
DRAW.
No.
TITLE
Pa
e
006
8
DESCRIPTIONDESIGNDATE EDIT
PERIODIC MAINTENANCE OF
BATTERY FOR THE ABSOLUTE
PULSECODER
B-65285E/03-01
FANUC LTD
[Caution No. 1 for battery replacement]
The Pulsecoder for the α series servo motor is not incorporated with a backup capacitor as
standard. To keep the absolute position information in the absolute Pulsecoder, you need to keep
the control power turned on during battery replacement. Follow the procedure explained below.
[Replacing procedure for the battery]
1. Make sure that the power to the SVM is on (the 7-segment LED on the front of the SVM
is on).
2. Make sure that the emergency stop button of the system has been pressed.
3. Make sure that the motor is not activated.
4. Make sure that the DC link charge LED of the SVM is off.
5. Remove the old battery, and install a new battery.
6. This completes the replacement. You can turn off the power to the system.
WARNING
1 When replacing the battery, be careful not to touch bare metal parts in
the panel. In particular, be careful not to touch any high-voltage
circuits due to the electric shock hazard.
2 Before replacing the battery, check that the DC link charge
confirmation LED on the front of the servo amplifier is off. Neglecting
this check creates an electric shock hazard.
3 Install the battery with correct polarity. If the battery is installed with
incorrect polarity, it may overheat, blow out, or catch fire.
4 Avoid a short-circuit between the +6 V and 0 V lines of a battery or
cable. A short-circuit may lead to a hot battery, an explosion, or fire.