Code SRVO-278: TP E-stop(SVEMG abnormal)
Issue Description & Safety Warning
The Fanuc R-30i Series Robot Controller has triggered a critical TP E-stop(SVEMG abnormal) 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 EMERGENCY STOP button on the Teach Pendant was pressed, but the EMERGENCY STOP line was not disconnected. Remedy: 1. Release the TP EMERGENCY STOP button, then the controller power cycle again. 2. When the TP EMERGENCY STOP button is pushed again, and this alarm occurs again, refer to the Controller Maintenance Manual for more information(SRVO-202). Note: 1. Cycle power to release this alarm. 2. This alarm might occur when the emergency stop button is pushed slowly. In this case, the above remedy 2 is unnecessary.
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 SRVO-278 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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