Speed Setpoint Output - Siemens SINUMERIK 840D sl Function Manual

Reference point and position reference
Loss of the position reference
The controller cannot detect all possible situations that can lead to loss of the machine position
reference. Therefore, it is the responsibility of the commissioning engineer or user to initiate
explicit referencing of zero marker synchronization in such cases.
In the case of gear changes, it is not possible to make a statement about the effect of the
reference point or machine position reference on the encoder scaling. In such cases, the
controller partially cancels the status "Axis referenced/synchronized".
If the position reference to the machine, tool, etc., has been lost, it must first be restored through
appropriate adjustment or referencing of the lost reference point. This is especially important
for the functions Travel to fixed stop, Referencing to Bero, Cam and Zero marker.
Note
In order to permit new referencing without an interrupting RESET,
machine data:
MD34080 $MA_REFP_MOVE_DIST
and
MD34090 $MA_REFP_MOVE_DIST_CORR
are changed over to NewConfig effectiveness.
For further explanations, see Section "R1: Referencing (Page 1149)".
7.4.4

Speed setpoint output

Control direction and travel direction of the feed axes
You must determine the travel direction of the feed axis before starting work.
Control direction
Before the position control is started up, the speed controller and current controller of the drive
must be started up and optimized.
Travel direction
With the machine data:
MD32100 $MA_AX_MOTION_DIR (travel direction),
the direction of motion of the axis can be reversed,
without affecting the control direction of the position control.
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
G2: Velocities, setpoint / actual value systems, closed-loop control
CAUTION
7.4 Setpoint/actual-value system
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