8-23
8-5 Periodic Maintenance
8
Troubleshooting
Replacing the Absolute Encoder Battery
Replace the Absolute Encoder Backup Battery if it has been used for more than three years or if an
absolute encoder system down error (alarm code 40) has occurred.
Replacement Battery Model and Specifications
Mounting the Backup Battery
Mounting the Battery for the First Time
Connect the absolute encoder battery to the Servomotor, and then set up the absolute encoder.
Refer to Absolute Encoder Setup Procedure on page 6-5.
Once the absolute encoder battery is attached, it is recommended that the control power supply be
turned ON and OFF once a day to refresh the battery.
If you neglect to refresh the battery, battery errors will occur due to voltage delay in the battery.
Replacing the Battery
If a battery alarm occurs, the absolute encoder battery must be replaced.
Replace the battery with the control power supply of the Servo Drive ON. If the battery is replaced
with the control power supply of the Servo Drive OFF, data held in the encoder will be lost.
Clear the battery alarm by any of the following methods after you replace the absolute encoder
battery.
Use the alarm reset of the CN1 control input.
Clear the alarm by the alarm reset from the Parameter Unit. For details, refer to Alarm Reset on
page 6-21.
Select the Absolute Encoder tab page on CX-Drive and clear the battery alarm.
Note If the absolute encoder is cleared, or the absolute encoder is cleared using communications,
all error and rotation data will be lost and the absolute encoder must be set up again. For
details, refer to Absolute Encoder Setup on page 6-5.
Item Specifications
Name Absolute Encoder Backup Battery
Model R88A-BAT01G
Battery model ER6V (Toshiba)
Battery voltage 3.6 V
Current capacity 2000 mA
·h
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