MAN0974-09-EN_XL7_UserManual
March 4
th
, 2019
Page 92 | 185
12.3.6 Register Match
All counter modes support a register match function. When the accumulator value matches the
Match 1 or Match 2 value setup in %AQ registers a high-speed output with either turn on, turn
off or toggle based on settings in Cscape.
12.3.7 HSC Functions
The high-speed input on the XL7 contains many optional tasks. All of which can be disabled, or
set to an internal pre-assigned register (Assigned %Q) or to one of the external high speed
inputs (External Input #1, 2, 3,
or 4), or they can be set as an “overflow interrupt” or
“underflow interrupt” meaning that they will occur when either the Overflow or Underflow
input has been activated.
Disable
: When the Disable function is active, it will “disable” the
high-speed inputs and no
longer count pulses until it is re-enabled
Latch: When the Latch function is active, it takes the current value of the Accumulator and
moves it into the “Latch Value” register
Preload: When the pre-
load function is active, it will take the value from the “Preload” register
and put it into the “Accumulator” for
the corresponding Counter.
Clear
: When the clear function is active, it will move a value of 0 into the “Accumulator” for
the corresponding counter.
Marker: When the marker function is enabled, it acts as a dynamic enable/disable for the
Disable, Latch, Preload, and Clear functions. I
f the marker is enabled and “Assigned %Q” is
selected, then both the “Disable” and the “Disable Marker” bits need to be set high in order to
disable the high-speed input. If the Marker is set for one of the inputs, then the input will need
to be “High” in order to use any of the Disable,
Clear, Preload, or Latch functions.
