External Oscillation Reversal - Siemens SINUMERIK 840D sl Function Manual

Oscillation (P5)
12.3 Oscillation controlled by synchronized actions
Programming
POSP[infeed axis] = (end position, part section, mode)
End position: End position for the infeed axis after all partial infeeds have been traversed.
Part section: Part infeed at reversal point/reversal point range
Mode 0: For the last two part steps, the remaining path up to the target point is divided into
two equally large residual steps (default setting).
Mode 1: The part length is adjusted such that the total of all calculated part lengths
corresponds exactly to the path up to the target point.
12.3.9

External oscillation reversal

For example, keys on the PLC can be used to change the oscillation area or instantaneously
reverse the direction of oscillation.
The current oscillation motion is braked and the axis then traversed in the opposite direction
in response to the edge-triggered PLC input signal Oscillation reversal (DB31 DBB28 bit0).
The braking operation is checked back via PLC output signal Oscillation reversal active
(DB31 DBB100 bit 2).
The braking position of the axis can be accepted as the new reversal position by means of
PLC signal Change reversal position (DB31 DBB28 Bit4).
The PLC input signal Select reversal position (DB31 DBB28 bit 3) is ignored provided that
the change is made in relation to the last issued
No change in the reversal points applied via handwheel or JOG keys may be active for the
relevant axis. If handwheel or JOG key changes are currently active, display alarm 20081
(Braking position cannot be accepted as reversal position - handwheel active) will be
generated. The alarm is automatically reset when the conflict has been eliminated.
Hold time
No stop time is applied for a change of direction due to an
axis waits for the exact stop fine signal. Any configured exact stop condition is fulfilled.
Infeed motion
With non-modal oscillation, no infeed movement is performed for a change of direction due
to an
consequently the appropriate synchronized action is not fulfilled.
System variables
The braking position can be scanned via system variable $AA_OSCILL_BREAK_POS1,
when approach to reversal position 1 is aborted or via
$AA_OSCILL_BREAK_POS2 when approach to reversal position 2 is aborted.
If the relevant reversal point is approached again, the position of the reversal point can be
scanned in $AA_OSCILL_BREAK_POS1 or $AA_OSCILL_BREAK_POS2.
822
external oscillation reversal
External oscillation reversal
as the reversal position has not been reached and
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
command.
external oscillation reversal
Extended Functions
. The