Siemens sinumerik 840D sl Operating Manual page 256

Programming technology functions (cycles)
8.1 Drilling
Procedure
Parameters, G code program
PL Machining plane
RP Retraction plane
SC Safety clearance
F Feedrate
Parameters Description
Single position
Machining 
position (only
Drill hole at programmed position
for G code)
Position pattern

Position with MCALL
Z0 (only for G Reference point Z
code)
FR Feedrate during retraction
Face C
Machining 
surface
Face Y

(only for
Peripheral surface C

ShopTurn)
Peripheral surface Y

Please note that when machining in the face C and peripheral surface C planes,
clamping only remains active for the drilling operation. On the other hand, when
machining in the face Y and peripheral surface Y planes, clamping is modal, i.e. it
remains active until the machining plane is changed.
Z1 Drilling depth (abs) or drilling depth in relation to Z0 (inc)
(only for G code) It is inserted into the workpiece until it reaches Z1. - (for tip centering only)
Z1 (face) or Drilling depth (abs) or drilling depth in relation to Z0 of X0 (inc)
X1 (peripheral
The tool is inserted until Z1 or X1 is reached. - (for tip centering only)
surface)
(only for
ShopTurn)
Dwell time (at final drilling depth) in seconds
DT 
Dwell time (at final drilling depth) in revolutions

256
1. The part program or ShopTurn program to be processed has been
created and you are in the editor.
2. Press the "Drilling" softkey.
3. Press the "Drilling Reaming" softkey.
4. Press the "Reaming" softkey.
The "Reaming" input window opens.
mm
mm
mm/min
Parameters, ShopTurn program
T Tool name
D Cutting edge number
F Feedrate
S / V Spindle speed or constant
cutting rate
Operating Manual, 07/2010, 6FC5398-8CP40-0BA0
mm/min
mm/rev
rpm
m/min
Unit
mm
mm/min
mm
mm
s
rev
Turning