
5.FEEDBACK SENSOR SPECIFICATIONS FOR THE αiS/αi SERIES B-65262EN/03
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5.1.3 Absolute-type Pulsecoder
When the NC is turned off, the Pulsecoder position detection function
is backed up by battery. So, when the NC is next turned on, the
operator does not have to perform reference position return.
For backup, a battery unit must be installed in the NC or servo
amplifier.
If a low-battery indication appears on the NC, renew the battery as
soon as possible.
For the αi series Pulsecoder, the function is backed up for about 10
minutes by a backup capacitor when the battery is removed. In the
backup status, the battery can be replaced when the power to the NC
or servo amplifier is off.
The operator does not also have to perform reference position return
after replacing the feedback cable or servo amplifier.