The reason for the occurrence of the last transfer to UPS battery power. The variable is set to: - noTransfer(1) - highLineVoltage(2) by an over voltage greater than the high transfer voltage. - brownout(3) five seconds and the line voltage is between 40% of the rated output voltage and the low transfer voltage. - blackout(4) seconds and the line voltage is between 40% of the rated output voltage and ground. - smallMomentarySag(5) than five seconds and the line voltage is between 40% of the rated output voltage and the low transfer voltage. - deepMomentarySag(6) than five seconds and the line voltage is between 40% of the rated output voltage and ground. The variable is set to - smallMomentarySpike(7) rate of change of input voltage less than ten volts per cycle. - largeMomentarySpike(8) a rate of change of input voltage greater than ten volts per cycle. - selfTest(9) - rateOfVoltageChange(10) the line voltage.