The basics of counting, measurement and position detection
2.2 Basics of counting, measuring and position input (TM Count, TM PosInput, Compact CPU)
Counting, measurement and position detection
Function Manual, 12/2017, A5E32009889-AG
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The figure below shows another example of the Capture function with the following
configuration:
● Start value = 0
● Capture event upon rising edge at configured digital input
● Set counter to start value at gate start
● Reset counter value to start value after Capture event and continue counting.
The control bit (Page 185) EN_CAPTURE is used to enable the Capture function. The
feedback bit (Page 188) EVENT_CAP indicates that a counter value has been saved as a
Capture in the feedback interface. If you reset EN_CAPTURE, EVENT_CAP is also reset.
The status of a digital input is indicated by the respective feedback bit (Page 188) STS_DIm .
The figure below shows an example of the EN_CAPTURE and EVENT_CAP bits with use of
the Capture function by the rising edge at a digital input:
Note
The configured input filters delay the control signal of the corresponding digital input
.
The Capture function has no effect on the feedback bit STS_CNT and the LEDs UP and DN.
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