Code SVGN-178: Open/CloseLim=%s
Issue Description & Safety Warning
The Fanuc R-30i Series Robot Controller has triggered a critical Open/CloseLim=%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 is information of standard stroke limit. Remedy: Gun stroke limit is compensated by tip wear down. The standard value is stroke limit when TW_SETUP or WR_SETUP is performed an original value. This shorter standard stroke limit may cause pressure shortage. If the standard stroke limit is shorter than original value, set correct standard limit in servo gun setup screen.
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-178 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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