Code DNET-026: No match on dev type look-up
Issue Description & Safety Warning
The Fanuc R-30i Series Robot Controller has triggered a critical No match on dev type look-up 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 system cannot find the specified device type in its list of defined device types. Remedy: Check the selected device type on the Device List. Next, check the Defined Device List and the Standard Device Definition List for the required device type. If it does not appear, go to the Defined Device List and add the required device definition, then select it on the Device List screen. When you have finished, turn off then turn on the controller.
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 DNET-026 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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