Positioning Axis Technology Object - Siemens SIMATIC S7-1500 Function Manual

Basics

3.4 Positioning axis technology object

3.4 Positioning axis technology object
The positioning axis technology object calculates position setpoints, taking account of the
specified dynamics, and outputs corresponding speed control setpoints to the drive. All
movements of the positioning axis occur under position control. For absolute positioning, the
physical position must be known to the positioning axis technology object.
Each positioning axis is assigned a drive by means of a PROFIdrive frame or by means of
an analog setpoint interface, and an encoder by means of a PROFIdrive frame.
The relationship between the encoder values and a defined position is created by assigning
parameters to the mechanical properties and the encoder settings, as well as to a homing
process. The technology object can also perform movements without a position relationship,
and relative position movements, even without being in a homed status.
Depending on the execution of the mechanics, a positioning axis is implemented as linear
axis or rotary axis (Page 26).
The figure below shows the basic principle of operation of the positioning axis technology
object:
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S7-1500 Motion Control V13 Update 3
Function Manual, 07/2014, A5E03879256-AC