224

Reference Position Not Established (ZRTN=0)

Fanuc · αi series AC Servo Motor

What does 224 mean?

The reference position has not yet been established. This condition specifically occurs when the ZRTN bit of parameter No.001 is set to 0, preventing the system from confirming its home position.

Common Causes

  • Reference position not yet established.
  • ZRTN bit of parameter No.001 is set to 0.

Repair Steps

  1. 1

    Set the reference position using the appropriate procedure.

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Verified technical data. Last updated: March 2026
Source: Fanuc αi series AC Servo Motor