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 196
11.2.3.3 $st , $et with Last time
By adding the $ut command in an Export Block Descriptor, you can ask the eWON to memorize the time of the last point exported,
this time can be used for the next export.
The last time is reset when the eWON boots.
Syntax:
$stL
L is the time parameter meaning last time.
11.2.4 $ut [Update Time]
This field has no parameter, it means that at the end of this exports, the time of the last point exported must be saved in the eWON
so that it can be used as a reference time for a later call.
Example:
This sequence will specify a time range from last time to current time AND will ask to update the last time at the end of the export.
The last time is stored on a per Tag basis if one Tag is specified for the export.
A global last time can also be saved if "ALL Tag" is specified in an export.
$stL$et_0$ut