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ErrorLib — Industrial Fault Code Library

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290

Interface Switch Signal (DRC) Switched During Block Execution

Fanuc · Alpha i series AC Servo Motor

What does 290 mean?

The interface switch signal (DRC) was switched while a block was being executed. This unexpected change during an active operation can lead to system instability or incorrect behavior.

Common Causes

  • Interface switch signal (DRC) was toggled during an ongoing block execution.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Ensure the interface switch signal (DRC) is switched only after block execution has completely stopped.

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

000Power-Down Required Parameter011Zero Feedrate Specified013Maximum Feedrate Zero
Source: Fanuc Alpha i series AC Servo Motor
Open Manual (Page 223)Search more codes in this manual