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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With double evaluation, the rising and falling edges of signal A are evaluated.
The edge direction of signal A and the level at signal B determines whether count pulses are
generated in an upward or downward direction.
The following figure shows an example for double evaluation of 24 V and TTL count signals:
The following figure shows an example for double evaluation of RS422 count signals:
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