Festo Контроллер крайних положений SPC11 - Manual (Page 67)

4. Commissioning
4-9
Festo P.BE-SPC11-SYS-EN en 1406e
Nominal stroke length (L)
of the drive [mm] Nominal stroke length (L) of the drive, see type designation
on the type plate (e.g. type DNCI-32-300-P-A has a nominal
stroke length of 300 mm).
Offset axis zero point (r)
[mm] For a good positioning behaviour, the SPC11 must know the
positioning range used by the drive. The offset axis zero
point specifies the offset between the end position P.01 and
the axis zero point. With an offset of 0 cm, the end position
P.01 lies in the axis zero point.
Remarks on reference travel
With incremental path measuring systems, the measurement
variable refers to a reference point and is determined by
counting equally large measurement steps (increments). The
relationship between measurement variable and current posi-
tion is created through the reference travel.
Referencing in the teach
procedure In the teach procedure (see also section 4.3.1), the end
positions P.01 and P.02 are approached. This creates the
relationship between measurement variable and current
position. Reference travel is not necessary.
Reference travel after
POWER ON After the SPC11 operating voltage is switched on again, the
relationship between measurement variable and current
position is lost. Reference travel into the end positions P.01
or P.02 is necessary (see also section 4.4).