Code DNET-103: Invalid board baud rate
Issue Description & Safety Warning
The Fanuc R-30i Series Robot Controller has triggered a critical Invalid board baud rate 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 board's baud rate is not one of: 125 KB, 250 KB, or 500 KB. Remedy: Check the Board Detail screen to see if the board's baud rate is one of the above values. If it is not, change the baud rate to a valid value and press RESET on the teach pendant. If the baud rate appears valid, cold start the controller. If the problem persists, document the events that led to the error and call 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 DNET-103 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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