Rockwell Automation 1769-BOOLEAN Compact I/O Module Reference Manual - Manual (Page 26)

Publication 1769-RM016A-EN-P - July 2006
26 Module Operation
Example 7: Duration = 0, Delay > TRUE Time
In this example, the output is configured with a duration time equal to 0 (the
output will remain ON only if the Boolean expression remains TRUE) and a
delay time greater than 0. Conditions where the Boolean expression remains
TRUE both for less than and longer than the configured delay time are
illustrated.
The first instance that the Boolean expression goes to the TRUE state, but
does not remain continuously TRUE for a period of time exceeding the
configured delay time, it does not cause the output to turn ON. When this first
TRUE condition ends, the corresponding delay time event also ends. The next
time the Boolean expression becomes TRUE, a new delay time event begins.
This second TRUE event does continuously remain TRUE for longer than the
configured delay time and the output turns ON. The output remains ON until
the Boolean expression becomes FALSE, at which point it immediately turns
OFF since the configured duration time is 0.