SRVO-065

Verify alarm details on teach pendant

Press MENU > ALARM > F1 [TYPE] > select 'SERVO' to view SRVO-065 details. Note which axis group is affected (typically displayed as 'Group: 1'). Record the current alarm time/date for maintenance logs.

Check MENU > ALARM > F2 [HIST] to see if BLAL has occurred before or has been intermittent, which indicates the battery has been marginal for some time.

Prepare replacement battery and tools

Obtain correct Fanuc pulse coder battery (typically A98L-0031-0025 for most R-30iA/R-30iB systems, or A06B-6114-K504 for some configurations). Have Phillips screwdriver ready. Verify new battery voltage is >3.0V with multimeter before installation.

DO NOT power off the controller until the new battery is installed. Powering off will cause immediate loss of all position data requiring complete mastering of all axes.

Replace battery while powered on

Locate battery box on robot base (typically J1 axis base cover). Remove cover screws and locate battery holder. Quickly disconnect old battery and connect new battery within 30 seconds to minimize risk. Ensure correct polarity (red=positive). Secure battery holder and replace cover.

Some robots have the battery in the controller cabinet instead of the robot base. Check maintenance manual for your specific model. Look for cable labeled 'BATTERY' or 'BATT' connected to the axis control board.

Battery replacement must be completed within 30 seconds. Have the new battery pre-positioned and ready before disconnecting the old one.

Clear alarm and verify resolution

After battery replacement, press RESET on teach pendant. The SRVO-065 alarm should clear immediately. Navigate to MENU > SYSTEM > Variables > $SCR.$BATTERY_ALARM to verify value is 0 (FALSE). If alarm persists, check battery connection.

The alarm will not auto-clear on some controller versions until the next power cycle, but the battery voltage is being monitored immediately.

Update maintenance records and schedule

Record battery replacement date in MENU > SYSTEM > Maintenance > Battery. Set next replacement reminder for 3 years. Update physical maintenance log with battery part number, date, and technician name. Dispose of old battery per local regulations.

Program a calendar reminder 6 months before the 3-year mark to order replacement batteries and schedule preventive replacement before the alarm occurs.

Review robot usage history

Check MENU > SYSTEM > Variables > $DUTY_TEMP to review power-on hours. Compare actual running time versus calendar time since last battery change. If robot has been in storage or powered off for >6 months with a battery >2 years old, premature failure is likely.

Access $PMC_CTIME system variable to see cumulative controller power-on time in minutes. Divide by 525,600 to get years of actual powered operation versus calendar age.

Replace battery immediately while powered on

Follow same replacement procedure as standard battery replacement. Use correct battery specification (A98L-0031-0025 or equivalent). Complete replacement within 30 seconds of disconnecting old battery to prevent position data loss.

Even if robot appears to be functioning normally, do not delay replacement. Battery voltage can drop rapidly once BLAL alarm appears, and unexpected power loss will require complete re-mastering.

Implement preventive power-up schedule

For robots in storage or infrequent use, establish schedule to power on controller at least once every 60 days for minimum 2 hours. This allows internal charging circuits to condition the battery and extends service life. Document power-up dates in maintenance log.

If robot will be in extended storage (>6 months), consider performing preventive battery replacement before storage begins, then implement the 60-day power-up schedule.

Verify alarm clears and monitor voltage

After replacement and alarm reset, monitor system for 24 hours. Check MENU > ALARM > F2 [HIST] to confirm no recurrence. Some controllers provide battery voltage monitoring via $SCR.$BATTERY_VOLT system variable (nominal >3.0V).

Set up automatic email alarm notification via MENU > SETUP > Host Comm > HTTP to receive advance warning of battery issues before critical failure occurs.

Inspect battery connector and wiring

With controller powered on, carefully inspect battery connector for corrosion, bent pins, or loose contacts. Check wiring from battery holder to axis control board for damage, pinching, or wear. Look for green/white corrosion on terminals indicating moisture exposure.

Perform inspection carefully without disconnecting battery while powered on. Disconnecting a good battery due to suspected connection issues will cause the exact problem you're trying to avoid.

Measure battery voltage at source and destination

Using multimeter, measure voltage at battery terminals (should be >3.0V). Then measure at connector on axis control board (A06B-6117/6127 series). If voltage drop exceeds 0.2V between points, connection resistance is excessive and connector cleaning or replacement is required.

Check connector CN1 or CN18 on the axis control board (location varies by model). Compare battery voltage at both ends of the cable to identify where voltage drop occurs.