Mitsubishi Electric 600M Series Error PR0121: In F0 arc modal mode

CNC milling machine · taken from the manufacturer’s manual, pages cited

Error codePR0121

A rapid traverse command (F0) was issued during a circular interpolation, which is invalid in this mode. The manual's first action is: “Rapid traverse cannot be commanded and so any F1-digit command except F0 should be designated for the circular interpolation command.”

Model
Mitsubishi Electric 600M Series
Display shows
In F0 arc modal mode (PR0121)
Type
Error code
Source
Manual p. 480

What PR0121 means

In F0 arc modal mode p. 480

Common causes

  • The F0 command (F1-digit rapid traverse command) has issued when the circular interpolation command (G02, G03) was issued during the F1-digit feed command. p. 480

What to do

  1. Rapid traverse cannot be commanded and so any F1-digit command except F0 should be designated for the circular interpolation command. p. 480
  2. Issue the G0 or G1 command unless the block which caused the alarm is the circular command block. p. 480

Before you service the product, read the safety instructions in the manual p. 4.

If PR0121 is still not resolved

  • contact service / dealer p. 5
    “Do not change the fixed cycle program without prior consent from the machine manufacturer.”
  • contact service / dealer p. 5
    “Do not turn OFF the NC a”
Open the manual at page 480 All 600M Series error codes Manual details & download

This page summarises what the manufacturer’s manual says about PR0121; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Mitsubishi Electric. Found a mistake? Report an error.