Functions reserved according to DIN and ISG-extensions

D	Tool geometry compensation
E*	Feedrate at block end
F	Feedrate at block start
H	Technological information to PLC
L	Subroutine call (global)
L CYCLE	Cycle call
LL	Subroutine call (local)
N	Block number
P	Parameter calculation
R	Radius programming
S	Spindle speed
S.POS	Spindle position
T	Tool selection
/	Skipping of NC-blocks