Siemens sinumerik 840D sl Function Manual page 358

Detailed description
2.7 Extended stop and retract (ESR)
POLFMLIN
The language command POLFMLIN([ axis name1], [axis name2], ....) allows selection of the
axes that are to travel on activation of fast lift with POLF, to defined positions in linear
reference. A variable parameter list can be used to select any number of axes for lift fast;
however, all axes must be located in the same co-ordinate system, (i.e. only geo axes).
Between initiating retraction and the linear relation being reached, a path is traveled, which,
although deviating from the programmed path, does not quite reach the linear relation. If the
constellation is unsuitable, this transition may last as far as the end points programmed with
POLF. The control optimizes to the shortest possible transition.
General
The following sections are equally valid for POLFMASK and POLFMLIN.
The parameters valid at triggering time are decisive for the retraction movement. If one of
these parameters (G code, POLF, POLFMASK or POLFMLIN, Frame, etc.) changes during
retraction (block change), this change does not affect the retracting movement that has
already been started.
Before fastlift to a fixed position can be activated via POLFMASK or POLFMLIN, a position
must be programmed with POLF for the selected axes. No machine data is provided for
presetting the values of POLF.
During interpretation of POLFMASK or POLFMLIN, alarm 16016 is issued if POLF has not
been programmed.
If retraction is activated, the position for retraction can still be changed. However, it is no
longer possible to change the coordinate system and an attempt is rejected with an alarm
16015.
If POLF is programmed again after releasing retraction, the position at which this axis was
first programmed must be specified in the co-ordinate system, in which the first programming
of this axis was done.
Change coordinate system
If the co-ordinate system is to be changed, fast lift must first be deactivated with
POLFMASK() or POLFMLIN() , and then programming with POLF can commence in the new
co-ordinate system.
Deactivate fast lift
POLFMASK() or POLFMLIN() without specifying an axis deactivates lift fast for all axes
activated in that enable call.
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Special functions: Axis Couplings and ESR (M3)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0