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8.2.16 Preset Counter
Preset counter is the function to output a signal through DO when the totalized count reaches a preset
value.
For details of preset counter function, also see 10. “Function Description.”
The following parameters can be set here:
(1) Preset count value
(2) Preset output function
Notes
•
Preset counter works only for forward direction flow count.
•
To use the preset counter, it is necessary to set the DO function for output.
For how to set the DO function, see 8.2.14 “Digital I/O Function.”
•
To use the preset counter, it is recommended that you set a total volumetric flow unit or a count
value unit as indicating unit to check the operating condition.
For how to set the indicating unit, see 8.2.6 “Normal Indicating Unit.”
Preset count value
Preset value for preset counter is set.
Preset count value can be set within the range of 0 to 99999999.
Preset output function
The operation of DO output when the preset counter reaches the preset value can be selected. You
can select the operation of DO output from the items shown in the table below:
PRESET FUNCT.
Preset output function
1: HOLD
Output level is held
2: 50ms PULSE
One-shot pulse output of 50ms pulse width
3: 500ms PULSE
One-shot pulse output of 500ms pulse width
Note: If the preset output function is set to “50ms PULSE” or “500ms PULSE,”
select the preset count value to become 1, 2, 5, 25 or 125
×
10
n
. (If a value
not satisfying this condition is set, the preset output timing may be shifted
when the totalizer overflows.)
