
5.FEEDBACK SENSOR SPECIFICATIONS FOR THE βiS SERIES B-65302EN/01
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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 β64i
A and β128iA Pulsecoders, 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. The βA64B
Pulsecoder contains no backup capacitor.