Battery alarm signal

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This signal indicates a low battery condition for the Fanuc i Series CNC, typically affecting the SRAM or pulse coder backup. Loss of battery power can result in the loss of critical parameters, programs, and absolute position data.

• Depleted or low voltage battery for memory or absolute pulse coder backup.
• Prolonged power-off state causing the battery to discharge.
• Poor or corroded battery connections.
• Faulty battery holder or charging circuit (if applicable).

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1. 1

   Measure the battery voltage; replace the battery if it falls below the specified threshold, typically 3V for a 3.6V battery.

2. 2

   Replace the battery with a new one of the correct type (e.g., A02B-0236-K102 or equivalent) while the Fanuc i Series CNC is powered ON to prevent data loss.

3. 3

   Inspect battery terminals and connections for corrosion, looseness, or damage.

4. 4

   After replacement, verify that the alarm clears and check for data integrity and correct absolute position settings if an absolute pulse coder is used.