Set Actual Values (Preseton) - Siemens SINUMERIK 840D sl Programming Manual

10.4.19

Set actual values (PRESETON)

Function
When PRESETON (axis, value) is executed, the current axis position is not changed but a
new value is assigned to it.
PRESETON from synchronized actions can be programmed for
• modulo rotary axes that have been started from the parts program and
• all command axes that have been started from a synchronized action
Programming
DO PRESETON(axis, value)
Parameters
DO PRESETON
Axis
Value
Restrictions for axes
PRESETON cannot be programmed for axes, which are involved in a transformation.
One and the same axis can by moved from the parts program and from a synchronized
action, only at different times. For this reason, delays can occur in the programming of an
axis from the parts program if the same axis has been program in a synchronized action first.
If the same axis is used alternately, transfer between the two axis movements is
coordinated. Parts program execution must be interrupted for that.
Example
Moving the control zero of an axis
WHEN $AA_IM[a] >= 89.5 DO PRESETON(a4,10.5)
;Offset control zero of axis a by 10.5 length units (inch or mm) in the positive
;axis direction.
Job planning
Programming Manual, 03/2006 Edition, 6FC5398-2BP10-1BA0
10.4 Actions in synchronized actions
Setting actual values in synchronized actions
Axis of which the control zero is to be
changed
The value by which the control zero is to be
changed
Motion synchronous actions
10-53