MTS Series 793 Application - Manual (Page 274)

MTS MultiPurpose TestWare® Data Acquisition Process Descriptions 274
How to Trigger a Process When the Buffer Is Full
By using the trigger or buffer full signal from one data acquisition process to start
another data acquisition process, you can acquire test data in very selective ways.
Example Suppose you want to create a procedure that will acquire 10 points of peak/valley
data every 100 cycles and store the data in a separate file in the Specimen. To do
this, you could create a procedure with a Level Crossing Data Acquisition
process, a Cyclic Command process, and a Peak/Valley Data Acquisition
process, as follows:
In this scenario, to ensure that the test ends properly, click Generate
Cycles.Done in the Procedure is done when box, or Generate Cycles.Done in
the Count Cycles process’ Interrupt box.
Here is how you would set up the processes:
1. Level Crossing Acquisition process (named “Count Cycles”):
– Master Signal: Ch 1 Count
– Level Increment: 1 cycle
– Total Samples: Continuous
– Buffer size: 100
– Destination: Discard data
2. Set up the Cyclic Command process (named “Generate Cycles”) to
generate 1000 cycles of the desired shape and at the desired amplitude and
frequency.
3. Peak/Valley Data Acquisition process (named “Acquire Data”):
– Master Signal: As desired
– Sensitivity: Appropriate for Master Signal (for example, 3mm)
– Total Samples: 10
– Signals: As desired
– Buffer size: 10
– Destination: User-specified data file
– User Data File: As desired