Siemens SINUMERIK 840D sl Programming Manual page 150

Feed control
7.10 Several feedrate values in one block (F, ST, SR, FMA, STA, SRA)
Examples
Example 1: Path motion
Program code
F7=1000
F2=20
ST=1
SR=0.5
Example 2: Axial motion
Program code
FMA[3,x]=1000
Example 3: Multiple operations in one block
Program code
N20 T1 D1 F500 G0 X100
N25 G1 X105 F=20 F7=5 F3=2.5 F2=0.5 ST=1.5 SR=0.5
...
150
Comment
; 7 corresponds to input bit 7
; 2 corresponds to input bit 2
; Dwell time (s) input bit 1
; Return path (mm) input bit 0
Comment
; Axial feedrate with the value 1,000 for X axis, 3
corresponds to input bit 3.
Programming Manual, 09/2011, 6FC5398-1BP40-2BA0
Comment
; Initial setting
; Normal feedrate with
F, roughing with F7,
finishing with F3,
smooth-finishing with
F2, dwell time 1.5 s,
return path 0.5 mm
Fundamentals