Code MACR-012: Number of DI+RI is over
Issue Description & Safety Warning
The Fanuc R-30i Series Robot Controller has triggered a critical Number of DI+RI is over 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 number of RI+DI is over the maximum number. You can assign RI and DI to macro assign type, but the total number of assignments possible is restricted by the system variable $MACROMAXDRI. $MACROMAXDRI must be set to 5 and never be changed. When the total number of assignments is over $MACROMAXDRI, this alarm occurs. Remedy: First deassign the other RI or DI assignments. Then assign the new macro as RI or DI.
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 MACR-012 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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