Code SVGN-274: Too low speed threshold.
Issue Description & Safety Warning
The Fanuc R-30i Series Robot Controller has triggered a critical Too low speed threshold. 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: Threshold to detect panel contact became unexpectedly-low. Remedy: If gun tip contacted panel surface at start position, confirm that no obstruction exists between guntip and panel. If obstruction exists, remove it and retry spot program touchup or avoid it and touch up correct position using jog or point touchup(not program touchup). If robot tip contacted lower panel surface at start position, increase start distance(SD) for robot tip and/or lower panel detection distance. Refer to Chapter “20.6 LOWER PANEL DETECTION DISTANCE CLAMP” or “20.13 SPTCH_RSD INSTRUCTION” in operator’s manual for Servo Gun Function for more information about the lower panel detection distance. Retry spot program touchup. If this problem persists after taking the above actions, perform the following actions: 1. Acquire the diagnostic data. See the procedure for diagnostic data collection at Chapter “20.19 Troubleshooting” in operator’s manual for Servo Gun Function.. 2. Contact your local FANUC representative.
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 SVGN-274 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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