
MAINTENANCE
B–63844EN/02
1. METHOD OF REPLACING BATTERY
783
The battery unit for the absolute pulse coder can be connected using
[Connection scheme 1] and [Connection scheme 2] explained below.
PSM
CXA2A
SVM SVM
Battery case
A06B–6050–K060
Battery
A06B–6050–K061
Connector
A06B–6110–K211
CXA2A CXA2A
CXA2B CXA2B
– If a low battery voltage or a battery voltage of 0 V is indicated by an
APC (absolute pulse coder) alarm, replace the battery.
If a battery voltage of 0 V is indicated, you need to make a zero point
return.
– The absolute pulse coder of the ai series servo motor is incorporated
with a backup capacitor as standard. This backup capacitor enables an
absolute position detection to be continued for about 10 minutes.
Therefore, no zero point return need be performed if the time during
which servo amplifier power is kept off for battery replacement is
within 10 minutes.
On the contrary, the absolute pulse coder of the standard a series servo
motor is not incorporated with a backup capacitor. Be careful when
replacing the battery for this pulse coder. See [Caution No. 1 for
battery replacement] at the end of this section for details.
– The service life of the batteries is about two years if they are used in
a six–axis configuration with ai series servo motors and one year if
they are used in a six–axis configuration with a series servo motors.
FANUC recommends that you replace the batteries periodically
according to the battery service life.
– The battery unit consists of four R20 alkaline batteries. Commercial
batteries can be used in the battery unit. The optional battery offered
by FANUC is A06B–6050–K061.
1.2
BATTERY FOR THE
ABSOLUTE PULSE
CODER
[Connection scheme 1]
Supplying power from
one battery unit to more
than one SVM