1. METHOD OF REPLACING BATTERY
– 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 with ai series servo
motors and one year with a series servo motors.
FANUC recommends that you replace the batteries periodically
according to the battery service life.
– The built–in batteries are not commercially available. They must be
purchased from FANUC. So, FANUC recommends that you keep
1 When using the built–in batteries (A06B–6073–K001), do
not connect them to the BATL (B3) of connector CXA2A/
The output voltages from different SVM batteries may be
short–circuited, resulting in the batteries becoming very hot.
2 Do not connect more than one battery to the same BATL
(B3) line. If the output voltage is different between the
batteries, they may be short–circuited, resulting in the
batteries becoming very hot.
3 Install the battery with correct polarity. If the battery is
installed with incorrect polarity, it may overheat, blow out, or