Technical Manual for EA350 Analog Pulse Type Servo Driver V101 P8-19 bit2: Automatic restoration upon under-voltage of the encoder battery bit2=0: When an absolute encoder is used, if an alarm occurs due to under-voltage of the encoder battery, the alarm will be automatically reset when the encoder is powered on again after replacement of the battery; bit2=1: alarm can only be reset by setting AF-16 to 1 or 2 (clear encoder fault information). 203