Siemens SINUMERIK 808D Function Manual

Function Manual
138 01/2017
13.3
Channel-specific measuring
13.3.1
Measuring mode
Measuring commands MEAS and MEAW
The measuring operation is activated from the part program. A trigger event and a measuring mode are programmed. Two
different measuring modes are available:
●
MEAS
: Measurement with deletion of distance-to-go
Example:
N10 G1 F300 X300 Z200 MEAS=-1
Trigger event is the falling edge (-) of probe 1: from deflected to non-deflected status.
●
MEAW
: Measurement without deletion of distance-to-go
Example:
N20 G1 F300 X300 Y100 MEAW=1
Trigger event is the rising edge (+) of probe 1: from non-deflected to deflected status.
The measurement block is terminated when the probe signal has arrived or the programmed position has been reached. The
measurement job can be cancelled with the following key:
Reference:
SINUMERIK 808D/SINUMERIK 808D ADVANCED Programming and Operating Manual
Note
If a GEO axis (axis in the WCS) is programmed in a measuring block, the measured values are stored for all current GEO
axes.
13.3.2
Measurement results
Reading measurement results in the program
The results of the measuring command can be read in the part program via system variables.
● System variable
$AC_MEA[1]
Query measurement job status signal.
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. [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. [axis] stands for the name of the
measurement axis (X, Y, ...).
References:
SINUMERIK 808D/SINUMERIK 808D ADVANCED Programming and Operating Manual
PLC service display
The measuring signal can be controlled via the following operations:
+ → →
IS "Probe 1 activated" (DB2700.DBX0001.0).
The current measuring status of the axis is shown by the IS "Measurement active" (measuring block with this axis running).

Siemens SINUMERIK 808D Specifications

General

Brand	Siemens
Model	SINUMERIK 808D
Category	Control Unit
Language	English