Limitations And Constraints - Siemens SINUMERIK 840D sl Function Manual

Figure 5-11
Note
If the correction path has not been traversed in full and the NC/PLC interface signal DB31,
... DBX31.7 (reset synchronism correction) has not been reset, writing to variable
$AA_COUP_CORR[S<n>] will not have any effect.
5.5.12.7

Limitations and constraints

Several following spindles
If a leading spindle has several following spindles, each of these following spindles can be
processed with the axial NC/PLC interface signal DB31, ... DBX31.6 (track synchronism)
separately from one another.
Writing variable $AA_COUP_CORR
System variable $AA_COUP_CORR is only written from the part program or synchronized
actions when a generic machine coupling has been activated for the corresponding axis/
spindle at least once.
Special Functions
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
Time diagram for synchronizing and resetting synchronism correction
M3: Coupled axes
5.5 Generic coupling
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