310,320,316,326 apc alarms on nakamura tome 15 fanuc ot

getting 310,320,316,326 error codes x and z need zero and x and z battery zero changed batteries need help to clear codes .update made sure x and z were in between decell and overtravel shut screen off powered back on i changed pwe to 1 then changed parameter 21 from 00000011 to 00000000 then changed parameter 22 to 00000011 then changed pwe to 0 shut screen off then powered machine off turned both back on and now i can zero x and z and alarms are gone my new question do i need to switch parameters back to save or just run like it is .

if machine running good ,why need change backÉ