Siemens SINAMICS S120 Function Manual page 457

DDS
Mechanical relationships
p2504/p2505/p2506/
p2503
A, B, C and D designate
different mechanical rela‐
tionships.
Load gear position tracking Activa‐
Table 9-5 DDS changeover response
DDS Changeover response
0 ‑
1 Changeover during pulse inhibit or operation has no effect
2 Encoder adjustment and referencing bit are reset. Position tracking for EDS0 is no longer calculated and must be
re-adjusted when switching back to DDS0.
3 Position tracking for EDS0 is continued and the referencing bit is reset.
4 Pulse inhibit/operation: Position tracking for EDS0 is continued and the referencing bit is reset.
5 Position tracking for EDS4 is newly initiated and the referencing bit is reset.
same applies to EDS0.
6 Position tracking for EDS5 is newly initiated and the referencing bit is reset.
same applies for EDS0.
7 MDS changeover alone during pulse inhibit or operation has no effect
8 Pulse inhibit/operation: Referencing bit is reset.
consequence, the actual position value also changes (the offset correction of the position tracking is canceled).
When switching back to DDS0, the position tracking for EDS0 is newly initiated and the referencing bit is reset.
only makes sense to switch back to DDS0 without a new adjustment in DDS0 if the user did not make a new
adjustment in DDS8 and the permissible tolerance window (p2722) was not exited.
9 Pulse inhibit/operation: Position tracking for EDS6 is newly initiated and the referencing bit is reset.
switching back to DDS0, the same applies to EDS0.
The referencing bit (r2684.11) is reset for a DDS changeover. If, in the new DDS, the EDS already has an adjusted encoder,
1)
then the referencing bit is set again.
Definitions:
● Position tracking is continued
The behavior of the position tracking during the changeover is the same as it would be if the
data set had not even been changed.
● Position tracking is newly initiated (the position actual value can change when the
changeover is made!)
The behavior during changeover is the same as the behavior after a POWER ON. The
position value read by the absolute encoder is compared to the stored value. If the position
difference is within the tolerance window (p2722), the position is corrected correspondingly;
if it is outside the range, a corresponding fault F07449 is output
● Position tracking is reset (the position actual value can change when the changeover is
made!)
The stored absolute value is rejected and the overflow counter is reset to zero.
Drive functions
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
0 1 2
A A B
Activa‐ Deacti‐
ted ted vated
3 4 5
A A A
Activa‐ Activa‐ Activa‐
ted ted ted
1)
Position tracking for EDS0 is no longer calculated and, as a
1)
Function modules
9.7 Position control
6 7 8
D A A
Activa‐ Activa‐ Deacti‐
ted ted vated
1)
When switching back to DDS0, the
1)
. When switching back to DDS0, the
1)
1)
9
C
Activa‐
ted
It
1)
When
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