7-127 2. Absolute systemSupplement Battery (for Backup) InstallationFirst Installation of the BatteryAfter installing and connecting the back-up battery to the motor, execute an absolute en-coder setup. Refer to P.7-16, "Setup (initialization) of Absolute Encoder ".It is recommended to perform ON/OFF action once a day after installing the battery forrefreshing the battery.A battery error might occur due to voltage delay of the battery if you fail to carry out thebattery refreshment.Caution Use the following battery for absolute encoder.Battery .............Part No. : DV0P2990 (3.6V 2000mAh)Battery box ......Part No. : DV0P4430Replacement of the BatteryCautionIt is necessary to replace the battery for absolute encoder when battery alarm occurs.Replace while turning on the control power. Data stored in the encoder might belost when you replace the battery while the control power of the driver is off.After replacing the battery, clear the battery alarm. Refer to P.7-25, "How to Clear theBattery Alarm".When you execute the absolute encoder with the front panel (refer to P.2-79 of Prepara-tion), or via communication (refer to P.7-54), all of error and multi-turn data will be clearedtogether with alarm, and you are required to execute “Setup (Initialization) of absoluteencoder” (refer to P.7-16).How to Replace the BatteryCN601Pull out after 5 min.connection Raise the latch andtake off the cover.1) Refresh the new battery.Connector with lead wire of thebattery to CN601 and leave of 5 min.Pull out the connector from CN601 5min after.2) Take off the cover of the battery box.Related page • P.7-89 “Battery For Absolute Encoder”