It stops the movement of the axes and the spindle, eliminating all the enable signals and canceling all the analog outputs of the CNC. When detected from the position loop, it opens the position loop and sets the LOPEN mark to ·1·.

If it is in execution, it interrupts the execution of the part program of the CNC of its Besides this, it activates the external emergency output.

If any of the axes of the main channel has a.m.p. SMOTIME (P58) other than ·0·, even having FAGOR filters active with look-ahead (bit 15 of g.m.p. LOOKATYP=1), when programming G51, the FAGOR filters do not start working.