
B–63833EN/03
4. POWER SUPPLY CONNECTION
47
Lithium battery
A02B–0200–K102
Connector
(BAT1)
Battery holder
Fig.4.4.2 Battery replacement
One battery unit can maintain current position data for six absolute pulse
coders for a year.
When the voltage of the battery becomes low, APC alarms 3n6 to 3n8 (n:
axis number) are displayed on the LCD display. When APC alarm 3n7
is displayed, replace the battery as soon as possible. In general, the battery
should be replaced within one or two weeks, however, this depends on the
number of pulse coders used.
If the voltage of the battery becomes any lower, the current positions for
the pulse coders can no longer be maintained. Turning on the power to
the control unit in this state causes APC alarm 3n0 (reference position
return request alarm) to occur. Return the tool to the reference position
after replacing the battery.
Therefore, FANUC recommends that the battery be replaced once a year
regardless of whether APC alarms are generated.
See Section 7.1.3 for details of connecting the battery to separate absolute
pulse coders.
4.4.3
Battery for Separate
Absolute Pulse Coders
(6VDC)