5-21
5-6
Replacing the Absolute Encoder Battery (ABS)
Replace the absolute encoder backup battery if it has been used for at least five years, or
if an A.83 (battery error) alarm occurs.
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Battery Model and Specifications
Item
Specification
Model and name
R88A-BAT01W (up to 5 kW), R88A-BAT02W (6 kW to 15 kW) (Absolute Encoder
Backup Battery Unit)
Battery model
ER3V (Toshiba)
Battery voltage
3.6 V
Current capacity
1,000 mA
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h
Note
Refer to
2-10 Absolute Encoder Backup Battery Specifications
for dimensions and wiring details.
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Battery Replacement Procedure
•
Replace the battery using the following replacement procedure. After replacing the battery, if a A.81
(backup error) alarm does not occur, the replacement is completed. If an A.81 alarm occurs, you need
to set up the absolute encoder.
1. Turn ON the power supply to the Servo Driver’s control circuit.
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Turn ON the power supply to the Servo Driver’s control circuit only. This will supply power to the
absolute encoder.
2. Replace the battery.
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Remove the old battery from the Servo Driver’s battery holder, and disconnect the connector to the
battery from the battery connector CN8.
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Place the new battery in the battery holder, and insert the connector correctly into battery connec-
tor CN8.
3. Turn the power supply OFF, then ON again.
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After correctly connecting the new battery, turn OFF the power supply to the Servo Driver, then
turn it ON again.
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If a Servo Driver alarm is not displayed, battery replacement is completed.
Note
If A.81 (backup error) is displayed, you need to set up the absolute encoder. Refer to
4-2-2
Absolute Encoder Setup and Battery Changes
, and perform the setup and make the initial
settings for the Motion Control Unit.
Troubleshooting
Chapter 5
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