Siemens SINUMERIK 840D sl Programming Manual page 304

Fundamentals
2.11 Path action
● Smoothing is not parameterized.
This occurs when:
– for G641 in G0 blocks, ADISPOS=0 (preassignment!).
– for G641 in non G0 blocks, ADISPOS=0 (preassignment!).
– for G641, for transition from G0 to non-G0 or non-G0 to G0, the lower of the values from
– for G642/G643, all axis-specific tolerances are zero.
● The block does not contain traversing motion (zero block).
This occurs when:
– Synchronized actions are active.
– Zero blocks are generated by program jumps.
Continuous-path mode in rapid traverse G0
Also for rapid traverse motion, one of the listed functions G60/G9 or G64 - respectively G641 -
G645 - must be specified. Otherwise, the default in the machine data is used.
304
ADISPOS and ADIS applies.
Normally, the Interpreter eliminates zero blocks. However, if synchronized actions are
active, this zero block is included and also executed. In so doing, an exact stop is initiated
corresponding to the active programming. This allows the synchronized action to also
switch.
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
NC programming