User guide

eWON 500-2001-4001-4002 User Guide - Export Block Descriptors
eWON 500®2001®4001®4002® Version 4_3_0 - User Guide - 10/5/05 - ©ACT'L sa - Page 198
11.3.1 $dtHL [Historical Logging]
11.3.1.1 Export content
The Historical logging outputs the data from the File system for ONE or ALL fields.
The output format can be TEXT, HTML Table or BINARY.
The GRAPH format is also available IF only ONE Tag is specified.
A time range can also be specified for this export.
11.3.1.2 Detailed Example
11.3.1.3 Fields used
$dtHL $ftT $st_h4 $et_m0 $tnA1
$dtHL data type historical logging
$ftT output format requested is CSV
$st_h4 start time is current time – 4 hours
$et_0 end time is current time – 0 minutes Ù NOW
$tnA1 Tag history to output
Table 116: $dtHL detailed example
Fields Value if not specified
Mandatory
$dt
Optional
$ft Binary
$st 01/01/1970
$et 31/12/2030
$tn All
$ut No time update
$fn Export block descriptor
$ct Compression type
Table 117: $dt - fields used