[Cause]
The current positions of the master and slave axes differ greatly. This alarm occurs when the absolute value of $DUAL_DRIVE[i].$POS_GAP[n] exceeds $DUAL_DRIVE[i].$POS_GAPTOL[n]. (i: group number, j: master axis number, n: dual-drive pair number)
[Countermeasure]
Check the mechanical unit for problems. Alternatively, if $DUAL_DRIVE[i].$POS_GAPTOL[n] is too small, readjust it to an appropriate value.