Siemens SINUMERIK 840D Operating Manual page 352

Programming technological functions (cycles)
8.3 Contour milling
Parameters, G code program
PRG Name of the program to be generated
PL Machining plane
Milling direction 

RP Retraction plane
SC Safety clearance
F Feedrate
Parameter Description
Machining The following machining operations can be selected:
∇ (roughing)

∇∇∇ base (base finishing)

∇∇∇ edge (edge finishing)

Chamfering

Z0 Reference point Z
Z1 Pocket depth (abs) or depth relative to Z0 (inc)
- (only for ∇, ∇∇∇ base or ∇∇∇ edge)
Maximum plane infeed
DXY 
Maximum plane infeed as a percentage of the milling cutter diameter

- (only for ∇ and ∇∇∇ base)
DZ Maximum depth infeed – (only for ∇ or ∇∇∇ edge)
UXY Plane finishing allowance – (only for ∇, ∇∇∇ base or ∇∇∇ edge)
UZ Depth finishing allowance – (only for ∇ or ∇∇∇ base)
Lift mode Lift mode before new infeed
If the machining operation requires several points of insertion, the retraction height can
be programmed:
to RP

Z0 + safety clearance

When making the transition to the next insertion point, the tool returns to this height. If
there are no elements larger than Z0 (X0) in the pocket area, then Z0 (X0) + safety
clearance can be programmed as the lift mode.
FS Chamfer width for chamfering - (only for chamfering machining)
ZFS Insertion depth of tool tip (abs or inc) - (for machining only)
352
Climbing
Conventional
mm
mm
mm/min
Parameters, ShopMill program
T Tool name
F Feedrate
D Cutting edge number
F Feedrate
S / V Spindle speed or constant
cutting rate
Operating Manual, 03/2010, 6FC5398-7CP20-1BA0
mm/min
mm/rev
D
mm/min
mm/rev
rpm
m/min
Unit
mm
mm
mm
%
mm
mm
mm
mm
mm
mm
mm
mm
Milling