Code SDTL-051: Illegal group(Line %s)
Issue Description & Safety Warning
The Fanuc R-30i Series Robot Controller has triggered a critical Illegal group(Line %s) 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: Execution of X_DYNDAT causes this error. Wrong formatted data is found where group number should be specified. Remedy: Check displayed line of CSV file. String at which X_DYNDAT detected error is displayed, too. Check the string, data type and its data format.
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 SDTL-051 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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