Code SDTL-078: Payload inertia is out of range (%s)
Issue Description & Safety Warning
The Fanuc R-30i Series Robot Controller has triggered a critical Payload inertia is out of range (%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: This alarm is displayed by execution of KAREL program, STPAYLOD. Inertia of payload is out of range. It is specified by register. %s shows followings. - X, Y or Z - Index of register that is used to specify inertia. - Specified value by the register. 4.ERROR CODES B-83124EN-6/02 Suppose the 3rd argument of STPAYLOD is 101. Inertia of payload about X axis is specified by R [105]. If its value is -20.5, SDTL-078 is displayed as “Payload inertia is out of range (X, 105, -20.500)” Remedy: Check index of register and value of the register. Set proper value.
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-078 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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