Selectable Szs - Siemens SINUMERIK 840D sl Function Manual

The setting of a relative reference point via the operator panel is done via the general command
interface for the workpiece and tool measuring. The system frame $P_RELFR for relative
coordinate systems is calculated and activated as follows:
● $AC_MEAS_TYPE = 14
● PI-services _N_SETUDT(6, 7)
An example of setting the relative axis positions can be found in:
References:
Function Manual, Extended functions; Measurement (M5),
Section "Measurement of geometry and special axes (meas. type 14, 15)"
10.5.4.3

Selectable SZS

Within a cycle, machining is performed in a cycle-specific workpiece coordinate system (WCS).
The cycle-specific WCS results from SZS transformed by the programmable frame
$P_PFRAME and/or cycle frame $P_CYCFRAME programmed for the cycle.
If a cycle is interrupted by a machine operator, e.g. through an NC stop, traversing should then
be performed in the original coordinate system (SZS) valid before the activation of the cycle.
Machine data
The specification how the SZS is to be calculated from the cycle-specific WCS is set via the
following machine data.
MD24030 $MC_FRAME_ACS_SET = <value>
<value> Meaning
①
②
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
0 SZS = WCS transformed with $P_TRAFRAME, $P_PFRAME, $P_ISO4FRAME and $P_CY‐
CFRAME
1 SZS = WCS transformed only with $P_CYCFRAME
SZS = WCS transformed with $P_TRAFRAME, $P_PFRAME, $P_ISO4FRAME and $P_CY‐
CFRAME
SZS = WCS transformed only with $P_CYCFRAME
K2: Axis Types, Coordinate Systems, Frames
10.5 Frames
725