Pulse Measurement - Mitsubishi Electric MELSEC iQ-R User Manual

Operation
The following shows operation of ratio conversion.
Count value
14
(Counter_0)
Input terminal
High
(Counter_0)
Low
Comparison output terminal
High
(Counter_0)
Low
Output terminal
High
(Counter_1)
Low
Performed in the flexible high-speed I/O control module
No. Description
(1) When the count value (Counter_0) becomes equal to or larger than the compare value, the compare output terminal (Counter_0) turns to High.
(2) When the rise (Low to High) of the compare output terminal (Counter_0) is detected, the output terminal (Counter_1) turns to High and turns to Low in
1ms.
(3) When the count value (Counter_0) falls below the compare value, the compare output terminal (Counter_0) turns to Low.
(4) When the count value (Counter_0) becomes equal to or larger than the compare value again, the compare output terminal (Counter_0) turns to High.
The operations 1) to 3) above are repeated, and signals of 3 pulses are output for inputs of 10 pulses.
4.9

Pulse Measurement

The ON width or OFF width of an input signal is measured.
ON
Input signal
OFF
ON width OFF width
The following describes a link and parameter example of a pulse measurement. With the example setting, the ON width (latch
value  25ns) of the input signal is measured. Note that this link example is for when a 32-bit unsigned multi function counter
block is used.
Link and parameter
The following shows a link example of the hardware logic outline window and a link example and parameter setting example
of the multi function counter block detail window.
■Hardware logic outline window
17 0 3 6 9 12 15 18 1 4
(3)
(1)
(2)
1ms
Input 10 pulses.
7 10 13 16 19 2 5 8 11 14 17 0
(4)
3
4 BLOCK LINK EXAMPLES
4.9 Pulse Measurement
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