
MAINTENANCE
B–63504EN/01
1. METHOD OF REPLACING BATTERY
631
When the battery voltage falls, APC alarms 306 to 308 are displayed on
the screen. When APC alarm 307 is displayed, replace the battery as soon
as possible. In general, the battery should be replaced within one or two
weeks of the alarm first appearing. This, however, depends on the number
of pulse coders being used.
If the battery voltage drops any further, the current positions for the pulse
coders will be lost. Turning on the power to the control unit in this state
results in APC alarm 300 (reference position return request alarm) being
issued. Return the tool to the reference position after replacing the battery.
So, FANUC recommends replacing the battery every year concerning
without the alarm occurring.
So, FANUC recommends replacing the battery every year concerning
without the alarm occurring.
The battery for the built–in absolute pulse coder is connected with the
servo amplifier.
Note that the attachment methods of the battery and ordering
specifications of battery are different from SERVO AMPLIFIER Alpha
series (SVM) to SERVO AMPLIFIER Beta series.
Replace the battery only while the power to the servo unit is on. If the
battery is replaced while the power is off, all of the absolute position
settings will be lost.
Replacement procedure is as follows.
(1)Turn the servo unit (machine) on.
(2)Place the machine in the emergency stop state.
(3)Confirm that the servo motors are not active.
(4)In case of SERVO AMPLIFIER Alfa series, confirm that the LED that
indicates DC link charging status is not light.
(5)Remove the battery and replace the battery.
(6)The replacement is complete. Turn the servo unit (machine) off.
1.3
BATTERY FOR
BUILT–IN ABSOLUTE
PULSE CODERS
(6 VDC)
Replacement procedure