Code ISD-051: Velocity command excessive (IPS%d)
Issue Description & Safety Warning
The Fanuc R-30i Series Robot Controller has triggered a critical Velocity command excessive (IPS%d) 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 commanded velocity for the indicated pneumatic servo axis is too high. Remedy: The commanded velocity is limited to $IPS_CONFIG[n].$CMDSPD_MIN or $IPS_CONFIG[n].$CMDSPD_MAX, where n is the number specified in the alarm. Modify your application instruction or data to reduce the velocity demand on the pneumatic servo axis.
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 ISD-051 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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