Code SRVO-062: BZAL alarm(Group:%d Axis:%d)
Issue Description & Safety Warning
The Fanuc R-30i Series Robot Controller has triggered a critical BZAL alarm(Group:%d Axis:%d) alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
Cause: This alarm is issued when the battery for backing up the absolute position data of the pulse coder is not connected or is empty. The battery cable inside the robot might have become disconnected. Remedy: Correct the cause of the alarm, then turn on the power again after doing PULSE RESET operation. Mastering is required. There are the following two methods for PULSE RESET. z Method 1: Move the cursor to $MCR.$SPC_RESET on the system variable screen, and select F4 TRUE. It becomes TRUE momentarily, it writes in FALSE at once. Then push the reset button. z Method 2: F3 RES_PCA is pushed on the MASTER/CAL screen, and select F4 YES. Then press the alarm release button. Note) The MASTER/CAL screen is not usually displayed.
Source: FANUC Robot R-30iA Alarm Code List Operator's Manual
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Fanuc R-30i Series Robot Controller Alarms
Fanuc controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code SRVO-062 on the R-30i Series Robot Controller identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Fanuc's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 6553 Fanuc R-30i Series Robot Controller codes.
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