Siemens SINUMERIK 840D Function Manual page 205

Figure 6-1
Note
Continuous path mode
Continuous path mode across block limits (G64) is only possible if the positioning axes reach
their end-of-motion criterion before the path axes (in the diagram above, this is not the case).
Type 2: Modal positioning axis (across blocks)
Properties:
● The block change is performed as soon as all path axes have reached their programmed
end-of-motion criterion (G601, G602, G603)
● Programming the positioning axis: POSA[<axis>]
● The positioning axis traverses beyond the block limits to its programmed end position. It is
not permissible that the positioning axis is programmed again before reaching its end-of-
motion criterion.
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
Block change for path axis and positioning axis type 1
P2: Positioning axes
6.6 Block change
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