E6581918 1. Introduction VF-S15 is equipped with low voltage operation function which activates for back up operation using power supply from battery. This instruction manual explains low voltage operation function of VF-S15. 2. Low voltage operation function Even the case of power failure, low voltage operation enables the inverter to continue operation by switching its power supply to the battery.
E6581918 f297 : Low voltage operation upper limit frequency When Low voltage operation upper limit frequency (f297) =0.0, this function is disabled. When this function is activated, set this parameter larger than 0.1Hz. During low voltage operation, frequency set with this parameter is the upper limit frequency. Even though the frequency is set to the value lower than Lower limit frequency (ll), Low voltage operation upper limit frequency (f297) is the upper limit.
E6581918 4. Example of Low voltage operation <Example> 1. Switch to the battery - Undervoltage protection (moff) activates after power failure. - Be sure to turn off the power supply so that voltage is not applied to the battery when the power supply is recovered.