Limitations And Constraints - Siemens SINUMERIK 840D Function Manual

Mc axes and spindles

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Figure 14-13

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.

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.

Axes and spindles

Function Manual, 06/2019, A5E47437747B AA

Time diagram for synchronizing and resetting synchronism correction

M3: Coupled axes

14.5 Generic coupling

Sinumerik 840d sl