25 EDGE DETECTION FUNCTION BLOCKS
25.1 Rising Edge Detector
845
25
2. Function block with EN/ENO
The following table lists the execution conditions and operation results.
• Timing chart
There is no operation error.
Execution condition Operation result
EN ENO (d)
TRUE (Executes operation) TRUE Operation output value
FALSE (Stops operation) FALSE Previous output value
ON ON ON ON
EN
OFF
ON
ON ON ON
(s)
OFF
ENO
OFF
ON
OFF
ON
OFF
ON
ON
(d)
When EN is off, (d) holds the output
of the previous scan.
When EN is on and on
the rising edge of (s),
(d) turns on.
At the next scan,
(d) turns off.
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