Rockwell Automation 1769-BOOLEAN Compact I/O Module Reference Manual - Manual (Page 24)

Publication 1769-RM016A-EN-P - July 2006
24 Module Operation
Example 5: Duration > 0, Delay = 0, Duration < TRUE Time
In this example, the output is configured with a duration time greater than 0, a
delay time equal to 0, and the configured duration time is shorter than the time
that the Boolean expression remains TRUE.
Again, since the configured duration time is greater than 0, a “One-shot” pulse
occurs on the output. The pulse starts at the same time as the FALSE to
TRUE transition of the Boolean expression because the configured delay time
is equal to 0. The “One-shot” pulse again lasts only as long as the configured
duration time even though the Boolean expression remains TRUE. The
second “One-shot” pulse occurs on the output since there was a FALSE to
TRUE transition in the Boolean expression after the first “One-shot” pulse is
completed.