Siemens SINUMERIK 840D sl Function Manual page 676

M5: Measuring
8.4 Setting zeros, workpiece measuring and tool measuring
In the case of the tool position of two turning tools with one reference point, not only are the
input variables of measurement type 23 evaluated but also the values of the following input
variables:
Approach direction and tool orientation +x
$AC_MEAS_TOOL_MASK = 0x2
$AC_MEAS_DIR_APPROACH = 0
676
Approach direction and tool orientation -x
$AC_MEAS_TOOL_MASK = 0x40 + 0x200
$AC_MEAS_DIR_APPROACH = 1
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Extended Functions