Siemens SINUMERIK 840D sl Function Manual page 823

Programming
The parameters governing oscillation (see Chapter "Assigning Oscillation and Infeed Axis
OSCILL") must be defined before the movement block containing the assignment between
the infeed and oscillation axes (see ), the infeed definition (POSP) and the motion-
synchronous actions:
The oscillation axis is enabled via a WAITP [oscillation axis] (see MD30552
$MA_AUTO_GET_TYPE), allowing the oscillation parameters to be transferred, i.e. into the
setting data, simultaneously. The symbolic names, e.g. SA43700 $SA_REVERSE_POS1
can then be used to program the motion-synchronous actions.
Note
For motion-synchronous actions with $SA_REVERSE_POS values, the comparison values
at the time of interpretation are valid. If setting data is changed afterwards, this has no
effect.
For motion-synchronous actions with $AA_REVERSE_POS values, the comparison values
within the interpoltation are valid. This ensures a reaction to the modified reversal positions.
● Motion-synchronous conditions WHEN, WHENEVER
● Activation through motion block
The following sections present those elements which have not yet been dealt with.
Some examples are described in the chapter "Examples".
Note
If the condition with which the motion-synchronous action (WHEN and WHENEVER) has
been defined is no longer valid, the OVERRIDE for this condition is automatically set to
100% if the OVERRIDE had been set to 0% before.
Main run evaluation
It is possible to compare the synchronization conditions in the interpolation cycle in the main
run with the current actual values ($$ variable on the right of comparison conditions). With
normal system variable comparison, the expressions are evaluated in the first run. The
complete extended possibilities for synchronized actions are listed in the following
documentation:
References:
/FBSY/ Function Manual, Synchronized Actions
Extended Functions
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
– Assign oscillation axis and infeed axes to one another OSCILL
– Specify infeed response POSP.
P5: Oscillation - only 840D sl
12.3 Oscillation controlled by synchronized actions
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