Siemens SINUMERIK 840D sl Function Manual page 356

Detailed Description
2.1 General functionality
REPOS display Offset
Once the search target has been found, for each axis of the FXS-state prevailing on the
machine through the axis VDI-signals:
NST DB31, ... DBX62.4 ("Activate travel to fixed stop").
and
NST DB31, ... DBX62.5 ("Fixed stop reached")
displayed.
Example:
If the machine is at the fixed stop, and the block search has reached a block after
deselection of FXS , the new target position is displayed via NST DB31, ... DBX62.5 ("Fixed
stop reached") as REPOS offset.
FXS fully automatically in REPOS
With REPOS the functionality of FXS is repeated automatically and designated FXS-REPOS
below. This sequence is comparable to the program "fxsSeruproAsup.mpf." Every axis is
taken into account and the torque last programmed before the search target is applied.
The user can treat FXS separately in a SERUPRO-ASUP.
The following then applies:
Every FXS action executed in SERUPRO-ASUP automatically takes care of
$AA_FXS[X] == $VA_FXS[X].
This deactivates FXS-REPOS for axis X.
Deactivate FXS REPOS
FXS-REPOS is deactivated by:
• an FXS synchronous action which refers to REPOSA
• $AA_FXS[X] == $VA_FXS[X] in SERUPRO_ASUP.
Note
A SERUPRO-ASUP without FXS handling or no SERUPRO-ASUP results in fully
automatic FXS-REPOS.
Caution
FXS-REPOS moves all path axes in a path grouping to the target position. Axes with and
without FXS treatment thus traverse together with the G code and feedrate valid at the
time the target block is processed. As a result, the fixed stop may be approached in rapid
traverse(G0) or higher velocity.
20
Or
Basic logic functions: Travel to fixed stop (F1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0