Siemens SINAMICS S120 Function Manual page 479

NOTICE
Adjustment only in a defined encoder range
During adjustment with the rotary absolute encoder, a range is aligned symmetrically
around the zero point with half the encoder range within which the position is restored after
switch off/on. If position tracking is deactivated (2720.0 = 0), only one encoder overflow is
permitted to occur in this range (for further information, see Section Actual position value
processing (Page 448)). Once adjustment has been carried out, the range must not be
exited because a unique reference between the actual encoder value and the mechanical
components cannot be established outside the range.
If the reference point p2599 is in the encoder range, the actual position value is set in line
with the reference point during adjustment. Otherwise, it is set to a corrected value in the
encoder range.
No overflow occurs with linear absolute encoders, which means that the position can be
restored within the entire traversing range after switch off/on once adjustment has been
carried out. During adjustment, the actual position value is set in line with the reference
point.
Referencing with DRIVE-CLiQ encoders
DRIVE-CLiQ encoders are available as either "multiturn" or "singleturn" absolute encoders. If
the "referencing" function is selected via the PROFIdrive encoder interface and if a DRIVE-
CLiQ encoder or other type of absolute encoder is connected via the DRIVE-CLiQ interface,
the zero point of the singleturn position is used as the reference point.
Further information on commissioning DRIVE-CLiQ encoders is provided in the SINAMICS
S120 Commissioning Manual.
Drive functions
Function Manual, (FH1), 04/2014, 6SL3097-4AB00-0BP4
Function modules
8.8 Basic positioner
479