Siemens SINUMERIK 840D sl Programming Manual page 263

Note
MEASA
distance-to-go can be programmed as a synchronized action.
If the measuring task with
will only be available in the machine coordinate system.
Measurement results for MEASA, MEAWA
The results of measurements are available under the following system variables:
● In the machine coordinate system:
$AA_MM1[<axis>]
...
$AA_MM4[<axis>]
● In the workpiece coordinate system:
$AA_WM1[<axis>]
...
$AA_WM4[<axis>]
Note
No internal preprocessing stop is generated when these variables are read. A preprocessing
stop must be programmed with
values will otherwise be read in.
Geometry axes/Transformations
If axial measurement is to be started for a geometry axis, the same measuring job must be
programmed explicitly for all remaining geometry axes. The same applies to axes involved in
a transformation.
Examples:
N10 MEASA[Z]=(1,1) MEASA[Y]=(1,1) MEASA[X]=(1,1) G0 Z100
or
N10 MEASA[Z]=(1,1) POS[Z]=100
Measurement job with two measuring systems
If a measuring job is executed by two measuring systems, each of the two possible trigger
events of both measuring systems of the relevant axis is acquired. The assignment of the
reserved variables is therefore preset:
$AA_MM1[<axis>]
$AA_MM2[<axis>]
Job Planning
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
cannot be programmed in synchronized actions. As an alternative,
MEAWA
Measured value of programmed measuring system on trigger event 1
...
Measured value of programmed measuring system on trigger event 4
Measured value of programmed measuring system on trigger event 1
...
Measured value of programmed measuring system on trigger event 4
or
or
4.8 Axial measurement (MEASA, MEAWA, MEAC) (option)
is started from synchronized actions, the measured values
at the appropriate position in the program. False
STOPRE
$AA_MW1[<axis>]
$AA_MW2[<axis>]
Special motion commands
plus delete
MEAWA
Measured value from measuring
system 1 on trigger event 1
Measured value from measuring
system 2 on trigger event 1
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