Horner APG XL4 OCS - Manual (Page 51)

MAN0964-01-EN CH.11
June 29, 2012 Page 51 of 122
Width High 1 µs Counts – In this sub-mode the accumulator value will contain the number of 1 µs
counts the pulse is high.
Width Low 1 µs Counts - In this sub-mode the accumulator value will contain the number of 1 µs counts
the pulse is low.
11.3.4 Period Measurement
In period measurement mode, the high-speed input can measure the period of a pulse stream in
one of two modes and provides a continuous indication of the last sampled value. In this mode
the Disable and Latch special functions are allowed. Please see section 11.2 for a description of
these functions.
Period Rising Edges 1 µs Counts – In this sub-mode the period of the input signal is reported in
one (1) µs units. The period measurement will start on the rising edge of the input.
Period Falling Edges 1 µs Counts – In this sub-mode the period of the input signal is reported in
one (1) µs units. The period measurement will start on the falling edge of the input.
11.2.5 Quadrature
Quadrature mode uses two HSC inputs, any of the four HSC inputs can be assigned for this
purpose.
Quadrature mode works much like the totalizer except the accumulator will automatically
increment or decrement based on the rotation phase of the two inputs. See the following
example for more details. Quadrature inputs are typically used for reporting the value of an
encoder.
Width High
Width Low
Period from Rising Edge
Period from Falling Edge