Code CVIS-129: Unknown tag found in log file
Issue Description & Safety Warning
The Fanuc R-30i Series Robot Controller has triggered a critical Unknown tag found in log file 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: The log file is too new, and this version of the system cannot read it. Remedy: This error indicates there is no way to convert the file to use on this robot controller. To use this file, you will need to either find a controller with newer software, or reload this controller with newer software. If necessary, contact ytour local FANUC representative for updated robot software.
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 CVIS-129 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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