Siemens SINUMERIK 840D Operating Manual page 279

Parameter Description
V2 Retraction distance after each machining step – (only without compensating chuck,
chipbreaking and manual retraction)
Distance by which the drill is retracted for chipbreaking.
V2 = automatic: The tool is retracted by one revolution.
DT (only for G Dwell time at final drilling depth in seconds
code)
SR (only for G Spindle speed for retraction - (only for when a compensating chuck is not used)
code)
SDE (only for Direction of rotation after end of cycle:
G code)



Yes
Technology 
–
–
–
–
No

Behavior the same as it was before the cycle was called
Exact stop (only 
for technology,
G601: Block advance for exact stop fine

yes)
G602: Block advance for exact stop coarse

G603: Block advance if the setpoint has been reached

Behavior the same as it was before the cycle was called
Precontrol (only 
for technology,
FFWON: with precontrol

yes)
FFWOF: without precontrol

Behavior the same as it was before the cycle was called
Acceleration (only 
for technology,
SOFT: Jerk-limited (soft) acceleration of the axes

yes)
BRISK: Abrupt acceleration of the axes

DRIVE: Reduced axis acceleration

Speed controlled: Spindle for MCAL; speed controlled operation
Spindle (only for 
technology, yes)
Position controlled: Spindle for MCALL; position controlled operation

Milling
Operating Manual, 03/2010, 6FC5398-7CP20-1BA0
Exact stop
Precontrol
Acceleration
Spindle
Programming technological functions (cycles)
8.1 Drilling
Unit
mm
s
rev/min
279