Measurement Results - Siemens SINUMERIK 840D sl Function Manual

M5: Measurement
8.3 Channel-specific measuring
The measuring job is aborted with RESET or when the program advances to a new block.
Note
If a geometry axis is programmed in a measuring block, the measured values are stored for
all current geometry axes.
If an axis participating in a transformation is programmed in a measurement block, the
measured values for all axes participating in this transformation are recorded.
Probe status
It is possible to scan the probe status directly in the part program and in synchronized actions.
$A_PROBE[n] where n= probe
$A_PROBE[n]==1: Probe deflected
$A_PROBE[n]==0: Probe not deflected
8.3.2

Measurement results

Reading measurement results
The results of the measurement commands are stored in system data of the NCK and can be
read via system variables in the part program.
● System variable $AC_MEA[No]
Query measurement job status signal.
[No] stands for probe (1 or 2)
The variable is deleted at the beginning of a measurement. The variable is set as soon as
the probe fulfills the activation criterion (rising or falling edge). Execution of the
measurement job can thus be checked in the part program.
● System variable $AA_MM[axis]
Access to measured value in the machine coordinate system (MCS)
Read in part program and in synchronized actions.
[Axis] stands for the name of the measurement axis (X, Y, ...).
● System variable $AA_MW[axis]
Access to measured value in the workpiece coordinate system.
Read in part program and in synchronized actions.
[Axis] stands for the name of the measurement axis (X, Y, ...).
PLC service display
The functional test for the probe is performed using an NC program.
500
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Extended Functions