"LVDT (SINGULARITY DETECTION) CIRCUIT SELF CALIBRATION
Each dispenser maintains an LVDT circuit compensation factor in NVRAM to
provide accurate calibration of the LVDT circuit. This factor is calculated and
adjusted by the firmware at run-time as bills are picked, thus providing
dynamic self calibration. On initial installation of a dispenser or when the
control board NVRAM is re-initialized, the compensation factor is set to 80H,
representing a nominal value of 1.
As bills are picked from each cassette, the average of the actual good bill
singularities will be measured across between 255 and 295 bills, depending
upon the number of bill picked during the last operation. The average is then
divided by the reference singularity of the bills being picked, to generate a
new compensation value. This is not done during the command
The compensation factor is stored as a byte in NVRAM with an initial
value of 80H. Adjustment will be limited to 25% (that is, 60H to 0A0H). This
value is returned in the Diagnostic Sensor Test response message.
Bill singularity is determined by comparing the actual singularity
multiplied by the compensation factor, to the reference singularity value for
Последний раз редактировалось Dan
11 апр 2013, 15:52, всего редактировалось 1 раз.
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