5.PERIODIC MAINTENANCE OF SERVO AMPLIFIER START-UP PROCEDURE B-65285EN/03
- 62 -
5.1 BATTERY FOR THE ABSOLUTE PULSECODER
The battery unit for the absolute Pulsecoder can be connected using
[Connection scheme 1] and [Connection scheme 2] explained below.
Refer to Subsection 9.3.2.6, "Battery" in "FANUC SERVO
AMPLIFIER αi series Descriptions (B-63282EN)" for details.
[Connection scheme 1]
Supplying power from one battery unit to more than one SVM
PSM
CXA2A
SVM SVM
Battery case
A06B-6050-K060
Battery
A06B-6050-K061
Connector
A06B-6110-K211
CXA2A CXA2A
CXA2B CXA2B
- If a low battery voltage or a battery voltage of 0 V is indicated by
an APC (absolute Pulsecoder) alarm, replace the battery.
If a battery voltage of 0 V is indicated, you need to make a zero
point return.
- The absolute Pulsecoder of the αis/αi series servo motor is
incorporated with a backup capacitor as standard. This backup
capacitor enables an absolute position detection to be continued
for about 10 minutes. Therefore, no zero point return need be
performed if the time during which servo amplifier power is kept
off for battery replacement is within 10 minutes.
On the contrary, the absolute Pulsecoder of the standard α series
servo motor is not incorporated with a backup capacitor. Be
careful when replacing the battery for this Pulsecoder. See
[Caution No. 1 for battery replacement] at the end of this section
for details.
- The service life of the batteries is about two years if they are used
in a six-axis configuration with αis/αi series servo motors and one
year if they are used in a six-axis configuration with α series servo
motors.
FANUC recommends that you replace the batteries periodically
according to the battery service life.
- The battery unit consists of four R20 alkaline batteries.
Commercial batteries can be used in the battery unit. The optional
battery offered by FANUC is A06B-6050-K061.