Siemens SINUMERIK 840D sl Function Manual page 844

Oscillation (P5)
Asynchronous oscillation
Reset
The oscillation movement is interrupted and deselected with a braking ramp. The options
selected subsequently are not processed (sparking-out strokes, end point approach).
Working area limitation, limit switches
If it is detected during preprocessing that the oscillation movement would violate an active
limitation, then an alarm is output and the oscillation movement not started. If the oscillation
axis violates a limitation which has been activated in the meantime (e.g. 2nd software limit
switch), then the axis is decelerated down along a ramp and an alarm output.
Protection zones are not effective!
Follow-up mode
There is no difference to positioning axes.
End of program
If the axis is not controlled by the PLC, then the program end is not reached until the
oscillation movement is terminated (reaction as for POSA:
Positioning across block boundaries).
If the axis is controlled by the PLC, then it continues to oscillate after program end.
Mode change
The following table shows the operating modes in which oscillation can be implemented.
Changeover to an operating mode which allows oscillation does not affect the oscillation
movement. Changeover to inadmissible operating modes is rejected with an alarm. It is not
possible to traverse an axis in oscillation mode while applying control commands from the
NC program or via operator inputs (JOG) simultaneously; an alarm is output if this is
attempted. The following applies: The type of movement first started has priority.
Table 12- 4
Operating mode
AUTO
MDA
MDA Repos
MDA Teachin
MDA Ref
JOG
JOG Ref
JOG Repos
844
CAUTION
Operating modes which allow oscillation
Allows oscillation
Yes
Yes
Yes
Yes
No
Yes
No
Yes
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Extended Functions