User`s guide

Counter
5-109
Dialog Box
Count direction
The counter direction,
Up or Down. Tunable, except in Simulink’s external
mode.
Count event
The type of event that triggers the block to increment, decrement, or reset
the counter when received at the
Clk or Rst ports. Free running disables
the
Clk port, and counts continuously with the period specified by the
Sample time parameter.
Counter size
The range of integer values the block should count through before recycling
to zero.
Maximum count
The counter’s maximum value
when Counter size is set to User defined.
Tunable.