EL
ErrorLib
Brands
||
  1. Home
  2. Fanuc
  3. R-30iB Mate + Mate Plus Robot
  4. COMMON LED Blink (1:1 High Speed)
About·Privacy·Terms

ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

COMMON LED Blink (1:1 High Speed)

Communication Halted by Alarm

Fanuc · R-30iB Mate + Mate Plus Robot

What does COMMON LED Blink (1:1 High Speed) mean?

The Common LED blinks rapidly (0.25s ON / 0.25s OFF), indicating that communication is halted due to an active alarm condition. Further investigation of other alarm indicators is required to pinpoint the specific cause.

Common Causes

  • Communication has been halted by an active alarm condition, affecting high-speed data transfer.
  • A critical alarm within the system has caused the communication bus to stop transmitting data to prevent further issues or data corruption.
  • This could be a safety-related alarm, a severe hardware fault, or a critical error that necessitates a communication halt.
  • The system prioritizes resolving the underlying alarm before resuming normal communication.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Identify the cause of the alarm according to the states of the red ALM LED or information displayed on the CNC screen.

Browse all codes in this manual (53)
Verified technical data. Last updated: April 2026

Related Faults

24EXTEmergency Stop Circuit 24V Fault24TTeach Pendant 24V FaultALM LED Blink (1:1)Broken Wire or Noise (Subsequent Unit)
Source: Fanuc R-30iB Mate + Mate Plus Robot
Open Manual (Page 134)Search more codes in this manual