The grid position could not be calculated during grid reference position return using the grid system as the one-revolution signal was not received before leaving the deceleration dog. This alarm is also generated when the tool does not reach a feedrate that exceeds the servo error amount preset to parameter No. 1841 before the deceleration limit switch is left (deceleration signal *DEC returns to “1”). Check parameter No. 1841 and pulse coder.
Check parameter No. 1841 & pulse coder.