Siemens SINUMERIK 840D sl Function Manual page 620

Detailed description
2.6 Block search Type 5 SERUPRO
Prefer or ignore REPOS
Further REPOS adaptations can be made by setting the bits in:
MD11470 $MN_REPOS_MODE_MASK
Bit 5 = 1
Bit 6 = 1
Bit 7 = 1
Delayed approach of axis with REPOS offset
With the axial level-triggered VDI signal, axis/spindle (PLC→NCK):
DB31, ... DBX10.0 (REPOSDELAY)
is traversed with the edge of IS:
DB21, ... DBX31.4 (REPOSMODEEDGE)
the REPOS offset for this axis is traversed only after the next time it is programmed.
Whether this axis is currently subject to a REPOS offset can be scanned via synchronized
actions with $AA_REPOS_DELAY.
Caution
The interface signal:
DB31, ... DBX10.0 (REPOSDELAY)
has no effect on machine axes that form a path.
You can determine whether an axis is a path axis via:
DB31, ... DBX76.4 (path axis)
.
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Modified feedrates and spindle speeds are valid immediately in the residual
block and are given priority. This behavior relates to every REPOS operation.
Neutral axes and positioning spindles are repositioned after SERUPRO.
Neutral axes that are not allowed to be further repositioned must receive
interface signal:
DB31, ... DBX10.0 (REPOSDELAY)
This cancels the REPOS movement.
The level of interface signal:
DB31, ... DBX10.0 (REPOSDELAY)
is read if REPOSA is interpreted.
Axes, which are neither geometry nor orientation axes, are then excluded by
REPOS and are not moved.
Note: REPOSDELAY is changed from edge to level evaluation.
Basic logic functions: Mode group, channel, program operation, reset response (K1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0