Festo Контроллеры двигателя SFC-LAC - Manual (Page 29)

1. System overview
1−11 Festo GDCP−SFC−LACI−IO−EN en 0812NH
1.5 Measuring reference system
Homing Homing determines the position of the homing reference
point REF. When homing is concluded, the axis stands at
the axis zero point AZ.
The homing method The homing method defines how the homing point REF is
determined.
Reference point REF binds the measuring reference system to a proximity sensor
or a fixed stop, depending on the homing method.
Axis zero point AZ is shifted by a defined distance to the reference point REF
(offset of the axis zero point).
The software end positions and the project zero point are
defined in relation to the axis zero point.
Project zero point PZ is a point to which the actual position and the target posiĆ
tions from the position set table relate.
The project zero point is shifted by a defined distance to the
axis zero point AZ (offset of the project zero point). The offset
of the project zero point cannot be adjusted via the control
panel.
Software end positions limit the permitted positioning range (effective stroke). If the
target position of a positioning command lies outside the
software end positions, the positioning command will not be
processed and an error will be registered.
Effective stroke The distance between the two software end positions. The
maximum stroke which the axis can perform with the paraĆ
meters currently set.
Offset homing point The distance of the homing point REF from the retracted end
position (tolerance +/− 1 mm). For reasons of technical conĆ
trol, this has to be measured and parametrised. See figures
in Tab. 1/2 and Tab. 1/3.