Red Lion LEGEND - Manual (Page 19)

ADD/SUB (TWO INPUT ANTI-COINCIDENCE ADD/SUBTRACT)
This mode effectively separates count pulses that may simultaneously
appear at the two inputs. The Legend unit processes the count pulses into a
string of time-separated pulses, so the internal counter will not lose any
count pulses. Input A serves as the add input (count increments) and Input
B serves as the subtract input (count decrements).
ADD/ADD (TWO INPUT ANTI-COINCIDENCE ADD/ADD)
This mode effectively sums count pulses that may simultaneously
appear at the two inputs. The Legend unit processes the count pulses into a
string of time-separated pulses so the internal counter will not lose any
count pulses. Input A serves as an add input (count increments) and Input B
serves as an additional add input (count increments).
RESET ACTION
The count display can be reset to Zero, Preset 2, or to the Counter Load value.
The method of reset for the display can be automatic or by a user input. The type
of reset from a user input can be a Maintained or Momentary reset (Refer to
Program User Module for details). Automatic reset is covered in the next section.
Note: Response time for a manual reset is 10 msec maximum.
RESET TO ZERO
When reset, the Counter Display value will return to Zero.
RESET TO PRESET 2
When reset, the Counter Display value will return to the Preset 2 value.
Output 2 triggers when the count reaches zero.
RESET TO COUNTER LOAD
When reset, the Counter Display value will return to the Counter
Load value.
AUTOMATIC RESET
The Automatic reset mode can be enabled or disabled. The Counter display
will automatically reset to the programmed reset action when one of the
automatic reset modes is selected. A manual reset by a user input will cause
the count to reset regardless of the automatic reset mode. The following
choices are available:
OUT 1 (Reset at Beginning Of Output 1):
In this mode, the counter will reset when the count equals the preset 1
value. Output 1 can be timed or latched.
OUT 1 END (Reset at End Of Timed Output 1):
In this mode, the counter will reset after output 1 has timed out.
OUT 2 (Reset at Beginning Of Output 2):
In this mode, the counter will reset when the count equals the preset 2
value. Output 2 can be timed or latched.
OUT 2 END (Reset at End Of Timed Output 2):
In this mode, the counter will reset after output 2 has timed out.
OUT 1 & 2 (Reset at Beginning Of Output 1 or Output 2):
In this mode, the counter will reset when the count equals either preset 1 or
preset 2 value. Outputs 1 and 2 can be Timed or Latched.
OUT 1 & 2E (Reset at End Of Timed Output 1 or Output 2):
In this mode, the counter will reset after output 1 or output 2 has timed out.
NOTES
1. For Auto Reset modes, when operating between approximately ½ to
maximum count rate, all other presets should not occur within 1 to 6 counts
following the count value at which Auto Reset occurs. In Reset to Zero
modes, with positive preset values, this would apply to preset values
between 0 to 6 counts less than the Preset 2 value (when positive).
2. For Auto Reset at Out2 or Out1 & 2 modes, Output 1 will not activate if
Preset 1 is set to the same value as Preset 2 or Zero (for Reset to Preset or
Counter Load mode).
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