Siemens SINUMERIK 840D sl Programming Manual page 29

Note
R parameters can also be considered 1-dimensional arrays with abbreviated notation
(R10 is equivalent to R[10]).
Example: Indirect G code programming
Settable zero offset G code group 8
N1010 DEF INT INT_VAR
N1020 INT_VAR = 2
...
N1090 G[8] = INT_VAR G1 X0 Y0
N1100 INT_VAR = INT_VAR + 1
N1110 G[8] = INT_VAR G1 X0 Y0
Plane selection G code group 6
N2010 R10 = $P_GG[6]
...
N2090 G[6] = R10
Job planning
Programming Manual, 03/2006 Edition, 6FC5398-2BP10-1BA0
; G54
; G code calculation
; G55
; Read G code for current plane
; G17
Flexible NC programming
1.4 Indirect programming
1-15