Siemens SINAMICS S120 Function Manual page 300

Function modules
7.9 Basic positioner
Status bit r2684.1 (passive/flying referencing active) is linked with binector input p2509
(activate measurement probe evaluation). It activates measurement probe evaluation.
Binector inputs p2510 (measurement probe selection) and p2511 (measurement probe edge
evaluation) can be used to set which measurement probe (1 or 2) and which measurement
edge (0/1 or 1/0) is to be used.
The measurement probe pulse is used to supply connector input p2660 (home measurement
value) with the measurement via parameter r2523. The validity of the measurement is
reported to binector input p2661 (measurement valid feedback) via r2526.2.
Note
The following must always apply to the "Flying referencing mode" windows:
p2602 (outer window) > p2601 (inner window).
See function diagram 3614 for more information on the "Flying referencing mode" function.
The following then happens:
● If the drive has not yet been homed, status bit r2684.11 (reference point set) is set to "1".
● If the drive has already been homed, status bit r2684.11 (reference point set) is not reset
● If the drive has already been homed and the position difference is less than the inner
● If the drive has already been homed and the position difference is more than the outer
● If the drive has already been referenced and the absolute value of the position difference
Note
Flying referencing is not an active operating mode. It is superimposed by an active operating
mode.
In contrast to searches for reference, 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).
Instructions for switching data sets
Using drive data set switching (DDS), motor data sets (p0186) and encoder data sets (p0187
to p0189) can be switched. The following table shows when the reference bit (r2684.11) or
the status of the adjustment with absolute encoders (p2507) is reset.
300
when starting flying referencing.
window (p2601), the old actual position value is retained.
window (p2602), warning 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.
is greater than the inner window (p2601) and less the outer window (p2602), then the
position actual value is corrected.
Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
Drive functions