MTS Series 793 Application - Manual (Page 46)

MTS MultiPurpose TestWare®
Considerations for Test Design and Execution
Performing Common Tasks 46
Design elements that
may lock up your
system
You can inadvertently design an MPT procedure that can lock up your system.
The cause is generally from:
• Requesting too much data acquisition or command generation, or
• Setting up a group process to repeat continuously when it does not contain
command or data acquisition processes. To understand this, think of
processes in these categories:
– Command and Data Acquisition—These processes initiate activity
within the machine, and wait for it to complete.
– Immediate Action (Digital Output and Program Control)— These
processes execute an action and complete immediately.
– Detectors (Digital Input and Data Limit)—These processes complete
immediately if their condition is initially met.
Note If you create a repeating group process that contains only “Immediate
Action” and “Detector” processes, care must be taken so that the
detectors do not complete and repeat a number of times in quick
succession without waiting for some other test activity. For example, if a
data limit is set up in a repeating group with no other actions, and the
data value always causes a limit detect, the system may lock up.
For more information
See “About Sequencing Processes” on page 87.