Festo Кабели и принадлежности - Manual (Page 65)

4. Commissioning
4−20
Festo P.BE−SPC200−SMX−1−EN en 0503b
Reference travel modes (see also Fig. 4/6):
Mode Description
0 Accepting the current axis position as reference point
1 Reference travel in negative direction to reference switch
(REF) with acceptance as reference point
2 Reference travel in negative direction to negative limit
switch (LIM−) with acceptance as reference point
3 Reference travel in positive direction to reference switch
(REF) with acceptance as reference point
4 Reference travel in positive direction to positive limit
switch (LIM+) with acceptance as reference point
Note that reference travel with modes 1 and 3 will result in
different reference points.
During reference travel the axis moves according to Fig. 4/6.
The mechanical arrangement of the reference or limit
switches clearly determines the reference point of an axis. In
each case, the position accepted as reference point is that at
which the slide leaves the switching range of the sensor.
Caution
If an incorrect reference travel mode is set, this can lead to
collisions, as all positions of the axis refer to the reference
point.
When carrying out reference travel, make sure that the
correct mode is used.