Siemens SINUMERIK 840C Installation Instructions Manual page 377

6 NC Machine Data (NC MD), NC Setting Data (NC SD)
6.7.1 Axis-specific MD bits 2 (axial bits 2)
NC MD
1848*
The bits below apply to following axes only and are active immediately.
Bit 7 Bit 7=1 The synchronization path of following rotary axes is limited to 1
Bit 7=0 The synchronous position of following rotary axes is limited to 1 revolution .
Note:
If bit 4 is set in MD 1856*/531*, synchronization must never be performed when the tool or
wheel are in use.
Bit 6 Bit 6=1 Block change of a block with position-related switch on/off (G402/G400) is
Bit 6=0 Block change of a block with position-related switch on/off (G402/G400) is
Bit 5
Bit 5=1 On-the-fly synchronization with G403: Block change only after the
Bit 5=0 Block change immediately, i.e., as soon as synchronization is triggered.
Bit 4
Bit 4=1 Overlaid movements of the following axis are within the indexing grid.
Bit 4=0 Indexing grid ignored for overlay movements of the following axis.
6–192
More user manuals on
7 6 5
Synchroni- Block
Block change
zation in change
after position
tooth pitch when
reached (as
(as from synchroniz.
from SW 5)
SW 6) achieved
revolution/denominator of the 1st GI link ratio. The synchronous position is
approached along the shortest path or by deceleration, depending on the
setting in MD 1856*, bit 4.
Above half the maximum speed the synchronous position is reached by
deceleration, below half the maximum speed, along the shortest path.
delayed until the switch on/off position is reached.
performed immediately.
Block change after synchronization (with on-the-fly synchronization)
synchronous position has been reached (see also PLC signal,
"Synchronous position reached").
Synchronization does not start if PLC signal "Disable LINK ON" is active.
Division-related following axis overlay
However, any movements of the following axis caused by the leading axis
are not used to determine the set indexing position. Link and
synchronization function as before.
The following axis must be defined as an indexing axis for this function to
work. The indexing grid is defined in MD 1104* and MD 1108*.
ManualsBase.com
Bit No.
4 3 2
Block
Division- Suppres-
change with
related FA sion of
synchro-
overlay accel. limit.
nism fine
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SINUMERIK 840C (IA)