon i.LON 100 e2 Internet Server - Manual (Page 87)

i. LON 100 Internet Server Programmer’s Reference 6-15
6.2.1.5 DataLoggerClear
You can use the DataLoggerClear function to remove log entries from a Data Logger’s log
file. You can specify which Data Logger is to be affected, and which log entries will be
removed, by configuring the properties described in Table 19 into the parameter you
supply to the function.
NOTE: This function only deletes the log entries. You can delete the Data Logger itself with
the DataLoggerDelete function.
Table 19 DataLoggerClear Input Properties
Parameter Description
The index number of the Data Logger to be affected.
The name of the data point whose log entries are to be deleted. If you
do not fill in this property, the function will delete log entries for all
data points that the Data Logger is monitoring.
Use this property to specify the maximum number of log entries the
function will delete. If you do not fill in this property, the function will
delete all log entries for the applicable data point, or data points, that
occurred within the interval defined by the and
properties.
Use these fields to specify a time interval for the log entries to be
deleted. You can specify a start and stop time, or just a stop time.
If you specify a start and stop time and the number of log entries
during this interval exceeds the count entered, the function will delete
the first group of log entries recorded during the interval.
If you only specify a stop time and the number of log entries before this
time exceeds the count entered, the function will delete the first group
of log entries recorded before the stop time.
If you do not enter a start or stop time, the function will delete all log
entries for the applicable data points, up to the maximum.
You must enter the and properties as
timestamps in local time, with appended time zone indicators to denote
the difference between local time and UTC. For more information on
this format, see Local Times and Coordinated Universal Time on page
6-12.
The following call to DataLoggerClear deletes up to 200 log entries for data point
NVL_nviDlCount2. These entries must have occurred between 1/27/2002 and 11/28/2002
(both at one hour ahead of UTC) to be deleted.