Code PRIO-165: CNET Connection Not Found
Issue Description & Safety Warning
The Fanuc R-30i Series Robot Controller has triggered a critical CNET Connection Not Found 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 interface could not establish a connection as it was not found. Remedy: Verify the scan-list configuration and match it with the target device. Verify the connection paths. The connection path expected by the scan- list can be found in the EDS file for the target device. The connection path supported by the target device can be found in its documentation. Verify that the target device and the EDS file used by the Scanner config match.
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 PRIO-165 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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