Yaskawa Large Capacity Sigma II Series - Manual (Page 343)

8 Inspection, Maintenance, and Troubleshooting
8.1.3 Replacing Battery for Absolute Encoder
8-4
8.1.3 Replacing Battery for Absolute Encoder
If the voltage of the battery for an absolute encoder drops to approx. 2.7 V or less, an Abso-
lute Encoder Battery Alarm (A. 83) will occur in the SERVOPACK. This alarm occurs when
the SERVOPACK receives a signal from the absolute encoder when the power to the SER-
VOPACK is turned ON. Therefore, the SERVOPACK will not give an alarm when the bat-
tery voltage drops below the minimum voltage level while the power is being supplied to the
SERVOPACK.
Refer to 4.7.3 Handling Batteries for the battery type recommended for absolute encoders.
Replace the battery using the following procedure if the battery voltage drops below the
minimum required battery voltage.
„ Battery Replacement Procedure
1. Replace the battery while the control power to the SERVOPACK is ON.
2. After replacement, turn OFF the power to the SERVOPACK in order to clear the Abso-
lute Encoder Battery Alarm (A. 83).
3. Turn ON the power to the SERVOPACK again and confirm that it operates properly to
complete battery replacement.
The absolute encoder data will be lost when the control power to the SERVOPACK is turned OFF and
when the encoder cable is disconnected from the battery. If the data is lost, refer to 4.7.4 Absolute
Encoder Setup and initialize the absolute encoder.
IMPORTANT