Siemens SINUMERIK 840D sl Function Manual page 783

Supplementary conditions
Block change and alteration of axis status
A premature block change is not possible:
● during oscillation with partial infeed
● during handwheel operation
The axis for which a block change occurred within the braking ramp can only be
programmed in the following block in the same axis state.
When the axis state changes, e.g. to POS from SPOS, the last programmed end-of-motion
criterion FINEA, COARSEA, IPOENDA applies.
This also applies:
● if a positioning axis is changed to a path axis or
● if the program is waiting specifically for the end of the positioning movement
● if a velocity override is activated or deactivated.
Activation and deactivation
End-of-motion criterion IPOBRKA and precise time of activation.
For part program execution:
● The braking ramp end-of-motion criterion can be activated via the NC command
● The precise time of activation is defined in setting data
● IPOBRKA is deactivated when an axis end-of-motion criterion FINEA, COARSEA or
● The NC command ADISPOSA can be used to program the size of the tolerance window
For technology cycles:
● The braking ramp end-of-motion criterion can be activated via the synchronized action
● IPOBRKA is deactivated when the axis end-of-motion criterion FINEA, COARSEA or
● The size of the tolerance window for the braking ramp end-of-motion criterion can be
Extended Functions
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
The block-specific oscillation motion must remain active until the axis with partial infeed
has reached its end position.
The last set end-of-motion criterion applies.
(WAITP, M30, technology cycle end, preprocessing stop).
IPOBRKA.
SD43600 $SA_IPOBRAKE_BLOCK_EXCHANGE
IPOENDA is next programmed for the axis.
for the braking ramp end-of-motion criterion and this is defined by means of setting data
SD43610 $SA_ADISPOSA_VALUE[axis] :
IPOBRKA.
IPOENDA is next programmed for the axis in a synchronized action.
programmed via the synchronized action ADISPOSA.
Positioning Axes (P2)
11.6 Block change
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