M5: Measurement
7.3 Channel-specific measuring
Extended Functions
Function Manual, 03/2013, 6FC5397-1BP40-3BA1
445
7.3.2 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.
The measuring signal can be checked at the end of the program in the diagnostic menu
"PLC status".
Table 7- 1 Status display for measurement signal
Status display
Probe 1 deflected DB10, ...DBX107.0
Probe 2 deflected DB10, ...DBX107.1
The current measuring status of the axis is displayed by means of the interface signal DB31,
... DBX62.3.
Bit 3=1: Measurement
active Bit 3=0: Measurement not active
This signal can be displayed for all measurement functions and also be read in synchronized
actions with
● system variable $AA_MEAACT[axis].
References:
Function Manual, Synchronized Actions
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