Siemens SINUMERIK 840D sl Programming Manual page 70

Parameter description
2.3 Description of the most important defining parameters
Example of _KNUM=12003: D3 is correct, calculated as a radius offset, inverted (sign
inverted).
2. Specification _KNUM for zero offset:
● _KNUM=0:
● _KNUM=1... 99:
● _KNUM=1000:
● _KNUM=1011...1026:
● _KNUM=1051...1066:
● _KNUM=2000:
● _KNUM=9999:
The modified frame is only activated immediately in the cycle if _KNUM=9999, otherwise by
the user by writing G500, G54...G5xy.
Note
The remaining active frame chain must be retained.
With NCU-global frames, correction for rotation is not possible.
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No automatic ZO correction.
Automatic ZO correction in settable frame / NV G54...G57, G505...G599.
Automatic ZO correction in the last active channel basic frame according to MD 28081:
MM_NUM_BASE_FRAMES.
The offset is calculated to have the right effect when G500 is activated. The
corresponding basic frame must then also be active (relevant bit in $P_CHBFRMASK
must be set).
automatic ZO in 1st to 16th channel basic frame ($P_CHBFR[0]...$P_CHBFR[15]).
automatic ZO in 1st to 16th basic frame (NCU global) ($P_NCBFR[0]...$P_NCBFR[15])
automatic ZO in system frame (scratch system frame $P_SETFR).
automatic ZO in active frame:
– active settable frame G54...G57, G505...G599 or
– If G500 active: last active basic frame acc. to $P_CHBFRMASK (highest set bit).
Programming Manual, 03/2009 Edition, 6FC5398-4BP10-2BA0
Measuring cycles