Dwell Time (G4) - Siemens SINUMERIK 840D sl Programming Manual

2.14.7

Dwell time (G4)

With the command G4, a time (dwell time) is programmed in a block that expires as soon as the
block is executed in the main run. The block change to the following block is performed as soon
as the time has completely expired.
Note
G4 interrupts continuous-path mode.
Syntax
G4 F<Time>
G4 S<NumSpi>
G4 S<n> = <NumSpi>
Meaning
G4:
F<Time>:
S<NumSpi>:
S<n>=NumSpi>:
Note
The addresses F and S used for the time specified in the dwell block G4 do not influence the
feedrates F... and the spindle speeds S... of the program.
Supplementary conditions
Synchronized actions
Two synchronized actions are programmed in one program in such a way that the following
block with the dwell time becomes the action block in which the synchronized actions are
performed. One synchronized action is a modal synchronized action. The other synchronized
action is a non-modal synchronized action. If the non-modal synchronized action is intended to
influence the model synchronized action, e.g. release it for execution with UNLOCK, at least
two interpolation cycles e.g. G4 F<interpolator_cycle * 2> must be provided as the
effective dwell time.
NC programming
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
Activate dwell time
Alone in the Yes
block:
The dwell time <Time> in seconds is specified at address F.
The dwell time is programmed at address S in spindle revolutions <NumSpi> with
reference to the current main spindle.
The dwell time is programmed at address S in spindle revolutions <NumSpi> with
reference to the spindle addressed with the address extension <n>.
Fundamentals
2.14 Supplementary commands
367