Min,max limit of AXIS using nontrivial kín.

The inihal pins cannot be linked or set in a halfile that is
specified by an inifile [HAL]HALFILE item because they are
not created until milltask is started. The inihal pin values
can be altered by independent halcmd programs specified by
[APPLICATION]APP items or by GUIs that support a
[HAL]POSTGUI_HALFILE.

The inihal pins are sampled in every task cycle, however,
 commands affected by their values typically use the value present
 at the time when the command is processed. Such commands include
 all codes handled by the interpreter (Gcode programs and MDI 
commands) and NML jogging commands issued by a GUI 
(including halui).

$ man milltask