Siemens SINUMERIK 840D sl Function Manual page 809

Without PLC control
If the PLC does not have control over the axis, then the axis is treated like a normal
positioning axis (POSA) during asynchronous oscillation.
Delete distance-to-go
Channel-specific delete distance-to-go is ignored. Axial delete distance-to-go:
Without PLC control
If the oscillation axis is not under PLC control, it is stopped by means of a braking ramp.
With PLC control
In this case, deceleration is suppressed and must be initiated by the PLC.
The following applies to both cases: After the axis has been stopped, the appropriate
reversal point is approached (see OSCILL_CONTROL_MASK, Chapter 4) and the distance-
to-go deleted. The sparking-out strokes are then executed and the end position is
approached if this has been set as such in OSCILL_CONTROL_MASK.
The oscillation movement is then finished.
Note
During grinding, the calipers can be put into action via axial delete distance-to-go.
EMERGENCY STOP
In the event of an EMERGENCY STOP, the axis is decelerated by the servo (by cancellation of
servo enable and follow-up). The oscillation movement is thus terminated and must be
restarted if necessary.
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!
Extended Functions
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
CAUTION
Oscillation (P5)
12.2 Asynchronous oscillation
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