Somat eDAQlite, Руководство пользователя

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Somat eDAQ
lite
40 I2773-4.
4
en
Figure 2-6: Cable connections for networking multiple eDAQs.
2.5.2 Wireless Network
With a GPS module in an ELDIO layer, it is possible to configure the eDAQ
lite
to
generate the MSR clock synchronized with the GPS timing signal. This mode of
operation allows multiple eDAQ
lite
/eDAQ systems to wirelessly synchronize data.
Use this option only when the GPS module can maintain consistent GPS lock.
To set up GPS MSR clock generation, select the network mode as GPS Stand Alone
(see
“Adding a Network Node” on page 59 ), configure the ELDIO hardware to enable
GPS clock generation (see “ELDIO Configuration Options” on page 92 ) and define at
least one GPS channel in the test setup (see “Bus-Oriented Input Channels” on
page 121 ).
The test run start time is required to align the data acquired from different
eDAQ
lite
/eDAQ units. The eDAQ
lite
logs the start time in terms of GPS time in the
data file under the global keyword
DF_GPSStartRunTime_#
, where # is the run
number. The format for the date and time follows the ISO 9161 standard in the format
YYYY-MM-DDThh:mm:ss.ssss±hhmm.
NOTE
Because the eDAQ lite writes the start time based on UTC (Universal Time
Coordinates), the final ±hhmm of the start time, which is the signed offset from UTC,
is 0000.
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