Somat eDAQlite, Руководство пользователя

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Somat eDAQ
lite
86 I2773-4.
4
en
4.8 Networking eDAQ
lite
/eDAQ Systems
Networking allows multiple eDAQ lite /eDAQ systems to acquire data synchronously
using a single master sample rate (MSR) clock source. TCE supports defining the test
setup configurations for networked systems in a single test setup file and coordinates
most test control tasks for the network. For information on setting up the networked
systems, see
“Networking eDAQlite /eDAQ Systems” on page 39 .
NOTE
When an eDAQ lite is configured as either a master or a slave and a power failure or
an error reset occurs, the eDAQ
lite
does not attempt to start a new test run.
The first step is to define the set of eDAQ
lite
/eDAQ systems used in the test in the
network setup window. The networked nodes can consist of any combination of eDAQ
and eDAQ
lite
systems. Configure one node as the master or the GPS master and the
rest of the nodes as slaves. The choice of which system is the master is largely
arbitrary.
NOTE
All nodes in a network configuration must have the same master sample rate value.
Proceed to define the transducer channels, computed channels, and DataModes for
the test in the same manner as for a single eDAQ
lite
. Multiple channel interactive
setup tasks such as the group DVM display and parallel transducer calibrations require
that the channel set reside on a individual network node. However, most
non-interactive features (e.g., group edits and group deletions) are supported across
network nodes.
With the test setup definition completed and all transducer channels calibrated,
initialize and run the test in the same manner as for a single eDAQ
lite
test. TCE
coordinates all interaction between network nodes during initializations and test runs.
NOTE
Run-time displays can only display channels from one eDAQ lite /eDAQ at a time.
While largely transparent, the details of starting or previewing and stopping test runs
are discussed briefly below. TCE first prepares each slave eDAQ
lite /eDAQ for a test
run start or preview in a serial manner. The slave then waits for the master to assert
the MSR clock source for the test run to actually begin on the slave. During this waiting
period, the green and yellow LEDs on the slave blink in unison at a fairly slow rate. At
the start of the test run or preview, the master asserts the MSR clock source which
starts all test runs or previews synchronously. To stop a test run or preview, TCE stops
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