Siemens SINUMERIK 828D Function Manual page 528

K1: Mode group, channel, program operation, reset response
9.8 Block search Type 5 SERUPRO
Delayed approach of axis with REPOS offset
With the axial level-triggered VDI signal axis/spindle (PLC → NCK):
DB31, ... DBX10.0 (REPOSDELAY)
with the edge of NST:
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.
Interface signal:
DB31, ... DBX10.0 (REPOSDELAY)
has no effect on machine axes that form a path.
Whether an axis is a path axis can be determined with:
DB31, ... DBX76.4 (path axis).
Acceptance timing of REPOS VDI signals
With the 0/1 edge of the channel-specific VDI signal (PLC → NCK):
DB21, ... DBX31.4 (REPOSMODEEDGE)
the level signals of:
DB21, ... DBX31.0-31.2 (REPOSPATHMODE0 till 2)
and
DB31, ... DBX10.0 (REPOSDELAY)
are transferred to the NC.
The levels relate to the current block in the main run. There are two different cases:
Case A:
One repositioning block of a currently active REPOS operation is contained in the main run.
The active REPOS operation is aborted, restarted and the REPOS offsets controlled via the signals:
DB21, ... DBX31.0-31.2 (REPOSPATHMODE0 till 2)
and
DB31, ... DBX10.0 (REPOSDELAY).
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CAUTION
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Basic Functions