MTS Series 793 Application - Manual (Page 90)

MTS MultiPurpose TestWare®
About “Trigger” Signals
Working with MPT Processes 90
When buffer full
signals are sent
If you do not specify the number of samples to acquire for the acquisition
process, the process continuously samples and generates a buffer full signal
every time the buffer fills, until the process ends.
If you specify the number of samples to acquire, the process sends a buffer full
signal every time the buffer fills until the requested number of samples are
acquired.
Special uses
You can use a data acquisition buffer full signal to start and interrupt other
processes in your test.
For example, if you configure your data acquisition process to discard data when
the buffer fills (instead of saving it), the acquisition process can continuously
send buffer full signals to other processes without using up disk space.
About “Trigger” Signals
Note This document refers to trigger signals as various types of signals that
you can use to control the sequence of process execution within a test
procedure. These signals include <procedure (group)>.start, <procedure
(group)>.interrupt, process name.done, process name.buffer full, and
process name.trigger. For the sake of clarity, it is important to keep in
mind that the process name.trigger signal referred to in this section is
just one of the various types of trigger signals available to you when
designing test procedures.
Some processes can generate trigger signals when they detect the specified event.
These trigger signals are labeled process name.Trigger in your Start, Interrupt,
and Procedure is done when lists.
For example, if you created a digital input process named Input Monitor, the
trigger signal that appears in your signal lists would be labeled Input
Monitor.Trigger.
When trigger signals
are sent
You can configure these processes to trigger once or to trigger continuously.
When a process is set to trigger once, it generates a trigger when the specified
condition is met, and then generates a done signal. When a process is set to
trigger continuously, it continues to send triggers each time the specified
condition is met, and does not generate a done signal.
Note If you set up a process to trigger continuously, then the process will not
generate a done signal until it is interrupted. You should specify an
“Interrupt” signal or a “Procedure/Group is done when” signal to end a
continuously triggered process.