Siemens SINUMERIK 840D sl Programming Manual page 71

Start up
The following must be set during installation (default setting):
● MD 28082: MM_SYSTEM_FRAME_MASK,
● Additionally the MDs for the required basic frames
AUTOMATIC mode
In the measuring cycles in AUTOMATIC mode the offset for the default setting is corrected
additively with fine offset (if MD 18600: MM_FRAME_FINE_TRANS=1).
Otherwise (when MD 18600=0), or in CYCLE961, or when _KNUM=2000, or when
"measuring in JOG" is active, the offset is implemented in the coarse offset. Any existing fine
offset is included in the calculation and then deleted.
When measuring workpieces with ZO (offset in CYCLE974, CYCLE977, CYCLE978,
CYCLE979, CYCLE997) in AUTOMATIC mode, values can be written either to the coarse or
fine offset:
_CHBIT[21]:
0:
1:
Note
If _KNUM=2000 (scratch system frame $P_SETFR), the offset value is always written to the
coarse offset.
Measuring cycles
Programming Manual, 03/2009 Edition, 6FC5398-4BP10-2BA0
– Bit 5=1 (system frame for cycles)
– and bit 0=1 (system frame for scratching), recommended
Note
Regarding 1)
If bit 0 = 0, then corrections cannot be made in the basic frame in "Measuring in JOG"
and the parameterization variant KNUM=2000 cannot be used when measuring in
automatic mode!
ZO translation additive in FINE
ZO translation into COARSE, FINE =0 When undertaking offset in the coarse offset,
an existing fine offset is included in the offset value and the fine offset deleted.
2.3 Description of the most important defining parameters
Parameter description
1)
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