Festo MTR-DCI, Руководство пользователя, Страница: 28 / 184

1. System summary
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Festo P.BE−MTR−DCI−IO−EN en 0606b
1.1.2 Basis points and work range
The basis system of the MTR−DCI is based on the axis zero
point which is defined by the offset to the reference point.
The position of the reference point is defined by reference
travel. The referencing method defines the way in which the
reference point is ascertained. When the reference travel is
finished, the drive stands at the axis zero point.
Reference point REF forms the mechanical starting point of the measuring system
and is defined by reference travel with a reference switch or a
fixed stop, depending on the referencing method. It is the
basis point of the axis zero point.
Axis zero point AZ is shifted by a defined distance from the reference point (axis
zero point offset) and is the basis point of the software end
positions and the project zero point. By defining the axis zero
point and the software end positions you can limit the work
area of the linear axis to the permitted range (work stroke).
Software end positions limit the permitted positioning range (work stroke). If the
target position of a positioning command lies outside the
software end positions, the positioning command will not be
processed and a fault status will be displayed.
Project zero point PZ is a basis point which the user can freely select within the
work stroke and to which the actual position as well as the
target positions in the position set table refer. The axis zero
point is the basis point for the project zero point.
The project zero point is specified with the MTR−DCI and is
identical to the axis zero point (project zero point offset = 0).