Data Set Switchover - Siemens SINAMICS S120 Function Manual

The following then happens:
● If the drive has not yet been referenced, status bit r2684.11 (reference point set) is set to "1".
● If the drive has already been referenced, status bit r2684.11 (reference point set) is not reset
when starting flying referencing.
● If the drive has already been referenced and the position difference is less than the inner
window (p2601), the old actual position value is retained.
● If the drive has already been referenced and the position difference is more than the outer
window (p2602), alarm A07489 (reference point offset outside window 2) is output and the
status bit r2684.3 (pressure mark outside window 2) set. No offset to the actual position
value is undertaken.
● If the drive has already been referenced and the position difference is more than the inner
window (p2601) and less that the outer window (p2602), the actual position value is offset.
Note
On-the-fly referencing is superimposed on an active operating mode, it is therefore not an
active mode.
In contrast to reference point approach, flying referencing can be carried out superimposed by
the machine process.
As standard, for flying referencing, measuring probe evaluation is used; when enabled, the
measuring probe is selected (p2510) and the edge evaluation (p2511) (in the factory setting,
measuring probe 1 is always the measuring probe, flank evaluation in the factory setting is
always the 0/1 edge).
9.8.4.3

Data set switchover

Function description
Using drive data set changeover (DDS), motor data sets (MDS, p0186) and encoder data sets
(EDS, p0187 to p0189) can be changed over. The following table shows when the reference bit
(r2684.11) or the status of the adjustment with absolute encoders (p2507) is reset.
In the following cases, when a DDS changeover takes place, the actual position value becomes
invalid (p2521 = 0) and the reference point (r2684.11 = 0) is reset.
● The EDS that is effective for the position control changes.
● The encoder assignment changes (p2502).
● The mechanical relationships change (p2503...p2506)
With absolute encoders, the status of the adjustment (p2507) is also reset, if the same absolute
encoder is selected for the position control although the mechanical conditions have changed
(p2503 to p2506).
In the operation state, a fault (F07494) is also output.
Drive functions
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
Function modules
9.8 Basic positioner
483