Siemens SINUMERIK 840D Operating Manual page 316

Programming technological functions (cycles)
8.2 Milling
Procedure
Parameters, G code program
PL Machining plane
Milling direction
RP Retraction plane
SC Safety clearance
F Feedrate
Parameters Description
Reference point Position of the reference point:
(lefthand edge)

(center)

(righthand edge)

∇ (roughing)
Machining 
∇∇ (pre-finishing)

∇∇∇ (finishing)

∇∇∇ base (base finishing)

∇∇∇ edge (edge finishing)

Chamfering

Vortex milling
Technology 
The milling cutter performs circular motions along the length of the slot and back
again.
Plunge cutting

Sequential drilling motion along the tool axis.
Milling direction: - (except plunge cutting).
Climbing

Conventional

316
1. The part program or ShopMill program to be processed has been
created and you are in the editor.
2. Press the "Milling" softkey.
3. Press the "Slot" and "Open slot" softkeys.
The "Open slot" input window opens.
mm
mm
mm/min
Parameters, ShopMill program
T Tool name
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
rpm
m/min
Unit
Milling