MAN0974-14-EN_XL7_XL7P_UM
July 6, 2022
Page 97 | 199
9.3.7 HSC Functions
The high-speed input on the XL7/XL7 PRIME 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 Di
sable 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.
