Fanuc Power Mate i-D/H Operation Maintenance Handbook

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7.8.3 Replacing batteries for absolute pulse coder (β series
servo amplifier)
WARNING Absolute pulse coder battery replacement
When replacing the memory backup batteries, keep the power
to the machine (servo amplifier) switched on, and hold the ma-
chine at an emergency stop. Because this work must be carried
out while the power is kept switched on and the cabinet is open,
only the personnel who have been trained for safety are allowed
to engage in the work. When replacing the batteries, be careful
not to touch the highvoltage circuit section (marked
and
shielded with a shock hazard prevention cover). If you touch the
high–voltage circuit section when it is uncovered, you will get an
electric shock.
Prepare lithium battery in advance.
(1) Turn machine (servo amplifier) power ON.
(2) Remove the battery case from under the β series servo amplifier
module by holding the case at both sides and pulling downwards.
(3) Remove the connector the battery.
(4) Replace the battery, and connect the connector.
(5) Attach the battery case.
(6) Turn machine (servo amplifier) power OFF.
CAUTION Replace the batteries for absolute pulse coder when servo am-
plifier power is ON.
Replacing the batteries with power OFF causes the absolute
position stored in memory to be lost.

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