The four incremental encoder channels are for measuring time or frequency-based signals. In contrast to
the analog channels as well as to the digital inputs, the channels are not sampled at a selected, fixed rate,
but instead time intervals between slopes (transitions) or number of pulses of the digital signal are
measured.
The counters used (set individually for each of the 4 channels) achieve time resolutions of up to 31 ns
(32 MHz); which is far beyond the abilities of sampling procedures (under comparable conditions). The
sampling rate which the user must set is actually the rate at which the system evaluates the results of the
digital counter or the values of the quantities derived from the counters.The description of the Digital In-
and Outputs, Inputs for Incremental encoders.
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