7.8.2 Replacing batteries for absolute pulse coder (servo am-
plifier α series)
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 high–voltage circuit section (marked
shielded with a shock hazard prevention cover). If you touch the
high–voltage circuit section when it is uncovered, you will get an
Prepare lithium battery in advance.
(1) Turn machine (servo amplifier) power ON.
(2) Remove the battery case on the front panel of α series Servo Amp
The battery case can be removed by holding the top of the case and
pulling the case towards you.
(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.