Clears parameter array.
(arrclr,param,len)
(arrclr,3000,16) (arrchr,3000,PlanetCNC Rocks!) G17 G21 G90 G91.1 G94 G06.1 G06.2 H2 P3000 Q20 D1 Y5 ;Text from 3000, integrated font G06 X10
array, arrchr