290
Interface Switch Signal (DRC) Switched During Block Execution
Fanuc · αi 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
- 1
Ensure the interface switch signal (DRC) is switched only after block execution has completely stopped.
Verified technical data. Last updated: March 2026
Source: Fanuc αi series AC Servo Motor