Festo Электромотор MTR-DCI - Manual (Page 41)

1. System overview
1-19 Festo P.BE-MTR-DCI-DN-EN en 1209a
1.6 Dimensional reference system
For commissioning, a dimensional reference system for
homing the reference coordinates must be defined.
The dimensional reference system defines all the (absolute)
positions, which can then be approached.
1.6.1 Reference points and positioning range
The dimensional reference system is defined by:
1. Homing for determining the reference point
2. Setting the zero point (Offset between axis zero point and
project zero point)
3. Limiting of the travel range (software end positions)
Homing point REF anchors the dimensional reference system at a reference
switch or fixed stop, depending on the homing method
chosen. (see also section “Homing”).
Axis zero point AZ is a point at a defined distance from the homing point REF
(this distance is the axis zero point offset).
Project zero point PZ is a point of reference within the effective stroke which the
user can select, and to which both the actual position and the
target positions in the position set table refer.
The project zero point is a point at a defined distance from
the axis zero point AZ (this distance is the project zero point
offset). The project zero point PZ can only be set via FCT, or
by using the CI object 21F4
h , or FHPP PNU 500 (not at control
panel).
Software end point Setting the software end points limits the permissible travel
range (effective stroke). The software end points are relative
to the axis zero point. If a positioning command's target posi-
tion lies outside the software end positions, the positioning
command will not be executed and a fault status will be set.